In a young patient who has been experiencing bloody diarrhea for more than 6 weeks, it is important to consider inflammatory bowel disease as a possible diagnosis. The challenge lies in distinguishing between ulcerative colitis and Crohn’s disease. In this case, a biopsy was performed and the results showed the presence of inflammatory cell infiltrate and crypt abscesses, which strongly suggests a diagnosis of ulcerative colitis.

Ulcerative colitis:
– Typically affects only the rectum and colon
– The terminal ileum may be affected if backwash ileitis occurs
– Does not have skip lesions (areas of normal mucosa between affected areas)
– Decreased incidence in smokers
– Common associations include liver conditions such as primary biliary cirrhosis, chronic active hepatitis, and primary sclerosing cholangitis
– Other systemic manifestations are less common compared to Crohn’s disease
– Pathological features include primarily affecting the mucosa and submucosa, presence of mucosal ulcers, inflammatory cell infiltrate, and crypt abscesses
– Clinical features include less prominent abdominal pain, bloody diarrhea in 90% of cases, passage of mucus, and possible fever
– Barium studies may show a granular appearance, button-shaped ulcers, and loss of normal haustral markings
– Complications include a 20-fold increase in the 20-year risk of colonic carcinoma, iron deficiency anemia, and rare occurrence of fistulae

Crohn’s disease:
– Can affect any part of the gastrointestinal tract from the mouth to the anus
– May have skip lesions of normal mucosa between affected areas
– Increased incidence in smokers
– Systemic manifestations are more common compared to ulcerative colitis, including erythema nodosum, pyoderma gangrenosum, iritis/uveitis, cholelithiasis, and joint pain/arthropathy
– Pathological features include transmural inflammation, presence of lymphoid aggregates and neutrophil infiltrates, and non-caseating granulomas seen in 30% of cases
– Clinical features include more prominent abdominal pain, common occurrence of diarrhea (which can also be bloody), frequent and oral lesions, and possible fever
– Barium studies may show severe mucosal ulcers

This patient exhibits signs of potentially life-threatening asthma. In adults, acute severe asthma is characterized by a peak expiratory flow (PEF) of 33-50% of the best or predicted value, a respiratory rate exceeding 25 breaths per minute, a heart rate over 110 beats per minute, and an inability to complete sentences in one breath. On the other hand, life-threatening asthma is indicated by a PEF below 33% of the best or predicted value, a blood oxygen saturation (SpO2) below 92%, a partial pressure of oxygen (PaO2) below 8 kPA, a normal partial pressure of carbon dioxide (PaCO2) within the range of 4.6-6.0 kPa, a silent chest, cyanosis, poor respiratory effort, exhaustion, altered consciousness, and hypotension.

To address acute asthma in adults, the recommended drug doses include administering 5 mg of salbutamol through an oxygen-driven nebulizer, delivering 500 mcg of ipratropium bromide via an oxygen-driven nebulizer, providing 40-50 mg of prednisolone orally, administering 100 mg of hydrocortisone intravenously, and infusing 1.2-2 g of magnesium sulfate intravenously over a period of 20 minutes.

According to the current Advanced Life Support (ALS) guidelines, it is advisable to seek senior advice before considering the use of intravenous aminophylline in cases of severe or life-threatening asthma. If used, a loading dose of 5 mg/kg should be given over 20 minutes, followed by a continuous infusion of 500-700 mcg/kg/hour. To prevent toxicity, it is important to maintain serum theophylline levels below 20 mcg/ml.

In situations where inhaled therapy is not feasible, intravenous salbutamol can be considered, with a slow administration of 250 mcg. However, it should only be used when a patient is receiving bag-mask ventilation.

It is worth noting that there is currently no evidence supporting the use of leukotriene receptor antagonists, such as montelukast, or Heliox in the management of acute severe or life-threatening asthma.

For further information, please refer to the BTS/SIGN Guideline on the Management of Asthma.

ATLS guidelines now suggest administering only 1 liter of crystalloid fluid during the initial assessment. If patients do not respond to the crystalloid, it is recommended to quickly transition to blood products. Studies have shown that infusing more than 1.5 liters of crystalloid fluid is associated with higher mortality rates in trauma cases. Therefore, it is advised to prioritize the early use of blood products and avoid large volumes of crystalloid fluid in trauma patients. In cases where it is necessary, massive transfusion should be considered, defined as the transfusion of more than 10 units of blood in 24 hours or more than 4 units of blood in one hour. For patients with evidence of Class III and IV hemorrhage, early resuscitation with blood and blood products in low ratios is recommended.

Based on the findings of significant trials, such as the CRASH-2 study, the use of tranexamic acid is now recommended within 3 hours. This involves administering a loading dose of 1 gram intravenously over 10 minutes, followed by an infusion of 1 gram over eight hours. In some regions, tranexamic acid is also being utilized in the prehospital setting.

Acute kidney injury (AKI), previously known as acute renal failure, is a sudden decline in kidney function. This leads to the accumulation of urea and other waste products in the body, as well as disturbances in fluid balance and electrolyte levels. AKI can occur in individuals with previously normal kidney function or those with pre-existing kidney disease, known as acute-on-chronic kidney disease.

AKI is categorized into three stages based on specific criteria. In stage 1, there is a rise in creatinine levels of 26 micromol/L or more within 48 hours, or a rise of 50-99% from baseline within 7 days (1.5-1.99 times the baseline). Additionally, a urine output of less than 0.5 mL/kg/hour for more than 6 hours is indicative of stage 1 AKI.

Stage 2 AKI is characterized by a creatinine rise of 100-199% from baseline within 7 days (2.0-2.99 times the baseline), or a urine output of less than 0.5 mL/kg/hour for more than 12 hours.

In stage 3 AKI, there is a creatinine rise of 200% or more from baseline within 7 days (3.0 or more times the baseline). Alternatively, a creatinine rise to 354 micromol/L or more with an acute rise of 26 micromol/L or more within 48 hours, or a rise of 50% or more within 7 days, is indicative of stage 3 AKI. Additionally, a urine output of less than 0.3 mL/kg/hour for 24 hours or anuria (no urine output) for 12 hours also falls under stage 3 AKI.

This patient is currently experiencing moderate shock, classified as class III. This level of shock corresponds to a loss of 30-40% of their circulatory volume, which is equivalent to a blood loss of 1500-2000 mL.

Hemorrhage can be categorized into four classes based on physiological parameters and clinical signs. These classes are classified as class I, class II, class III, and class IV.

In class I hemorrhage, the blood loss is up to 750 mL or up to 15% of the blood volume. The pulse rate is less than 100 beats per minute, and the systolic blood pressure is normal. The pulse pressure may be normal or increased, and the respiratory rate is within the range of 14-20 breaths per minute. The urine output is greater than 30 mL per hour, and the patient’s CNS/mental status is slightly anxious.

In class II hemorrhage, the blood loss ranges from 750-1500 mL or 15-30% of the blood volume. The pulse rate is between 100-120 beats per minute, and the systolic blood pressure is still normal. The pulse pressure is decreased, and the respiratory rate increases to 20-30 breaths per minute. The urine output decreases to 20-30 mL per hour, and the patient may experience mild anxiety.

In class III hemorrhage, like the case of this patient, the blood loss is between 1500-2000 mL or 30-40% of the blood volume. The pulse rate further increases to 120-140 beats per minute, and the systolic blood pressure decreases. The pulse pressure continues to decrease, and the respiratory rate rises to 30-40 breaths per minute. The urine output significantly decreases to 5-15 mL per hour, and the patient becomes anxious and confused.

In class IV hemorrhage, the blood loss exceeds 2000 mL or more than 40% of the blood volume. The pulse rate is greater than 140 beats per minute, and the systolic blood pressure is significantly decreased. The pulse pressure is further decreased, and the respiratory rate exceeds 40 breaths per minute. The urine output becomes negligible, and the patient’s CNS/mental status deteriorates to a state of confusion and lethargy.

Patients with Parkinson’s disease (PD) typically exhibit the following clinical features:

– Hypokinesia (reduced movement)
– Bradykinesia (slow movement)
– Rest tremor (usually occurring at a rate of 4-6 cycles per second)
– Rigidity (increased muscle tone and ‘cogwheel rigidity’)

Other commonly observed clinical features include:

– Gait disturbance (characterized by a shuffling gait and loss of arm swing)
– Loss of facial expression
– Monotonous, slurred speech
– Micrographia (small, cramped handwriting)
– Increased salivation and dribbling
– Difficulty with fine movements

Initially, these signs are typically seen on one side of the body at the time of diagnosis, but they progressively worsen and may eventually affect both sides. In later stages of the disease, additional clinical features may become evident, including:

– Postural instability
– Cognitive impairment
– Orthostatic hypotension

Although PD primarily affects movement, patients often experience psychiatric issues such as depression and dementia. Autonomic disturbances and pain can also occur, leading to significant disability and reduced quality of life for the affected individual. Additionally, family members and caregivers may also be indirectly affected by the disease.

The clinical history and examination strongly suggest that the patient has a pulmonary embolism caused by a deep vein thrombosis in his right leg.

The typical symptoms of a pulmonary embolism include shortness of breath, chest pain that worsens with breathing, coughing, and/or coughing up blood. There may also be symptoms indicating the presence of a deep vein thrombosis. Other signs include rapid breathing and heart rate, fever, and in severe cases, signs of shock, an abnormal heart rhythm, and increased pressure in the jugular veins.

Given the patient’s high probability Wells score, it is recommended that an immediate CT pulmonary angiogram (CPTA) be performed. This test is considered the most reliable method for diagnosing a pulmonary embolism. A d-dimer test would not provide any additional benefit in this case. While a chest X-ray and ECG may provide useful information, they alone cannot confirm the diagnosis.

For patients who have an allergy to contrast media, renal impairment, or are at high risk from radiation exposure, a ventilation/perfusion single-photon emission computed tomography (V/Q SPECT) scan or a V/Q planar scan can be offered as an alternative to CTPA.

Carpal tunnel syndrome is a condition where the median nerve becomes trapped, resulting in nerve damage. This can lead to weakness and abnormal sensations in the areas supplied by the median nerve. To remember the muscles that are innervated by the median nerve, you can use the acronym ‘LOAF’: L for the lateral two lumbricals, O for the Opponens pollicis, A for the Abductor pollicis, and F for the Flexor pollicis brevis. It’s important to note that the abductor digiti minimi is not affected by carpal tunnel syndrome as it is innervated by the deep branch of the ulnar nerve.

Metastatic spinal cord compression (MSCC) occurs when a tumor mass compresses the thecal sac and its components, leading to a spinal emergency. If the pressure on the spinal cord is not relieved promptly, it can result in irreversible loss of neurological function. The most crucial factor for predicting functional outcomes is the patient’s neurological function before treatment. Therefore, delayed treatment can lead to permanent disability and a decrease in quality of life.

The most common cancers that cause MSCC include prostate, lung, breast, and myeloma. In approximately 10 to 20% of cancer patients, MSCC is the first noticeable symptom. It is important to consider MSCC in any patient with a history of cancer if they experience any of the following symptoms: severe or worsening lower back pain, nocturnal pain that disrupts sleep, localized spinal tenderness, radicular pain, or neurological symptoms.

Thoracic pain can also be an indicator of MSCC or an aortic aneurysm. In patients aged 60 or older with persistent back pain, myeloma should be considered. For patients aged 60 or older with accompanying weight loss, pancreatic cancer should be taken into consideration.

Tricuspid regurgitation leads to a pansystolic murmur that is most pronounced in the tricuspid area during inhalation. The primary cause of tricuspid regurgitation is right ventricular failure.

Other clinical signs that may be present in tricuspid regurgitation include a raised jugular venous pressure (JVP) and giant C-V waves. Additionally, features of increased right atrial pressure, such as ascites and dependent edema, may be observed. Pulsatile hepatomegaly and a thrill at the left sternal edge are also possible indicators. Reverse splitting of the second heart sound, due to early closure of the pulmonary valve, and a third heart sound, caused by rapid right ventricular filling, may be heard as well.

Aortic regurgitation, on the other hand, produces an early diastolic murmur that is most audible at the lower left sternal edge when the patient is sitting forward and exhaling.

In the case of mitral stenosis, a rumbling mid-diastolic murmur is best heard at the apex while the patient is in the left lateral position and exhaling, using the bell of the stethoscope.

Atrial myxomas are benign tumors that can develop in the heart. Most commonly found on the left side, they may obstruct the mitral valve, resulting in a mid-diastolic murmur similar to that of mitral stenosis.

Lastly, left anterior descending artery stenosis can cause an early diastolic murmur, also known as Dock’s murmur. This murmur is similar to that of aortic regurgitation and is best heard at the left 2nd or 3rd intercostal space.

This woman is showing signs of obstructive jaundice along with a history of ulcerative colitis. The most probable diagnosis in this case is primary sclerosing cholangitis (PSC). PSC is a condition that causes inflammation and blockage of the bile ducts, leading to progressive damage. It is characterized by recurrent episodes of cholangitis and the development of scar tissue in the bile ducts. In severe cases, it can lead to liver cirrhosis, liver failure, and even liver cancer. PSC is commonly associated with ulcerative colitis, with more than 80% of PSC patients also having ulcerative colitis.

The underlying cause of PSC is believed to be autoimmune in nature. Around 80% of patients with PSC test positive for p-ANCA antibodies, which are associated with autoimmune diseases. Other antibodies such as antinuclear antibodies (ANA) and anti-smooth muscle antibodies may also be present, but they are only found in about one-third of PSC patients.

Autoimmune hepatitis, on the other hand, is a liver inflammation caused by a decrease in regulatory T-cells (Treg cells), leading to the production of autoantibodies against hepatocyte surface antigens. It primarily affects women (70%) between the ages of 15 and 40. The condition causes chronic and progressive hepatitis, often presenting in the later stages when the patient is severely unwell and jaundiced. Liver function tests typically show significantly elevated levels of transaminases (ALT and AST), often more than ten times the normal range. Alkaline phosphatase (ALP) levels may be normal or slightly elevated. Antinuclear antibodies (ANA) are positive in approximately 80% of cases, while smooth muscle antibodies (SMA) are positive in about 70% of cases. Antimitochondrial antibodies are usually low or absent.

Primary biliary cirrhosis is another autoimmune liver disease that leads to the progressive destruction of the small bile ducts in the liver, primarily affecting the intralobular ducts. This results in cholestatic jaundice, liver fibrosis, and eventually cirrhosis. The condition is more common in women (90%) and typically occurs between the ages of 30 and 65. Liver function tests show predominantly elevated levels of alkaline phosphatase (ALP), often before any symptoms or signs of the disease appear.

To prevent the aspiration of gastric contents, it is recommended to apply a force of 30-40 Newtons to the cricoid cartilage during cricoid pressure.

Further Reading:

Rapid sequence induction (RSI) is a method used to place an endotracheal tube (ETT) in the trachea while minimizing the risk of aspiration. It involves inducing loss of consciousness while applying cricoid pressure, followed by intubation without face mask ventilation. The steps of RSI can be remembered using the 7 P’s: preparation, pre-oxygenation, pre-treatment, paralysis and induction, protection and positioning, placement with proof, and post-intubation management.

Preparation involves preparing the patient, equipment, team, and anticipating any difficulties that may arise during the procedure. Pre-oxygenation is important to ensure the patient has an adequate oxygen reserve and prolongs the time before desaturation. This is typically done by breathing 100% oxygen for 3 minutes. Pre-treatment involves administering drugs to counter expected side effects of the procedure and anesthesia agents used.

Paralysis and induction involve administering a rapid-acting induction agent followed by a neuromuscular blocking agent. Commonly used induction agents include propofol, ketamine, thiopentone, and etomidate. The neuromuscular blocking agents can be depolarizing (such as suxamethonium) or non-depolarizing (such as rocuronium). Depolarizing agents bind to acetylcholine receptors and generate an action potential, while non-depolarizing agents act as competitive antagonists.

Protection and positioning involve applying cricoid pressure to prevent regurgitation of gastric contents and positioning the patient’s neck appropriately. Tube placement is confirmed by visualizing the tube passing between the vocal cords, auscultation of the chest and stomach, end-tidal CO2 measurement, and visualizing misting of the tube. Post-intubation management includes standard care such as monitoring ECG, SpO2, NIBP, capnography, and maintaining sedation and neuromuscular blockade.

Overall, RSI is a technique used to quickly and safely secure the airway in patients who may be at risk of aspiration. It involves a series of steps to ensure proper preparation, oxygenation, drug administration, and tube placement. Monitoring and post-intubation care are also important aspects of RSI.

If a patient is critically ill and shows symptoms highly indicative of methemoglobinemia, treatment may be started before the blood results are available.

Bier’s block is a regional intravenous anesthesia technique commonly used for minor surgical procedures of the forearm or for reducing distal radius fractures in the emergency department (ED). It is recommended by NICE as the preferred anesthesia block for adults requiring manipulation of distal forearm fractures in the ED.

Before performing the procedure, a pre-procedure checklist should be completed, including obtaining consent, recording the patient’s weight, ensuring the resuscitative equipment is available, and monitoring the patient’s vital signs throughout the procedure. The air cylinder should be checked if not using an electronic machine, and the cuff should be checked for leaks.

During the procedure, a double cuff tourniquet is placed on the upper arm, and the arm is elevated to exsanguinate the limb. The proximal cuff is inflated to a pressure 100 mmHg above the systolic blood pressure, up to a maximum of 300 mmHg. The time of inflation and pressure should be recorded, and the absence of the radial pulse should be confirmed. 0.5% plain prilocaine is then injected slowly, and the time of injection is recorded. The patient should be warned about the potential cold/hot sensation and mottled appearance of the arm. After injection, the cannula is removed and pressure is applied to the venipuncture site to prevent bleeding. After approximately 10 minutes, the patient should have anesthesia and should not feel pain during manipulation. If anesthesia is successful, the manipulation can be performed, and a plaster can be applied by a second staff member. A check x-ray should be obtained with the arm lowered onto a pillow. The tourniquet should be monitored at all times, and the cuff should be inflated for a minimum of 20 minutes and a maximum of 45 minutes. If rotation of the cuff is required, it should be done after the manipulation and plaster application. After the post-reduction x-ray is satisfactory, the cuff can be deflated while observing the patient and monitors. Limb circulation should be checked prior to discharge, and appropriate follow-up and analgesia should be arranged.

There are several contraindications to performing Bier’s block, including allergy to local anesthetic, hypertension over 200 mm Hg, infection in the limb, lymphedema, methemoglobinemia, morbid obesity, peripheral vascular disease, procedures needed in both arms, Raynaud’s phenomenon, scleroderma, severe hypertension and sickle cell disease.

A 7-year-old girl is brought to the emergency department after being bitten by a bee. She is experiencing swelling in her arm and difficulty breathing, which are signs of anaphylaxis. To treat this condition, the most suitable dose of adrenaline to administer to the patient is 300 micrograms (0.3ml 1 in 1,000) by intramuscular injection.

Further Reading:

Anaphylaxis is a severe and life-threatening hypersensitivity reaction that can have sudden onset and progression. It is characterized by skin or mucosal changes and can lead to life-threatening airway, breathing, or circulatory problems. Anaphylaxis can be allergic or non-allergic in nature.

In allergic anaphylaxis, there is an immediate hypersensitivity reaction where an antigen stimulates the production of IgE antibodies. These antibodies bind to mast cells and basophils. Upon re-exposure to the antigen, the IgE-covered cells release histamine and other inflammatory mediators, causing smooth muscle contraction and vasodilation.

Non-allergic anaphylaxis occurs when mast cells degrade due to a non-immune mediator. The clinical outcome is the same as in allergic anaphylaxis.

The management of anaphylaxis is the same regardless of the cause. Adrenaline is the most important drug and should be administered as soon as possible. The recommended doses for adrenaline vary based on age. Other treatments include high flow oxygen and an IV fluid challenge. Corticosteroids and chlorpheniramine are no longer recommended, while non-sedating antihistamines may be considered as third-line treatment after initial stabilization of airway, breathing, and circulation.

Common causes of anaphylaxis include food (such as nuts, which is the most common cause in children), drugs, and venom (such as wasp stings). Sometimes it can be challenging to determine if a patient had a true episode of anaphylaxis. In such cases, serum tryptase levels may be measured, as they remain elevated for up to 12 hours following an acute episode of anaphylaxis.

The Resuscitation Council (UK) provides guidelines for the management of anaphylaxis, including a visual algorithm that outlines the recommended steps for treatment.

According to the 2011 recommendations from the World Health Organization (WHO), HbA1c can now be used as a diagnostic test for diabetes. However, this is only applicable if stringent quality assurance tests are in place and the assays are standardized to criteria aligned with international reference values. Additionally, accurate measurement of HbA1c is only possible if there are no conditions present that could hinder its accuracy.

To diagnose diabetes using HbA1c, a value of 48 mmol/mol (6.5%) is recommended as the cut-off point. It’s important to note that a value lower than 48 mmol/mol (6.5%) does not exclude the possibility of diabetes, as glucose tests are still necessary for a definitive diagnosis.

When using glucose tests, the following criteria are considered diagnostic for diabetes mellitus:
– A random venous plasma glucose concentration greater than 11.1 mmol/l
– A fasting plasma glucose concentration greater than 7.0 mmol/l
– A two-hour plasma glucose concentration greater than 11.1 mmol/l, two hours after consuming 75g of anhydrous glucose in an oral glucose tolerance test (OGTT)

However, there are certain circumstances where HbA1c is not appropriate for diagnosing diabetes mellitus. These include:
– ALL children and young people
– Patients of any age suspected of having Type 1 diabetes
– Patients with symptoms of diabetes for less than two months
– Patients at high risk of diabetes who are acutely ill, such as those requiring hospital admission
– Patients taking medication that may cause a rapid rise in glucose levels, such as steroids or antipsychotics
– Patients with acute pancreatic damage, including those who have undergone pancreatic surgery
– Pregnant individuals
– Presence of genetic, hematologic, and illness-related factors that can influence HbA1c and its measurement.

Patients who have acute otitis media (AOM) and are immunocompromised or systemically unwell should be given an immediate prescription for antibiotics. However, for most patients with AOM, antibiotics are not necessary or can be delayed. An immediate antibiotic prescription should be offered to patients who are systemically unwell but do not require hospitalization, patients at high risk of complications due to underlying health conditions, and patients whose symptoms have persisted for four days or more without improvement. The recommended first choice antibiotic for AOM is amoxicillin.

Further Reading:

Acute otitis media (AOM) is an inflammation in the middle ear accompanied by symptoms and signs of an ear infection. It is commonly seen in young children below 4 years of age, with the highest incidence occurring between 9 to 15 months of age. AOM can be caused by viral or bacterial pathogens, and co-infection with both is common. The most common viral pathogens include respiratory syncytial virus (RSV), rhinovirus, adenovirus, influenza virus, and parainfluenza virus. The most common bacterial pathogens include Streptococcus pneumoniae, Haemophilus influenzae, Moraxella catarrhalis, and Streptococcus pyogenes.

Clinical features of AOM include ear pain (otalgia), fever, a red or cloudy tympanic membrane, and a bulging tympanic membrane with loss of anatomical landmarks. In young children, symptoms may also include crying, grabbing or rubbing the affected ear, restlessness, and poor feeding.

Most children with AOM will recover within 3 days without treatment. Serious complications are rare but can include persistent otitis media with effusion, recurrence of infection, temporary hearing loss, tympanic membrane perforation, labyrinthitis, mastoiditis, meningitis, intracranial abscess, sinus thrombosis, and facial nerve paralysis.

Management of AOM involves determining whether admission to the hospital is necessary based on the severity of systemic infection or suspected acute complications. For patients who do not require admission, regular pain relief with paracetamol or ibuprofen is advised. Decongestants or antihistamines are not recommended. Antibiotics may be offered immediately for patients who are systemically unwell, have symptoms and signs of a more serious illness or condition, or have a high risk of complications. For other patients, a decision needs to be made on the antibiotic strategy, considering the rarity of acute complications and the possible adverse effects of antibiotics. Options include no antibiotic prescription with advice to seek medical help if symptoms worsen rapidly or significantly, a back-up antibiotic prescription to be used if symptoms do not improve within 3 days, or an immediate antibiotic prescription with advice to seek medical advice if symptoms worsen rapidly or significantly.

The first-line antibiotic choice for AOM is a 5-7 day course of amoxicillin. For individuals allergic to or intolerant of penicillin, clarithromycin or erythromycin a 5–7 day course of clarithromycin or erythromycin (erythromycin is preferred in pregnant women).

Poor prognostic factors in schizophrenia include an insidious onset, meaning that the symptoms gradually develop over time without any identifiable precipitating event. Additionally, a family history of schizophrenia, a young age of onset, and a history of previous episodes are also considered to be negative indicators for prognosis. Low intelligence, the absence of affective symptoms, and a loss of emotion are further factors that contribute to a poor prognosis. Delayed treatment and the absence of catatonic symptoms are also associated with a less favorable outcome in individuals with schizophrenia.

Borderline personality disorder is characterized by a range of clinical features. These include having unstable relationships, experiencing undue anger, and having variable moods. Individuals with this disorder often struggle with chronic boredom and may have doubts about their personal identity. They also tend to have an intolerance of being left alone and may engage in self-injury. Additionally, they exhibit impulsive behavior that can be damaging to themselves.

The majority of treatments provided to individuals with sickle cell disease are supportive measures that have limited impact on the underlying pathophysiology of the condition.

Currently, the only approved therapy that can modify the disease is Hydroxyurea. This medication is believed to function by increasing the levels of fetal hemoglobin, which in turn decreases the concentration of HbS within the cells and reduces the abnormal hemoglobin tendency to form polymers.

Hydroxyurea is currently authorized for use in adult patients who experience recurrent moderate-to-severe painful crises (at least three in the past 12 months). Its approval is specifically for reducing the frequency of these painful episodes and the need for blood transfusions.

Diabetic amyotrophy, also referred to as proximal diabetic neuropathy, is the second most prevalent form of diabetic neuropathy. It typically manifests with pain in the buttocks, hips, or thighs and is often initially experienced on one side of the body. The pain may start off as mild and gradually progress or it can suddenly appear, as seen in this particular case. Subsequently, weakness and wasting of the proximal muscles in the lower limbs occur, potentially leading to the patient requiring assistance when transitioning from a seated to a standing position. Reflexes in the affected areas can also be impacted. Fortunately, diabetic amyotrophy can be reversed through effective management of blood sugar levels, physiotherapy, and adopting a healthy lifestyle.

When assessing a patient with epistaxis (nosebleed), it is important to start with a standard ABC assessment, focusing on the airway and hemodynamic status. Even if the bleeding appears to have stopped, it is crucial to evaluate the patient’s airway and circulation.

If active bleeding is still present and there are signs of hemodynamic compromise, immediate resuscitative and first aid measures should be initiated. Epistaxis should be treated as a circulatory emergency, especially in elderly patients, those with clotting disorders or bleeding tendencies, and individuals taking anticoagulants. In these cases, it is necessary to establish intravenous access using at least an 18-gauge (green) cannula and collect blood samples for tests such as full blood count, urea and electrolytes, clotting studies, and blood typing and crossmatching (depending on the amount of blood loss). These patients should be closely monitored in a majors area or a designated observation area, as dislodgement of a blood clot can lead to severe bleeding.

First aid measures to control bleeding include the following steps:
1. The patient should be seated upright with their body tilted forward and their mouth open. Lying down should be avoided, unless the patient feels faint or there are signs of hemodynamic compromise. Leaning forward helps reduce the flow of blood into the back of the throat.
2. The patient should be encouraged to spit out any blood that enters the throat and advised not to swallow it.
3. Firmly pinch the soft, cartilaginous part of the nose, compressing the nostrils for 10-15 minutes. Pressure should not be released, and the patient should breathe through their mouth.
4. If the patient is unable to comply with pinching their own nose, an alternative technique is to ask a relative or staff member to apply external pressure using a device like a swimmer’s nose clip.
5. It is important to dispel the misconception that compressing the bones of the nose will help stop the bleeding. Applying ice to the neck or forehead has not been proven to affect nasal blood flow. However, sucking on an ice cube or applying an ice pack directly to the nose may help reduce nasal blood flow.

If bleeding stops with first aid measures, it may be beneficial to apply a topical antiseptic preparation to reduce crusting and inflammation. Naseptin cream (containing chlorhexidine and neomycin) is commonly used and should be applied to the nostrils four times daily for 10 days.

When evaluating a disturbed or violent patient, your own safety should be the top priority. It is essential that the room you use for the examination has certain features to ensure your well-being. Firstly, there should be an internal inspection window that allows the staff to regularly check on both you and the patient. Additionally, the room should have an unimpeded exit, preferably with an outward opening door that is easy to exit through. It is also crucial to choose a room that is close to well-staffed areas, as this can provide immediate assistance if needed.

It is highly recommended to avoid examining patients in isolated areas, as it significantly increases the risk of harm to the assessor. While the room should be comfortable, it is unnecessary to have excessive furnishings. In fact, having too much furniture and unnecessary equipment can pose a threat, as they can be used as weapons by the patient. Therefore, it is ideal to remove any excess furniture and unnecessary equipment from the room. In this case, an examination couch is not required and should be avoided, as it could potentially be used as a weapon.

A secure locking mechanism is not necessary for the room, and it should be easily accessible to other staff members during the assessment. It is important to note that the room should not be used as a detainment area for the patient, and they should never be locked inside. By following these guidelines and ensuring the room has the recommended features, you can prioritize your safety while examining disturbed or violent patients.

Bier’s block is a regional intravenous anesthesia technique commonly used for minor surgical procedures of the forearm or for reducing distal radius fractures in the emergency department (ED). It is recommended by NICE as the preferred anesthesia block for adults requiring manipulation of distal forearm fractures in the ED.

Before performing the procedure, a pre-procedure checklist should be completed, including obtaining consent, recording the patient’s weight, ensuring the resuscitative equipment is available, and monitoring the patient’s vital signs throughout the procedure. The air cylinder should be checked if not using an electronic machine, and the cuff should be checked for leaks.

During the procedure, a double cuff tourniquet is placed on the upper arm, and the arm is elevated to exsanguinate the limb. The proximal cuff is inflated to a pressure 100 mmHg above the systolic blood pressure, up to a maximum of 300 mmHg. The time of inflation and pressure should be recorded, and the absence of the radial pulse should be confirmed. 0.5% plain prilocaine is then injected slowly, and the time of injection is recorded. The patient should be warned about the potential cold/hot sensation and mottled appearance of the arm. After injection, the cannula is removed and pressure is applied to the venipuncture site to prevent bleeding. After approximately 10 minutes, the patient should have anesthesia and should not feel pain during manipulation. If anesthesia is successful, the manipulation can be performed, and a plaster can be applied by a second staff member. A check x-ray should be obtained with the arm lowered onto a pillow. The tourniquet should be monitored at all times, and the cuff should be inflated for a minimum of 20 minutes and a maximum of 45 minutes. If rotation of the cuff is required, it should be done after the manipulation and plaster application. After the post-reduction x-ray is satisfactory, the cuff can be deflated while observing the patient and monitors. Limb circulation should be checked prior to discharge, and appropriate follow-up and analgesia should be arranged.

There are several contraindications to performing Bier’s block, including allergy to local anesthetic, hypertension over 200 mm Hg, infection in the limb, lymphedema, methemoglobinemia, morbid obesity, peripheral vascular disease, procedures needed in both arms, Raynaud’s phenomenon, scleroderma, severe hypertension and sickle cell disease.

Activated charcoal is a commonly used substance for decontamination in cases of poisoning. Its main function is to adsorb the molecules of the ingested toxin onto its surface.

Activated charcoal is a chemically inert form of carbon. It is a fine black powder that has no odor or taste. It is produced by subjecting carbonaceous matter to high heat, a process known as pyrolysis, and then treating it with a zinc chloride solution to increase its concentration. This process creates a network of pores within the charcoal, giving it a large absorptive area of approximately 3,000 m2/g. This allows it to effectively inhibit the absorption of toxins by up to 50%.

The usual dose of activated charcoal is 50 grams for adults and 1 gram per kilogram of body weight for children. It can be administered orally or through a nasogastric tube. It is important to administer it within one hour of ingestion, and it may be repeated after one hour if necessary.

However, there are certain situations where activated charcoal should not be used. These include cases where the patient is unconscious or in a coma, as there is a risk of aspiration. It should also be avoided if seizures are imminent, as there is a risk of aspiration. Additionally, if there is reduced gastrointestinal motility, activated charcoal should not be used to prevent the risk of obstruction.

Activated charcoal is effective in treating overdose with certain drugs and toxins, such as aspirin, paracetamol, barbiturates, tricyclic antidepressants, digoxin, amphetamines, morphine, cocaine, and phenothiazines. However, it is ineffective in cases of overdose with iron, lithium, boric acid, cyanide, ethanol, ethylene glycol, methanol, malathion, DDT, carbamate, hydrocarbon, strong acids, or alkalis.

There are potential adverse effects associated with the use of activated charcoal. These include nausea and vomiting, diarrhea, constipation, bezoar formation (a mass of undigested material that can cause blockages), bowel obstruction, pulmonary aspiration (inhalation of charcoal into the lungs), and impaired absorption of oral medications or antidotes.

Fluoroquinolones are a rare but acknowledged cause of tendinopathy and spontaneous tendon rupture. It is estimated that tendon disorders related to fluoroquinolones occur in approximately 15 to 20 out of every 100,000 patients. These issues are most commonly observed in individuals who are over the age of 60.

The Achilles tendon is the most frequently affected, although cases involving other tendons such as the quadriceps, peroneus brevis, extensor pollicis longus, the long head of biceps brachii, and rotator cuff tendons have also been reported. The exact underlying mechanism is not fully understood, but it is believed that fluoroquinolone drugs may hinder collagen function and/or disrupt blood supply to the tendon.

There are other risk factors associated with spontaneous tendon rupture, including corticosteroid therapy, hypercholesterolemia, gout, rheumatoid arthritis, long-term dialysis, and renal transplantation.

The therapeutic range for lithium typically falls between 0.4-0.8 mmol/l, although this range may differ depending on the laboratory. In general, the lower end of the range is the desired level for maintenance therapy and treatment in older individuals. Toxic effects are typically observed when levels exceed 1.5 mmol/l.

During the first trimester of pregnancy, the use of trimethoprim is linked to an increased risk of neural tube defects because it antagonizes folate. If it is not possible to use an alternative antibiotic, it is recommended that pregnant women taking trimethoprim also take high-dose folic acid. However, the use of trimethoprim in the second and third trimesters of pregnancy is considered safe.

Below is a list outlining the commonly encountered drugs that have adverse effects during pregnancy:

ACE inhibitors (e.g. ramipril): If given in the second and third trimesters, they can cause hypoperfusion, renal failure, and the oligohydramnios sequence.

Aminoglycosides (e.g. gentamicin): They can cause ototoxicity and deafness.

Aspirin: High doses can lead to first-trimester abortions, delayed onset labor, premature closure of the fetal ductus arteriosus, and fetal kernicterus. However, low doses (e.g. 75 mg) do not pose significant risks.

Benzodiazepines (e.g. diazepam): When given late in pregnancy, they can cause respiratory depression and a neonatal withdrawal syndrome.

Calcium-channel blockers: If given in the first trimester, they can cause phalangeal abnormalities. If given in the second and third trimesters, they can lead to fetal growth retardation.

Carbamazepine: It can cause hemorrhagic disease of the newborn and neural tube defects.

Chloramphenicol: It can cause grey baby syndrome.

Corticosteroids: If given in the first trimester, they may cause orofacial clefts.

Danazol: If given in the first trimester, it can cause masculinization of the female fetuses genitals.

Finasteride: Pregnant women should avoid handling finasteride as crushed or broken tablets can be absorbed through the skin and affect male sex organ development.

Haloperidol: If given in the first trimester, it may cause limb malformations. If given in the third trimester, there is an increased risk of extrapyramidal symptoms in the neonate.

Heparin: It can cause maternal bleeding and thrombocytopenia.

Isoniazid: It can lead to maternal liver damage and neuropathy and seizures in the neonate.

Generally speaking, if a child shows clinical signs of dehydration but does not exhibit shock, it can be assumed that they are 5% dehydrated. On the other hand, if shock is also present, it can be assumed that the child is 10% dehydrated or more. When we say 5% dehydration, it means that the body has lost 5 grams per 100 grams of body weight, which is equivalent to 50 milliliters per kilogram of fluid. Similarly, 10% dehydration implies a fluid loss of 100 milliliters per kilogram of fluid.

In the case of this child, they are 10% dehydrated, which means they have lost 100 milliliters per kilogram of fluid. Considering their weight of 30 kilograms, their estimated fluid loss amounts to 100 multiplied by 30, which equals 3000 milliliters.

Since this child is also in shock, they should receive a fluid bolus of 20 milliliters per kilogram. Therefore, the initial volume of fluid to administer would be 20 multiplied by 30 milliliters, resulting in 600 milliliters.

To summarize the clinical features of dehydration and shock, please refer below:

Dehydration (5%):
– The child appears unwell
– Normal heart rate or tachycardia
– Normal respiratory rate or tachypnea
– Normal peripheral pulses
– Normal or mildly prolonged capillary refill time (CRT)
– Normal blood pressure
– Warm extremities
– Decreased urine output
– Reduced skin turgor
– Sunken eyes
– Depressed fontanelle
– Dry mucous membranes

Clinical shock (10%):
– Pale, lethargic, mottled appearance
– Tachycardia
– Tachypnea
– Weak peripheral pulses
– Prolonged capillary refill time (CRT)
– Hypotension
– Cold extremities
– Decreased urine output
– Decreased level of consciousness

Nelson’s syndrome is a rare condition that occurs many years after a bilateral adrenalectomy for Cushing’s syndrome. It is believed to develop due to the loss of the normal negative feedback control that suppresses high cortisol levels. As a result, the hypothalamus starts producing CRH again, which stimulates the growth of a pituitary adenoma that produces adrenocorticotropic hormone (ACTH).

Only 15-20% of patients who undergo bilateral adrenalectomy will develop this condition, and it is now rarely seen as the procedure is no longer commonly performed.

The symptoms and signs of Nelson’s syndrome are related to the growth of the pituitary adenoma and the increased production of ACTH and melanocyte-stimulating hormone (MSH) from the adenoma. These may include headaches, visual field defects (up to 50% of cases), increased skin pigmentation, and the possibility of hypopituitarism.

ACTH levels will be significantly elevated (usually >500 ng/L). Thyroxine, TSH, gonadotrophin, and sex hormone levels may be low. Prolactin levels may be high, but not as high as with a prolactin-producing tumor. MRI or CT scanning can be helpful in identifying the presence of an expanding pituitary mass.

The treatment of choice for Nelson’s syndrome is trans-sphenoidal surgery.

The percentage of patients who survive to hospital discharge after experiencing an out of hospital cardiac arrest.

Further Reading:

Cardiopulmonary arrest is a serious event with low survival rates. In non-traumatic cardiac arrest, only about 20% of patients who arrest as an in-patient survive to hospital discharge, while the survival rate for out-of-hospital cardiac arrest is approximately 8%. The Resus Council BLS/AED Algorithm for 2015 recommends chest compressions at a rate of 100-120 per minute with a compression depth of 5-6 cm. The ratio of chest compressions to rescue breaths is 30:2.

After a cardiac arrest, the goal of patient care is to minimize the impact of post cardiac arrest syndrome, which includes brain injury, myocardial dysfunction, the ischaemic/reperfusion response, and the underlying pathology that caused the arrest. The ABCDE approach is used for clinical assessment and general management. Intubation may be necessary if the airway cannot be maintained by simple measures or if it is immediately threatened. Controlled ventilation is aimed at maintaining oxygen saturation levels between 94-98% and normocarbia. Fluid status may be difficult to judge, but a target mean arterial pressure (MAP) between 65 and 100 mmHg is recommended. Inotropes may be administered to maintain blood pressure. Sedation should be adequate to gain control of ventilation, and short-acting sedating agents like propofol are preferred. Blood glucose levels should be maintained below 8 mmol/l. Pyrexia should be avoided, and there is some evidence for controlled mild hypothermia but no consensus on this.

Post ROSC investigations may include a chest X-ray, ECG monitoring, serial potassium and lactate measurements, and other imaging modalities like ultrasonography, echocardiography, CTPA, and CT head, depending on availability and skills in the local department. Treatment should be directed towards the underlying cause, and PCI or thrombolysis may be considered for acute coronary syndrome or suspected pulmonary embolism, respectively.

Patients who are comatose after ROSC without significant pre-arrest comorbidities should be transferred to the ICU for supportive care. Neurological outcome at 72 hours is the best prognostic indicator of outcome.