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Question 1
Incorrect
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A 72 year old male presents to the emergency department complaining of shortness of breath. The patient has had a tracheostomy for several years after being on a ventilator for an extended period of time due to a severe head injury. You provide high flow oxygen and remove the inner tube of the tracheostomy. However, there is no improvement in the patient's condition. What would be the most suitable course of action for managing this patient?
Your Answer: Deflate the cuff
Correct Answer: Pass suction catheter
Explanation:If a patient with breathing difficulty does not show improvement after removing the inner tracheostomy tube, it is recommended to use a suction catheter to remove any secretions. This can help clear any blockage caused by secretions or debris in or near the tube. If this does not improve the situation, the next step would be to deflate the cuff. If deflating the cuff stabilizes or improves the patient’s condition, it suggests that air can flow around the tube within the airway, indicating that the tracheostomy tube may be obstructed or displaced.
Further Reading:
Patients with tracheostomies may experience emergencies such as tube displacement, tube obstruction, and bleeding. Tube displacement can occur due to accidental dislodgement, migration, or erosion into tissues. Tube obstruction can be caused by secretions, lodged foreign bodies, or malfunctioning humidification devices. Bleeding from a tracheostomy can be classified as early or late, with causes including direct injury, anticoagulation, mucosal or tracheal injury, and granulation tissue.
When assessing a patient with a tracheostomy, an ABCDE approach should be used, with attention to red flags indicating a tracheostomy or laryngectomy emergency. These red flags include audible air leaks or bubbles of saliva indicating gas escaping past the cuff, grunting, snoring, stridor, difficulty breathing, accessory muscle use, tachypnea, hypoxia, visibly displaced tracheostomy tube, blood or blood-stained secretions around the tube, increased discomfort or pain, increased air required to keep the cuff inflated, tachycardia, hypotension or hypertension, decreased level of consciousness, and anxiety, restlessness, agitation, and confusion.
Algorithms are available for managing tracheostomy emergencies, including obstruction or displaced tube. Oxygen should be delivered to the face and stoma or tracheostomy tube if there is uncertainty about whether the patient has had a laryngectomy. Tracheostomy bleeding can be classified as early or late, with causes including direct injury, anticoagulation, mucosal or tracheal injury, and granulation tissue. Tracheo-innominate fistula (TIF) is a rare but life-threatening complication that occurs when the tracheostomy tube erodes into the innominate artery. Urgent surgical intervention is required for TIF, and management includes general resuscitation measures and specific measures such as bronchoscopy and applying direct digital pressure to the innominate artery.
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This question is part of the following fields:
- Respiratory
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Question 2
Correct
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A 10-year-old girl presents with a history of a persistent cough that has been present for the past three weeks. The cough occurs in short bursts with an inspiration followed by a series of hacking coughs. She occasionally vomits after coughing. She mentions that the cough is worse at night and that she has fainted once during a coughing fit. She is otherwise healthy, and her vaccinations are up-to-date.
Upon examination, her chest is clear, but there are three small subconjunctival hemorrhages and some petechiae on her face. A complete blood count reveals a lymphocyte count of 22 x 109/l (1.3-3.5 x 109/l).
What is the SINGLE most likely diagnosis?Your Answer: Pertussis
Explanation:This presentation strongly indicates a diagnosis of whooping cough, also known as pertussis. Whooping cough is a respiratory infection caused by the bacteria Bordetella pertussis. It is transmitted through respiratory droplets and has an incubation period of about 7-21 days. The disease is highly contagious and can be transmitted to around 90% of close household contacts.
The clinical course of whooping cough can be divided into two stages. The first stage is called the catarrhal stage, which resembles a mild respiratory infection with low-grade fever and symptoms similar to a cold. A cough may be present, but it is usually mild and not as severe as in the second stage. The catarrhal stage typically lasts for about a week.
The second stage is known as the paroxysmal stage. During this stage, the characteristic paroxysmal cough develops as the symptoms from the catarrhal stage start to improve. The coughing occurs in spasms, often preceded by an inspiratory whoop sound, followed by a series of rapid coughs. Vomiting may occur, and patients may develop subconjunctival hemorrhages and petechiae. Patients generally feel well between coughing spasms, and there are usually no abnormal chest findings. This stage can last up to 3 months, with a gradual recovery over this period. The later stages of this stage are sometimes referred to as the convalescent stage.
Complications of whooping cough can include secondary pneumonia, rib fractures, pneumothorax, hernias, syncopal episodes, encephalopathy, and seizures. It is important to note that a history of vaccination does not guarantee immunity, as it only provides about 95% protection.
The presence of marked lymphocytosis in this case also supports a diagnosis of pertussis, as it is a common finding. A lymphocyte count greater than 20 x 109/l is highly suggestive of the disease.
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This question is part of the following fields:
- Respiratory
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Question 3
Incorrect
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A 6-month-old girl is brought by her parents to see her pediatrician due to a history of fever, cough, and difficulty breathing. The pediatrician diagnoses her with acute bronchiolitis and calls the Emergency Department to discuss whether the child will require admission.
What would be a reason for referring the child to the hospital?Your Answer: Respiratory rate of 50 breaths/minute
Correct Answer:
Explanation:Bronchiolitis is a respiratory infection that primarily affects infants aged 2 to 6 months. It is typically caused by a viral infection, with respiratory syncytial virus (RSV) being the most common culprit. RSV infections are most prevalent during the winter months, from November to March. In fact, bronchiolitis is the leading cause of hospitalization among infants in the UK.
The symptoms of bronchiolitis include poor feeding (consuming less than 50% of their usual intake in the past 24 hours), lethargy, a history of apnea, a respiratory rate exceeding 70 breaths per minute, nasal flaring or grunting, severe chest wall recession, cyanosis (bluish discoloration of the skin), and low oxygen saturation levels. For children aged 6 weeks and older, oxygen saturation levels below 90% indicate a need for medical attention. For babies under 6 weeks or those with underlying health conditions, oxygen saturation levels below 92% require medical attention.
To confirm the diagnosis of bronchiolitis, a nasopharyngeal aspirate can be taken for rapid testing of RSV. This test is useful in preventing unnecessary further testing and allows for the isolation of the infected infant.
Most infants with bronchiolitis experience a mild, self-limiting illness that does not require hospitalization. Treatment primarily focuses on supportive measures, such as ensuring adequate fluid and nutritional intake and controlling the infant’s temperature. The illness typically lasts for 7 to 10 days.
However, hospital referral and admission are recommended in cases of poor feeding, lethargy, a history of apnea, a respiratory rate exceeding 70 breaths per minute, nasal flaring or grunting, severe chest wall recession, cyanosis, and oxygen saturation levels below 94%. If hospitalization is necessary, treatment involves supportive measures, supplemental oxygen, and nasogastric feeding as needed. There is limited or no evidence supporting the use of antibiotics, antivirals, bronchodilators, corticosteroids, hypertonic saline, or adrenaline nebulizers for the treatment of bronchiolitis.
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This question is part of the following fields:
- Respiratory
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Question 4
Correct
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A 35-year-old man comes in with a cough, chest discomfort, and difficulty breathing. After conducting a clinical evaluation, you determine that he has community-acquired pneumonia. He has no significant medical history and no reported drug allergies.
What is the most suitable antibiotic to prescribe in this situation?Your Answer: Amoxicillin
Explanation:This patient is displaying symptoms and signs that are consistent with community-acquired pneumonia (CAP). The most common cause of CAP in an adult patient who is otherwise in good health is Streptococcus pneumoniae.
When it comes to treating community-acquired pneumonia, the first-line antibiotic of choice is amoxicillin. According to the NICE guidelines, patients who are allergic to penicillin should be prescribed a macrolide (such as clarithromycin) or a tetracycline (such as doxycycline).
For more information, you can refer to the NICE guidelines on the diagnosis and management of pneumonia in adults.
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This question is part of the following fields:
- Respiratory
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Question 5
Incorrect
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A child presents with a severe acute asthma attack. After a poor response to their initial salbutamol nebulizer, you administer a second nebulizer that also contains ipratropium bromide. How long would it take for the ipratropium bromide to have its maximum effect?
Your Answer: 15-30 minutes
Correct Answer: 30-60 minutes
Explanation:Ipratropium bromide is a medication that falls under the category of antimuscarinic drugs. It is commonly used to manage acute asthma and chronic obstructive pulmonary disease (COPD). While it can provide short-term relief for chronic asthma, it is generally recommended to use short-acting β2 agonists as they act more quickly and are preferred.
According to the guidelines set by the British Thoracic Society (BTS), nebulized ipratropium bromide (0.5 mg every 4-6 hours) can be added to β2 agonist treatment for patients with acute severe or life-threatening asthma, or those who do not respond well to initial β2 agonist therapy.
For mild cases of chronic obstructive pulmonary disease, aerosol inhalation of ipratropium can be used for short-term relief, as long as the patient is not already using a long-acting antimuscarinic drug like tiotropium. The maximum effect of ipratropium occurs within 30-60 minutes after use, and its bronchodilating effects can last for 3-6 hours. Typically, treatment with ipratropium is recommended three times a day to maintain bronchodilation.
The most common side effect of ipratropium bromide is dry mouth. Other potential side effects include constipation, cough, paroxysmal bronchospasm, headache, nausea, and palpitations. It is important to note that ipratropium can cause urinary retention in patients with prostatic hyperplasia and bladder outflow obstruction. Additionally, it can trigger acute closed-angle glaucoma in susceptible patients.
For more information on the management of asthma, it is recommended to refer to the BTS/SIGN Guideline on the Management of Asthma.
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This question is part of the following fields:
- Respiratory
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Question 6
Correct
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A 60-year-old woman presents with a persistent cough and increasing difficulty breathing. She also complains of muscle aches and occasional joint pain, particularly in her knees and hips. She has a 40-pack-year smoking history. During the examination, you observe fine crackling sounds in the lower parts of her lungs when she exhales. Lung function testing reveals a decrease in the forced vital capacity (FVC) and the forced expiratory volume in one second (FEV1), but a preserved FEV1/FVC ratio. A photo of her hands is provided below:
What is the SINGLE most likely underlying diagnosis?Your Answer: Idiopathic pulmonary fibrosis
Explanation:This patient’s clinical presentation is consistent with a diagnosis of idiopathic pulmonary fibrosis. The typical symptoms of idiopathic pulmonary fibrosis include a dry cough, progressive breathlessness, arthralgia and muscle pain, finger clubbing (seen in 50% of cases), cyanosis, fine end-expiratory bibasal crepitations, and right heart failure and cor pulmonale in later stages.
Finger clubbing, which is prominent in this patient, can also be caused by bronchiectasis and tuberculosis. However, these conditions would not result in a raised FEV1/FVC ratio, which is a characteristic feature of a restrictive lung disorder.
In restrictive lung disease, the FEV1/FVC ratio is typically normal, around 70% predicted, while the FVC is reduced to less than 80% predicted. Both the FVC and FEV1 are generally reduced in this condition. The ratio can also be elevated if the FVC is reduced to a greater extent.
It is important to note that smoking is a risk factor for developing idiopathic pulmonary fibrosis, particularly in individuals with a history of smoking greater than 20 pack-years.
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This question is part of the following fields:
- Respiratory
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Question 7
Incorrect
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A 35-year-old woman comes to the clinic complaining of a persistent dry cough and fever for the past few days. She has noticed that her cough does not produce any phlegm. Today, she has also experienced multiple episodes of diarrhea and has developed sharp chest pain on both sides. She mentions feeling short of breath, especially when she exerts herself. She works as a Jacuzzi and whirlpool installer and smokes 10 cigarettes per day.
What is the SINGLE most probable causative organism in this scenario?Your Answer: Mycoplasma pneumoniae
Correct Answer: Legionella pneumophila
Explanation:Legionella pneumophila, a Gram-negative bacterium, can be found in natural water supplies and soil. It is responsible for causing Legionnaires’ disease, a serious illness. Outbreaks of this disease have been associated with poorly maintained air conditioning systems, whirlpool spas, and hot tubs.
The pneumonic form of Legionnaires’ disease presents with specific clinical features. Initially, there may be a mild flu-like prodrome lasting for 1-3 days. A non-productive cough, occurring in approximately 90% of cases, is also common. Pleuritic chest pain, haemoptysis, headache, nausea, vomiting, diarrhoea, and anorexia are other symptoms that may be experienced.
Fortunately, Legionella pneumophila infections can be effectively treated with macrolide antibiotics like erythromycin, or quinolones such as ciprofloxacin. Tetracyclines, including doxycycline, can also be used as a treatment option.
While the majority of Legionnaires’ disease cases are caused by Legionella pneumophila, there are several other species of Legionella that have been identified. One such species is Legionella longbeachae, which is less commonly encountered. It is primarily found in soil and potting compost and has been associated with outbreaks of Pontiac fever, a milder variant of Legionnaires’ disease that does not primarily affect the respiratory system.
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This question is part of the following fields:
- Respiratory
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Question 8
Correct
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A 32-year-old individual presents with a sudden worsening of asthma symptoms. You conduct an arterial blood gas test, and their PaCO2 level is 6.3 kPa.
How would you categorize this asthma exacerbation?Your Answer: Near-fatal asthma
Explanation:This individual has presented with an episode of acute asthma. Their PaCO2 levels are elevated at 6.3 kPa, indicating a near-fatal exacerbation. According to the BTS guidelines, acute asthma can be classified as moderate, acute severe, life-threatening, or near-fatal.
Moderate asthma is characterized by increasing symptoms and a PEFR (peak expiratory flow rate) of 50-75% of the best or predicted value. There are no features of acute severe asthma present in this classification.
Acute severe asthma can be identified by any one of the following criteria: a PEFR of 33-50% of the best or predicted value, a respiratory rate exceeding 25 breaths per minute, a heart rate surpassing 110 beats per minute, or the inability to complete sentences in one breath.
Life-threatening asthma is determined by any one of the following indicators: a PEFR below 33% of the best or predicted value, an SpO2 (oxygen saturation) level below 92%, a PaO2 (partial pressure of oxygen) below 8 kPa, normal PaCO2 levels (ranging from 4.6-6.0 kPa), a silent chest, cyanosis, poor respiratory effort, arrhythmia, exhaustion, altered conscious level, or hypotension.
Near-fatal asthma is characterized by a raised PaCO2 level and/or the need for mechanical ventilation with elevated inflation pressures.
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This question is part of the following fields:
- Respiratory
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Question 9
Correct
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A 35-year-old woman with no significant medical history complains of chest pain on the right side and difficulty breathing. She does not take any medications regularly and has no known allergies to drugs. She has been a heavy smoker for the past six years.
What is the SINGLE most probable diagnosis?Your Answer: Pneumothorax
Explanation:The risk of primary spontaneous pneumothorax is associated with smoking tobacco and increases as the duration of exposure and daily consumption rise. The changes caused by smoking in the small airways may contribute to the development of local emphysema, leading to the formation of bullae. In this case, the patient does not have any clinical features or significant risk factors for the other conditions mentioned. Therefore, primary spontaneous pneumothorax is the most probable diagnosis.
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This question is part of the following fields:
- Respiratory
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Question 10
Incorrect
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A 25-year-old woman comes in with a sudden worsening of her asthma symptoms. Her heart rate is 115 bpm, respiratory rate 28/min, and her oxygen levels are at 89% when breathing normally. She is feeling fatigued, and her breathing is weak. When listening to her chest, there are no sounds heard.
Which of the following medication dosages could be given as part of her treatment?Your Answer: Salbutamol 5 mg via air-driven nebuliser
Correct Answer: Aminophylline 5 mg/kg IV loading dose over 20 minutes
Explanation:This patient is displaying symptoms of life-threatening asthma, and the only available option for treatment with the correct dosage is an aminophylline loading dose.
The signs of acute severe asthma in adults include a peak expiratory flow (PEF) of 33-50% of the best or predicted value, a respiratory rate of over 25 breaths per minute, a heart rate of over 110 beats per minute, and an inability to complete sentences in one breath.
On the other hand, life-threatening asthma is characterized by a PEF of less than 33% of the best or predicted value, a blood oxygen saturation level (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.
The recommended drug doses for adult acute asthma are as follows: 5 mg of salbutamol delivered through an oxygen-driven nebulizer, 500 mcg of ipratropium bromide via an oxygen-driven nebulizer, 40-50 mg of prednisolone taken orally, 100 mg of hydrocortisone administered intravenously, and 1.2-2 g of magnesium sulfate given intravenously over a period of 20 minutes. Intravenous salbutamol may be considered (250 mcg administered slowly) only when inhaled therapy is not possible, such as in a patient receiving bag-mask ventilation.
According to the current ALS guidelines, IV aminophylline can be considered in cases of severe or life-threatening asthma, following consultation with a senior medical professional. If used, a loading dose of 5 mg/kg should be administered over 20 minutes, followed by a continuous infusion of 500-700 mcg/kg/hour. It is important to maintain serum theophylline levels below 20 mcg/ml to prevent toxicity.
For more information, please refer to the BTS/SIGN Guideline on the Management of Asthma.
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This question is part of the following fields:
- Respiratory
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