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WorksheetsRespiratory physiology
Total questions: 10
Worksheet time: 10mins
This is considered the best tool for evaluating the lungs’ efficiency in oxygenating the arterial blood. It is the only index of oxygenation that takes into account the contribution of mixed venous blood to arterial oxygenation.
Calculation of the shunt fraction
Assessment of Physiologic dead space
Ratio of Ventilation/Perfusion Mismatch
Forced Vital Capacity Maneuver
This ventilatory muscle perform most of muscle work during non-strenuous breathing
sternocleidomastois muscle
Intercostal muscle
. Diaphragm
Cervical strap muscles
The lung parenchyma of the lung is divided into 3 functional airway division. The conductive, the transitional and respiratory division. Which of the following statement is correct?
The conductive airways allow basic gas transport without gas exchange
The transitional airways are the respiratory bronchioles that allows bulk movement
The primary function of the smallest respiratory airway is gas exchange
All are correct
Only C is correct
In the West Zone Diagram of Distribution of Blood Flow in the isolated lung,
PA>Ppa>PV in Zone I means Pulmonary Alveolar Pressure exceeds Pulmonary arterial pressure, and no flow occurs because the vessels are collapsed
Ppa>PA>PV in Zone II means Pulmonary Arterial Pressure exceeds Alveolar Pressure but Alveolar Pressure exceeds Pulmonary Venous pressure
Ppa>PpV>PA in Zone III means Pulmonary Venous pressure exceeds Alveolar Pressure and flow is determined by the Arterial venous presser difference
All are correct
None is correct
Marked impaired Pulmonary function is likely in the following patients:
Any chronic disease that involves the lung
Smoking history
Chest wall and spinal deformities
Morbid obesity
all of the above
Physiologic dead space consists of anatomic and alveolar dead space. Clinical conditions that modify anatomic dead space include the following, except:
Tracheal intubation
Tracheostomy
Large lengths of ventilator tubings between the tracheal tube and Ventilator Y piece
Inspiratory / expiratory limb of the Anesthesia circle system
Disease produces little change in anatomic dead space, physiologic dead space is primarily influenced by changes in the alveolar dead space. The most common etiology of acutely increased physiologic dead space is:
Abrupt decrease in cardiac output
Pulmonary embolism interfering with the pulmonary blood flow
Vasconstriction induced by vasoactive substances
All are correct
None is correct
. In the Preoperative Assessment of Patients with smoking history, the following statement is true except,
Advise patient to stop smoking 2months prior to elective operations to maximize their benefit
Cessation of smoking 12-24hours pre-operatively can decrease the carbon monoxide concentration to near normal
There is no consensus on the minimal or optimal duration of pre-operative smoking abstinence
Several months of smoking abstinence is required to return sputum clearance to normal
Normalization of the mucociliary function requires 2-3weeks of abstinence from smoking, during which time sputum production decreases
There are 3 etiologies of hyperventilation: arterial hypoxemia, metabolic acidemia, and central etiologies. The following are examples of central etiology of hyperventilation
Intracranial hypertension
Hepatic cirrhosis
Anxiety
Pharmacologic agents
All of the above
Which of the following factors does not influence the functional residual capacity (FRC)?
Advanced age
Body habitus
Sex
Posture
Restrictive pulmonary disease
