Respiratory (Lab investigations)

Question 1

what is another name for the Bronchial provocation testing?

what is this?

how does it work?

Answer 1

Methacoline challenge

test when you suspect asthma but patient hasn’t presented with symptoms of asthma

The subject inhales a nebulized solution containing methacholine or histamine- cause bronchial smooth muscle constriction in asthmatic patients at much lower doses than in nonasthmatics.

Question 2

what is a positive for methacoline test?

Answer 2

Test is positive: FEV1 falls by >20% at a dose of 16 mg/mL or less

Question 3

what is a cardiopulmonary exercise test?

what is monitored?

Answer 3

test to check for unexplained exertional dyspnea

Minute ventilation, expired oxygen and carbon dioxide tension, heart rate, blood pressure, and respiratory rate are monitored

Question 4

what is oximetry?

Answer 4

monitoring hemoglobin saturation with oxygen.

Question 5

what is Arterial Blood Gas?

Answer 5

whenever a clinically important acid-base disturbance, hypoxemia, or hypercapnia is suspected.

Question 6

what is a Thoracocentesis?

when is it done?

Answer 6

aspiration of fluid from the pleural space by percutaneous insertion of a small bore needle or catheter through the chest wall

you do it if it is exudate, never transudate

Question 7

what complications can arise from a thoracocentesis?

Answer 7

• Pneumothorax,
• hemothorax,
• P. edema,
• Infections etc

Question 8

thoracocentesis is used to treat what?

Answer 8

pleural effusion