When do you use a bain circuit?
– Bain circuits use a high fresh gas flow to deliver anesthetic gases to the patient’s airway and to wash out the exhaled carbon dioxide. – An inner tube delivers fresh gases and an outer corrugated tube serves as the outlet for exhaled gases. A Bain circuit ensures that there is no re-breathing of the exhaled gases.
How do you find the functional integrity of a Bain circuit?
For checking integrity of inner tube of Bains system, a test is performed by setting a low flow on the oxygen flowmeter and occluding the inner tube with a finger or barrel of a small syringe at the patient end while observing the flow meter indicator.
How much dead space is in anesthesia circuit?
Awake, patient physiologic dead space would be 7 to 10.5 ml, leaving 13 to 19.5 ml to participate in alveolar ventilation. Anesthetized, alveolar ventilation drops to 7 to 10.5 ml.
What are the 4 types of dead space ventilation?
There are three different types of dead space; anatomic, alveolar, and equipment/mechanical. Dead space ventilation involves that component of the respiratory gases that does not participate in gas exchange.
What increases dead space in lungs?
Mechanical Ventilation: Tubing from the ventilator increases dead space volume by adding volume to the effective space, not participating in gas exchange. PEEP: Excessive PEEP can over-distend alveoli and result in lung barotrauma, increasing the dead space volume.
What do you need to know about the anesthesia machine?
Proper monitor functioning includes visual and audible alarm signals that function as designed. Verify that pressure is adequate on the spare oxygen cylinder mounted on the anesthesia machine. Anesthesia delivery systems rely on a supply of oxygen for various machine functions.
When to use high and low anesthetic agent alarms?
High and low anesthetic agent alarms are useful to help prevent over- or under-dosage of anesthetic vapor. Use of these alarms is encouraged and they should be set to the appropriate limits and enabled. Verify that there are no leaks in the gas supply lines between the flowmeters and the common gas outlet.
How often should gas be checked in anesthesia machine?
A minimum gas supply pressure is required for proper function of the anesthesia delivery system. Gas supplied from a central source can fail for a variety of reasons. Therefore the pressure in the piped gas supply should be checked at least once daily.
How does the Bain circuit work like a T-piece?
Essentially, the Bain circuit functions in the same way as the T-piece, except that the tube supplying fresh gas to the patient is located inside the reservoir tube. Inspiration -The patient inspires fresh gas from the outer reservoir tube. Expiration – The patient expires into the reservoir tube.