Injection port valve malfunction!

Malfunction of an adjustable pressure limit valve.

EDITOR: We report the malfunction of an adjustable pressure limit (APL) valve on a KION (Siemens, SiemensElema AB, Solna, Stockholm, Sweden) anaesthesia workstation which occurred twice. The first time, the malfunction was detected during the pre-use manual check, but not by the automatic self-check. The second time, the malfunction occurred intermittently during ventilation of a patient but it...

Malfunction of adjustable pressure limiting valve

An Improved Method for Injection of Bolus Doses of Drugs into the Perfusion Circuit of Isolated Perfused Rat Kidney Utilizing a Six-port Injection Valve

The isolated perfused rat kidney experiment was introduced in 1959 for studying the regulation of renal blood flow and is recognized as a valuable preparation for studying physiological and biochemical aspects of renal function such as hemodynamics, glomerular filtration rate (GFR) and overall handling of fluids. Dose-response curves are obtained by injection of bolus doses of drugs into the pe...

Malfunction of the Expiratory Valve During Spontaneous Ventilation.

The integrity of inspiratory and expiratory unidirectional valves is very important in the normal functioning of an anesthetic circle breathing system. We describe our experience of an emergency manipulation of a ceramic valve disk of a circle breathing system (Dräger Fabius GS, Dräger Medical Inc) that altered its characteristics and led to rebreathing only during spontaneous ventilation.

Malfunction of the Mitral Valve Prosthesis (Cutter-Smeloff)

Three cases of intermittent obstruction of the mitral prosthesis (Cutter-Smeloff) due to ball variance have been reported. The typical findings were marked variation in the arterial pulse and the intensity of the mitral closing sound and intermittent absence of the opening click. The phonocardiography revealed varying intervals from aortic closing sound to the opening click (A2 OC interval). He...