Anaesthetic machine leak not detected by the universal leak test

Anaesthesia ◽  
2019 ◽  
Vol 74 (4) ◽  
pp. 545-546 ◽  
Author(s):  
J. D. Parker
Keyword(s):  
Anaesthetic Machine ◽  
Leak Test

Selective Corrosion of brazed joint between BNi-2 filler metal and stainless steel 316

1996 ◽  
Vol 54 ◽  
pp. 218-219
Author(s):  
H. S. Kim ◽  
R. U. Lee
Keyword(s):  
Stainless Steel ◽  
Filler Metal ◽  
Surface Preparation ◽  
Optical Microscope ◽  
Heating Element ◽  
Incomplete Fusion ◽  
Atmospheric Conditions ◽  
Leak Test ◽  
High Temperature Side ◽  
Inconel 600

A heating element/electrical conduit assembly used in the Orbiter Maneuvering System failed a leak test during a routine refurbishment inspection. The conduit, approximately 100 mm in length and 12 mm in diameter, was fabricated from two tubes and braze-joined with a sleeve. The tube on the high temperature side (heating element side) and the sleeve were made of Inconel 600 and the other tube was stainless steel (SS) 316. For the filler metal, a Ni-Cr-B brazing alloy per AWS BNi-2, was used. A Helium leak test spotted the leak located at the joint between the sleeve and SS 316 tubing. This joint was dissected, mounted in a plastic mold, polished, and examined with an optical microscope. Debonding of the brazed surfaces was noticed, more pronounced toward the sleeve end which was exposed to uncontrolled atmospheric conditions intermittently. Initially, lack of wetting was suspected, presumably caused by inadequate surface preparation or incomplete fusion of the filler metal. However, this postulation was later discarded based upon the following observations: (1) The angle of wetting between the fillet and tube was small, an indication of adequate wetting, (2) the fillet did not exhibit a globular microstructure which would be an indication of insufficient melting of the filler metal, and (3) debonding was intermittent toward the midsection of the sleeve.

Anaesthetic machine checklists 2

Anaesthesia ◽  
2001 ◽  
Vol 56 (10) ◽  
pp. 1007-1008
Author(s):  
P. Bhargava ◽  
T. Dexter
Keyword(s):  
Anaesthetic Machine

Cuff-leak test combined with interventional bronchoscopy benefits early extubation for patients who received tarp surgery

2016 ◽  
Vol 26 (3) ◽  
pp. 840-846
Author(s):  
Jian-qiang Dai ◽  
Wei-Feng Tu ◽  
Qing-shui Yin ◽  
Hong Xia ◽  
Guo-dong Zheng ◽  
...  
Keyword(s):  
Early Extubation ◽  
Leak Test ◽  
Interventional Bronchoscopy ◽  
Cuff Leak

scholarly journals The endotracheal tube air leak test does not predict extubation outcome in critically ill pediatric patients

2008 ◽  
Vol 9 (5) ◽  
pp. 490-496 ◽  
Author(s):  
Angela T. Wratney ◽  
Daniel Kelly Benjamin ◽  
Anthony D. Slonim ◽  
James He ◽  
Donna S. Hamel ◽  
...  
Keyword(s):  
Endotracheal Tube ◽  
Critically Ill ◽  
Pediatric Patients ◽  
Air Leak ◽  
Leak Test ◽  
Air Leak Test ◽  
Extubation Outcome

Detection of a Tracheal Obstruction Caused by a Retrosternal Goiter by the Use of a Cuff Leak Test

2000 ◽  
Vol 90 (4) ◽  
pp. 1002 ◽  
Author(s):  
Torsten Meier ◽  
Thorsten Leibecke ◽  
Jan Schumacher ◽  
Klaus Berger ◽  
Karl F. Klotz
Keyword(s):  
Leak Test ◽  
Tracheal Obstruction ◽  
Retrosternal Goiter ◽  
Cuff Leak

scholarly journals A NEW MICROPROCESSOR-CONTROLLED ANAESTHETIC MACHINE

1989 ◽  
Vol 62 (4) ◽  
pp. 445-455 ◽  
Author(s):  
M.K. SYKES ◽  
B.R. SUGG ◽  
C.E.W. HAHN ◽  
R.K. JACKSON ◽  
E. PALAYIWA
Keyword(s):  
Anaesthetic Machine
Sign in / Sign up

Export Citation Format

Share Document