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Safety Features of the Anaesthetic Machine
Published in Lara Wijayasiri, Kate McCombe, Paul Hatton, David Bogod, The Primary FRCA Structured Oral Examination Study Guide 1, 2017
Lara Wijayasiri, Kate McCombe, Paul Hatton, David Bogod
Adjustable pressure-limiting valveAllows excess gas to escape when a preset pressure is exceeded, thereby reducing risk of barotrauma to the patient.
Baska mask versus endotracheal tube in laparoscopic cholecystectomy surgery: a prospective randomized trial
Published in Expert Review of Medical Devices, 2021
Ching Choe Ng, Mohammad Hafizshah Bin Sybil Shah, Sook Hui Chaw, Marzida Binti Mansor, Wei Keang Tan, Jun Kit Koong, Chew Yin Wang
For the Baska group, placement tests (gel displacement, suprasternal notch tap, and gastric tube insertion) were performed to assess correct placement [15]. Subsequently, performance tests, such as the maximum minute ventilation test [15] and oropharyngeal leak pressure (OLP) test, were performed to evaluate the suitability to proceed with laparoscopic surgery. To measure OLP, the adjustable pressure-limiting valve was closed to allow a maximum pressure of 40 cmH2O with a fresh gas flow of 3 L/min of oxygen. OLP was recorded as the airway pressure at equilibrium or when an audible air leak could be heard from the patient’s mouth [16]. Fiberoptic bronchoscopy (3.7-mm bronchoscope, Karl Storz, Tuttlingen, Germany) was performed through the Baska Mask to determine the glottic view using the Brimacombe scoring system [17].
Randomized comparison of the Baska FESS mask and the LMA Supreme in different head and neck positions
Published in Expert Review of Medical Devices, 2018
Li Lian Foo, Ina Ismiarti Shariffuddin, Sook Hui Chaw, Pui Kuan Lee, Chong En Lee, Yi Shang Chen, Lucy Chan
To measure the OLP, the adjustable pressure limiting valve was closed to allow a maximum pressure of 40 cmH2O with a fresh gas flow of 3 l/min of oxygen. OLP was taken as the airway pressure at equilibrium or when there was an audible air leak when listening over the mouth. A Size 14 FR gastric tube was inserted through the gastric drain outlet after pre-lubrication with a water soluble gel. Ease of insertion was graded 1–3 (1 = easy, 2 = moderate, 3 = difficult). Confirmation of gastric tube placement was by auscultation for injected air over the epigastrium and aspiration of gastric contents. Gastric tube insertion time was recorded. Gastric decompression was done and the amount of fluid aspirated was recorded.