A Failure of the Chain-Link Mechanism on the Ohmeda Excel 210 Anesthetic Machine

Cheng, Christine J. C.; Garewal, Davinder S.

doi:10.1097/00000539-200104000-00021

Cited by 5 publications

(1 citation statement)

References 4 publications

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“…Fault in the chain-link mechanism of Ohmeda Excel 210 SE where loosening of the stop screw which placed over the O 2 flow control knob contributed to hypoxic gas delivery. [121314] Faulty interface between gear wheels of O 2 and N 2 O flow meters in ageing machines contributed to failure of the flow proportionating devices while defective rubber seal of flow meter control tube was responsible for hypoxic gas delivery. [1516]…”

Section: Hazards Of Anaesthesia Machinesmentioning

confidence: 99%

Anaesthesia machine: Checklist, hazards, scavenging

Umesh

Prabhu

2013

Indian J Anaesth

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From a simple pneumatic device of the early 20th century, the anaesthesia machine has evolved to incorporate various mechanical, electrical and electronic components to be more appropriately called anaesthesia workstation. Modern machines have overcome many drawbacks associated with the older machines. However, addition of several mechanical, electronic and electric components has contributed to recurrence of some of the older problems such as leak or obstruction attributable to newer gadgets and development of newer problems. No single checklist can satisfactorily test the integrity and safety of all existing anaesthesia machines due to their complex nature as well as variations in design among manufacturers. Human factors have contributed to greater complications than machine faults. Therefore, better understanding of the basics of anaesthesia machine and checking each component of the machine for proper functioning prior to use is essential to minimise these hazards. Clear documentation of regular and appropriate servicing of the anaesthesia machine, its components and their satisfactory functioning following servicing and repair is also equally important. Trace anaesthetic gases polluting the theatre atmosphere can have several adverse effects on the health of theatre personnel. Therefore, safe disposal of these gases away from the workplace with efficiently functioning scavenging system is necessary. Other ways of minimising atmospheric pollution such as gas delivery equipment with negligible leaks, low flow anaesthesia, minimal leak around the airway equipment (facemask, tracheal tube, laryngeal mask airway, etc.) more than 15 air changes/hour and total intravenous anaesthesia should also be considered.

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