It has been reported by the clinical personal: "a post-operative cardiac surgery patient needing external cardiac pacing via an osypka pace 203h pacing box.During use, the pacing box showed low battery.Battery change procedure started which entails live swapping of the battery while the device provides approx.30 seconds (minimum) of internal reserve power.Nurse swapped expired battery for a new(out the packet) duracell plus 6lr61 (pp3) 9 volt.The pacing box did not 'recognise' the new battery.A second new battery was swapped into the pacing box, again the new battery was not 'recognised'.A third new battery was swapped and this time it did work.The nurse swapping the batteries has experience of doing this procedure many times.The pacing box never powered down so the patient came to no harm.If not for the quick intervention of the nurse the patient may have had a cardiac arrest.Similar battery issues experienced recently with other devices.Also, a few weeks ago an entire box of new 9v batteries was found to be not working.".
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