As received from the complainant: "near-cardiac arrest (pulseless electrical activity) due to faulty valve in a disposable jackson-rees breathing circuit, leading to thoracic tamponade physiology: the patient was moved from or table to stretcher after aortic valve and hemi-aortic root replacement surgery.A king systems disposable jackson-rees circuit (ref 61743z) with 8 l/m oxygen flow was attached to the patient's endotracheal tube (ett).The patient was breathing spontaneously.The pop-off valve was adjusted to be partially open (the slide switch was not fully to the left).Within approximately 1 min, the patient had a brief but progressive episode of bradycardia, hypotension, and ultimately pulseless electrical activity.The reservoir bag was not visible to the anesthesiologist (tucked to the left of the patient's head).As the team prepared to transfer the patient back to the or table urgently, the j-r circuit spontaneously disconnected from the ett.The anesthesiologist found that its pop-off valve was fully closed (judged by looking directly at the hemicircular vent orifice), even though the slider controlling the valve was not in the fully closed position.After manipulating the slider to open the valve fully as confirmed visually by inspecting the orifice, the circuit was reattached to the ett.Bilateral and equal breath sounds were auscultated.The patient's hemodynamics promptly recovered.The patient did not manifest any lung injury, likely due to the high-volume/low-pressure reservoir coupled with the fortuitous disconnection of the circuit from the ett.".
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