Premature recovery from general anaesthesia in an adult Limousin bull

This case report describes the premature and unanticipated recovery of a bull from general anaesthesia for penile surgery. Retrospective review revealed: (i) the elements of case management that contributed to this critical event; and (ii) other measures that allowed prompt control, thus minimising risk to the subject and personnel. The case highlights the challenges of monitoring depth of anaesthesia in large ruminants and illustrates that non‐surgical stimuli such as hoisting can be equally, if not more, stimulating than surgery itself. Finally, practical recommendations are made to: (i) reduce the likelihood of this problem recurring; and (ii) limit the risk of harm to patient or personnel if it does

Premature recovery from general anaesthesia in an adult Limousin bull

This case report describes the premature and unanticipated recovery of a bull from general anaesthesia for penile surgery. Retrospective review revealed: (i) the elements of case management that contributed to this critical event; and (ii) other measures that allowed prompt control, thus minimising risk to the subject and personnel. The case highlights the challenges of monitoring depth of anaesthesia in large ruminants and illustrates that non‐surgical stimuli such as hoisting can be equally, if not more, stimulating than surgery itself. Finally, practical recommendations are made to: (i) reduce the likelihood of this problem recurring; and (ii) limit the risk of harm to patient or personnel if it does

In Vivo Characterization of a Wireless Telemetry Module for a Capsule Endoscopy System Utilizing a Conformal Antenna

This paper describes the design, fabrication, packaging, and performance characterization of a conformal helix antenna created on the outside of a 10 mm ×30 mm capsule endoscope designed to operate at a carrier frequency of 433 MHz within human tissue. Wireless data transfer was established between the integrated capsule system and an external receiver. The telemetry system was tested within a tissue phantom and in vivo porcine models. Two different types of transmission modes were tested. The first mode, replicating normal operating conditions, used data packets at a steady power level of 0 dBm, while the capsule was being withdrawn at a steady rate from the small intestine. The second mode, replicating the worst-case clinical scenario of capsule retention within the small bowel, sent data with stepwise increasing power levels of –10, 0, 6, and 10 dBm, with the capsule fixed in position. The temperature of the tissue surrounding the external antenna was monitored at all times using thermistors embedded within the capsule shell to observe potential safety issues. The recorded data showed, for both modes of operation, a low error transmission of 10−3 packet error rate and 10−5 bit error rate and no temperature increase of the tissue according to IEEE standards