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K B Carter

Publications and source records attributed to K B Carter.

24 records · Page 2Linked to original sources
PubMed1977

An assessment of a non-invasive technique for measuring deep body temperature.

The assessment of a non-invasive technique for measuring deep body temperature is described. An experimental system, in which the insulating effect of subcutaneous fat thickness could be simulated, was designed to test the deep body thermometer (DBT). The assumption that the instrument produced zero temperature gradient was found to be incorrect, and a mathematical model was developed which showed that the cyclically varying output of the device is an inherent property of its design. The accuracy and response time were investigated as a function of tissue thickness to assess the instrument's clinical usefulness.

Adipose Tissue↗
PubMedDate not supplied

Tourniquets for surgery: safety aspects.

There are a variety of different types of pneumatic tourniquets in constant use within the UK Health Service. These range from simple manually operated units to more complex gas-powered devices. Fatalities have occurred following the failure of pneumatic tourniquets during surgery when the local anaesthetic agent administered to the patient entered the circulation. Investigation has revealed that certain tourniquet systems have design defects, for example deterioration of rubber tubing, inadequate securing of pressure tubing, excessive wear in a pressure regulator. With any tourniquet system, routine maintenance coupled with regular user checks are essential to ensure reliability.

Equipment Safety↗
PubMedDate not supplied

Remote Control Systems' Radiotelemetry Receiver 7060: its use in clinical colonic motility measurement.

A new radiotelemetry receiver type 7060 for use with radiopills is described. Its performance under laboratory conditions was assessed and its use for clinical colonic pressure measurements evaluated. The receiver, which resembles a small microcomputer, was easy to set up and worked reasonably well under ward conditions. Difficulties were experienced with the belt aerial supplied with the receiver, which did not reliably pick up signals from a freely moving radiopill. The receiver is not suitable for ambulatory applications. Its main clinical use is in situations where frequent sampling of the radiopill's signal over a long period of time is essential (e.g. colonic pressures). The large quantity of data generated can be fed from the receiver's analogue or digital output on line to a recorder.

Biomedical Engineering↗
PubMedDate not supplied

Biomechanical evaluation of an artificial anal sphincter prosthesis.

An artificial anal sphincter was designed to reproduce the normal physiology of the ano-rectum by flattening and angulating the bowel without causing crenation. It was shown in the laboratory that by eliminating crenation, occlusion pressure was evenly distributed without localized high pressure points under the device. Further, the design facilitates the creation of angulation of the bowel in a relatively large area of distribution of the occlusion pressure, allowing the device to be set at lower operating occlusion pressures than that required for circular designs yet still achieve continence. Each of the components of the device was studied separately and the whole system was assessed in an acute and survival animal model.

Anal Canal↗