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Biomedical subjects

F C Flack

Publications and source records attributed to F C Flack.

31 records · Page 2Linked to original sources
PubMed1975

Variations of deop size in disposable administration sets used for intravenous infusion.

The variation of drop size with drip rate has been studied for giving sets made by two major United Kindgom manufacturers. Data are given for the variation using Sodiun Chloride Injection (BP), Sodium Chloride and dexerose Injection (BP) and blood. All sets investigated conformed to BS 2463. A table is provided to enable more accurate delivery of infusion for the three fluids examined.

Blood Transfusion↗
PubMed1975

Case study using simultaneous bladder pressure and urine loss measurements.

Using an "electronic nappy" of improved design and a miniature pressure manometer of the strain-gauge type mounted at the tip of a catheter, the case of a patient with spina bifida and a large lipoma has been investigated. Some retention exists, but areas on the lipoma surface can be touched lightly, causing an increase in bladder pressure with subsequent voiding as measured by the nappy. Investigations of the same area by electrical stimulation produced rises in bladder pressure sustained for only a few seconds, as in the case of manual stimulation. Local anaesthetic in the "trigger" area prevented bladder pressure changes and urine loss, but triggering returned as the anaesthetic wore off.

Adolescent↗
PubMed1974

Behaviour of standard gravity-fed administration sets used for intravenous infusion.

The major factor influencing drip rate during intravenous infusion using a standard administration set is the variation in the venous pressure of the patient. Creep in the plastic material, though present, is shown to be unimportant. For steady and accurate infusion it is necessary to provide the ordinary gravity-fed administration set with some form of servo-control mechanism.

Gravitation↗
PubMedDate not supplied

Superimposition of analogue data onto a video image: a new technique.

There are many tools to aid the clinician in making an accurate medical diagnosis including various imaging techniques and recording analogue signals from the patient. A new, inexpensive method of combining a video image and the instantaneous values of analogue waveforms is described here. The system, TVDATA, is reliable, compact and portable and has been successfully used in various clinical situations. The unit requires a standard video source, such as a camera, a TV monitor, a video recorder and the output from the analogue source or sources. The analogue data are converted into a digital signal and then displayed in a convenient part of the screen as a horizontal bar. Two types of data channel are available--uni- and bidirectional. A number of these channels can be used to record different analogue parameters and an inbuilt octal frame counter assists subsequent review of the video record.

Analog-Digital Conversion↗