Biomedical subjects

R Limmer

Publications and source records attributed to R Limmer.

3 recordsLinked to original sources

PubMed1989

Computer acquisition and analysis of skin temperature and heat flow data from heat flux transducers.

A computer-controlled system for the collection and analysis of skin temperature and heat flow data originating from an array of heat flux transducers is described. The system is based on a program ('THERMAL') that reads, stores, prints and displays skin temperatures and heat flow data every 2 min for up to 4 h. It also simultaneously calculates important environmental physiology parameters such as mean skin and mean body temperatures as well as mean heat flow according to four different combinations of transducers such as the established 3-, 4-, 7- and 12-point (site) formulae. Core temperature, heart rate and environmental condition indices such as dry bulb, wet bulb and globe temperatures are also continuously monitored.

Body Temperature↗

PubMed1985

[Respiratory functional hypoxia in ruminants under general anesthesia].

General anesthesia causes a marked hypoxia in ruminants. We compared this phenomenon with anaesthesia related changes in the dog. Under alfentanil/etomidat anaesthesia some variables of the pulmonary circulation (TPR, PAP, PCWP) as well as arterial and venous blood gases and saturation (HbO2, pO2, ph) in dogs, sheep and calves were measured and calculated. The calculated pulmonary shunt fraction was compared between the three species. In ruminants there was an increase of total pulmonary resistance being associated with elevated PAP and decreased PCWP. The pulmonary shunt fraction was increased significantly and markedly during the surgical tolerance period, too. These parameters were not significantly changed in the dog. Ruminants seem to take an exceptional position concerning the anaesthesia related alterations of the pulmonary ventilation/perfusion system.

Adjuvants, Anesthesia↗

PubMed1980

Body cooling after death.

In the analyses of cases of death in cold air environments, it is often of interest to determine the time required for the body of the individual to cool to ambient temperature. Usually such determinations have been based on Newton's law of cooling. This paper describes a case history in which this technique was experimentally tested and consequently abandoned in favour of a more complex biophysical model which more accurately described the thermo-physical events inherent in body cooling. This model is recommended for determination of the times required for various body parts to cool to ambient environmental temperatures.

Animals↗