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Biomedical subjects

J B Lauritzen

Publications and source records attributed to J B Lauritzen.

12 recordsLinked to original sources
PubMed1992

Protection against hip fractures by energy absorption.

Impact lateral to the hip was noted in 37 of 60 patients with hip fracture. Women with hip fracture (n = 12) had an average 22 mm thick soft tissue cover of the hip as compared to 32 mm in healthy women (n = 27), even for the same body mass index. Experiments where a steel weight was dropped from various heights onto porcine soft tissue showed that a layer of 29 mm could absorb 60% more energy than a 20 mm thick layer before nearly metallic contact would occur, corresponding to a sharp rise in load. If the results are related to conditions in vivo, then the passive protection of soft tissue over the hip is important for the development of hip fractures, and may under certain assumptions explain the higher risk of hip fractures in thin persons. An external hip protection device might therefore prevent some hip fractures.

Adult↗
PubMed1989

[A comparative study of the Lixiscope and conventional X-ray in fracture diagnosis].

The Lixiscope is a portable hand-held real time imaging device, weighing 3 kg, with an iodine-125 source. The Lixiscope was compared with conventional x-ray. An in vitro experiment trial of the Lixiscope on a transected ox bone, and an in vivo experiment with 24 patients from the Accident & Emergency Department, were made. The diagnostic specificity for two doctors was found to be 0.67 and 1.00 and the diagnostic sensitivity was 0.78 and 0.84. The Lixiscope may be used in the Accident & Emergency Department, and similary in situations where x-ray is not avaiable the Lixiscope seems to be valuable.

Arm Injuries↗
PubMed1987

Heart rate responses to moderate linear body accelerations: clinical implications in aeromedical evacuation.

Linear accelerations during take-off and landing were measured in both civilian and military aircraft usually involved in aeromedical evacuations in Denmark. Accelerations of similar durations and magnitudes were induced in six healthy subjects transported in an ambulance in different supine positions. Heart rate responses recorded depended significantly on the position of the subject. It was concluded that seriously ill patients must be positioned transversely to the axis of acceleration during aeromedical evacuation.

Acceleration↗
PubMed1986

Duodenal output of lactoferrin in normal subjects and correlation to output of amylase, bicarbonate, and total bile acids.

Nineteen normal subjects were studied before and after pancreatic stimulation. Duodenal flow was quantitated by means of a dilution indicator technique, and the secretion pattern of lactoferrin, amylase, total bile acids, and bicarbonate was studied. Output of lactoferrin in the duodenum was increased both after stimulation with a test meal and after hormonal stimulation by cholecystokinin alone or cholecystokinin in combination with secretin. Output of lactoferrin was not affected by stimulation by secretin alone. Lactoferrin was secreted in parallel with amylase and bile acids. The results indicate that the origin of lactoferrin in duodenum can be bile or pancreatic juice, or a combination of these.

Adult↗
PubMed1986

Duodenal output and concentration of lactoferrin in chronic pancreatitis: correlation to amylase secretion and duct morphology.

To evaluate the clinical value of lactoferrin determination in duodenal contents in patients with chronic pancreatitis, three different studies were performed. No significant difference in meal stimulated output or secretion pattern was found between seven patients with chronic pancreatitis and six controls. After a meal test in 88 patients suspected for pancreatitis no correlation between concentration of lactoferrin and amylase was found. No correlation was found between degree of obstruction at endoscopic retrograde pancreaticography and duodenal concentration of lactoferrin. We conclude that the diagnostic value of lactoferrin determinations in chronic pancreatitis is doubtful.

Adult↗
PubMed1986

The association between drinking and smoking habits among conscripts in the Danish Navy and Army.

In 1982 an alcohol and tobacco questionnaire was given to Danish conscripts on random weekdays in the first two weeks of call-up. The conscripts were asked about the previous day's consumption of alcohol and tobacco. In the navy 94.4% (N = 162) and in the army 92.0% (N = 514) answered the questions. Both smoking and drinking in the navy were found to be more prevalent than in the army, whereas the habits among conscripts in the army and in the civilian population were identical. In the army length of education was found to be inversely related to drinking and smoking, whereas in the navy education did not seem to influence smoking or drinking habits. In the army increasing amounts of drinking were associated with higher prevalences of light to heavy smoking and vice versa. In the navy only heavy drinking was strongly associated with a pronounced rate of heavy smoking. The difference seen between the navy and the army in tobacco and alcohol habits could not be explained by differences in age or level of education. Some other sociological, psychological and life style factors may be involved. We find it relevant to pinpoint high risk populations regarding excessive alcohol and tobacco consumption, so that rational prophylaxis or intervention might be effectuated. Health education programmes ought to contain information about the illnesses of both excessive alcohol and tobacco consumption, as these habits are closely related.

Adolescent↗