PubMed Health⌕ Search

Biomedical subjects

I Wieser

Publications and source records attributed to I Wieser.

14 recordsLinked to original sources
PubMed2000

Urinary tract infection prophylaxis using Escherichia coli 83972 in spinal cord injured patients.

PURPOSE: Escherichia coli 83972 was previously shown to establish bladder colonization in select patient groups. We evaluate the safety and feasibility of using bacterial interference with E. coli 83972 to prevent urinary tract infection in spinal cord injured patients. MATERIALS AND METHODS: A total of 21 men and women with neurogenic bladder secondary to spinal cord injury underwent intravesical inoculation with E. coli 83972. Frequency of symptomatic urinary tract infection before and after colonization was compared. RESULTS: Successful long-term bladder colonization was achieved in 13 study participants. Mean duration of colonization was 12.3 months (range 2 to 40). Subjects had no symptoms of urinary tract infection while colonized with E. coli 83972 (0 infection per 18.4 patient-years). Successfully colonized subjects had experienced a mean of 3.1 symptomatic urinary tract infections per year (range 2 to 7) before colonization. Symptomatic infection also occurred in 4 subjects who were not successfully colonized with E. coli 83972 and in 7 others after spontaneous loss of colonization. Colonized subjects reported subjective improvement in quality of life with respect to urinary tract infection while colonized. CONCLUSIONS: E. coli 83972 may be safely used to establish long-term asymptomatic bladder colonization in spinal cord injured subjects. Preliminary findings suggest that colonization with E. coli 83972 may reduce the frequency of urinary tract infection in patients with neurogenic bladder secondary to spinal cord injury.

Adult↗
PubMed1997

Injuries due to letter bombs.

In Austria in late 1993 ten letter bombs were sent to outstanding persons who have been engaged in the care of foreigners. Four of these bombs detonated, when they were opened by the addressee. The remaining six bombs were discovered in time and could be deactivated by specialists. The construction of these bombs and the lesions sustained by the four victims will be discussed. The injuries mainly concerned the left hand, i.e., the hand used by right-handed persons to hold a letter when opening it. The way holding the letter was of crucial influence on the degree of injury, as with the same explosive charge (which can be assumed deducing from the investigation of the deactivated bombs) injuries varied considerably. They ranged from minor tissue-lesions to mutilated fingers and the risk of exsanguination.

Adolescent↗
PubMed1991

[Medical and technical aspects of weapon effects. IV. Plastic bullets reduce the risk of the military assault rifle (StG 77)].

56 x 45 mm Rota-ammunition was introduced to meet the requirements of security personnel at prisons. The Austrian military assault rifle (StG 77) can be used for this ammunition. The bullet consists of an X-ray dense plastic material with a weight of 1.6 g. Therefore the kinetic energy of this projectile is lower than that of the standard ammunition, also on its flight it loses velocity at a higher rate. Thus, this bullet has the advantage of being less dangerous over long distances (500 m versus 2500 m or more) but still offers at short distances (fe 10 m) a reasonable capacity of incapacitation. Tests concerning ballistics, penetration and shooting at gelatine and soap targets were performed. By means of these tests we compared the wounding capacity of the standard ammunition (5.56 x 45 mm S-cartridge) and the investigated Rota-ammunition.

Animals↗
PubMed1991

Shots fired with silencers--a report on four cases and experimental testing.

Four cases of homicide, in which silenced firearms were used, are reported and supplemented by data from experimental investigations regarding wound features, marks, traces, and ballistic behavior. Wound features are largely determined by the construction of the silencer. In one case, even a muzzle imprint was produced by a silenced weapon fired at contact range. In general, silencers are likely to result in a decrease in bullet energy and accelerated energy release in the target (tissue). In terms of wound morphology, silencers produced a reduction in or even a lack of the contact ring (ring of dirt). In close-range and contact wounds, any features indicative of shots fired at close range were missing (such as soot deposit and powder tattooing). It is also worth mentioning that biological matter may get into the silencer in shots fired at contact range.

Adult↗
PubMed1989

[Gunshot wounds of the head in soldiers wearing military helmets-- general aspects and experiments and observations on the biomechanics and wound morphology].

With respect to wound ballistics, the situation is different if the person wearing a military helmet suffers head injuries from a bullet. The mechanisms of injury were investigated in four experimental series and supplemented by a case history. The study showed surprising results: in the majority of cases, the helmet does not protect the wearer, but instead intensifies the damage caused by the bullet. The reasons for this phenomena are changes in the stability of the projectile and deformation of or damage to the bullet. All of these mechanisms result in the bullet striking the tissue with higher energy. In this investigation, Kevlar helmets were also tested, which are not penetrated by 9 X 19 mm parabellum bullets. Even so, however, severe injuries of the skull and brain can occur because the projectile causes intensified impressions on the skull under the helmet and, in addition, an acceleration of the head.

Biomechanical Phenomena↗
PubMed1988

[Teeth as an intermediate target--a cause for rapid disintegration of the full metal-jacketed bullets used by the military].

Sharp-pointed full metal-jacketed bullets fired from assault rifles are expected to have a low tendency of deformation or destruction within biological tissues. In principle this also should apply to small calibre projectiles .223. If a bullet penetrates the oral region, contact with teeth can cause early break up and even total disintegration of the projectile. Under such circumstances the fragments are possibly retained within the body. A case of accidental gunshot injury to the head inflicted with an assault rifle AUG Steyr. 223 of the Austrian army serves to demonstrate and discuss the wound ballistic effects in relation to the altered behaviour of the projectile. Analogous findings were reproduced in experimental models.

Adult↗
PubMedDate not supplied

[Electroshock devices as weapon].

13 electric shock weapons were investigated. The authors measured the electrical output and observed the effects on corpses and test persons. The electric shock weapons produced only moderate pain and did not stop the disposing capacity. The electrocardiogram and the circulation parameters were not influenced. The electric shock weapons tested might have only a limited deterrent effect and might be able to cause fatal complications under circumstances. Drug use and heart disease might enhance the risk.

Adult↗