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Biomedical subjects

H P Meier

Publications and source records attributed to H P Meier.

13 recordsLinked to original sources
PubMed1997

[Length of gestation of Freiberger mares with mule and horse foals].

In a retrospective study the gestation lengths of two groups, each consisting of 193 "Freiberger" mares, were compared. The mares of the first group were bred by a donkey, those of the second group by a stallion of the "Freiberger" breed. On average, the gestation length of mares with "Freiberger" foals lasted 336.5 days, and that of mares with mule foals 343.1 days. The difference between both groups was significant (p < 0.001). The shortest and longest observed gestation length of mares with "Freiberger" foals was 307 and 361 days, and that of mares with mule foals 315 and 369 days, respectively. Additionally, we examined if the stallion, the mare, the age of the mare, the sex of the foal and the time of mating during the breeding season influenced gestation length of mares with mule foals and if the age of the mare, the sex of the foal and the time of breeding influenced gestation length of mares with "Freiberger" foals. The time of breeding and the mare had a significant (p < 0.05) influence on gestation length.

Age Factors↗
PubMed1997

[The spontaneous reduction of a twin pregnancy in two mares].

Twin pregnancies are a serious problem in stud medicine as they terminate in most cases in abortion, stillbirth or the delivery of dead or weak and deformed foals. In recent years, the introduction of sonography has greatly improved the management of mares with twin conceptuses, in particular monitoring the phenomenon of spontaneous embryo reduction to a single vesicle. This allows supervision of pregnancy with relatively little expenditure and loss of time. We document the spontaneous reduction to single vesicles of unilateral twin pregnancies in a draught- and a warmblood-mare. In both mares diagnosis of twins was made 17 days after covering; they probably resulted from synchronous double-ovulations. After another 5 days, distinct signs of the loss of one conceptus were recognized and, subsequently, only single pregnancies existed. No interventions were necessary.

Abortion, Veterinary↗
PubMed1996

[The history of neurectomy in horses with navicular disease].

The genetic predisposition to navicular disease is proven nowadays, but otherwise, etiology and pathogenesis are still unclear. Causal therapy isn't possible and because of the poor prognosis, neurectomy is still of bearing. This operation was performed already 200 years ago, but in the middle of the last century, critical voices have been raised in regard to the surgical procedure and its indication both for medical reasons and breeding. Clear instructions for exclusion of diseased animals from breeding are also older than one hundred years. These facts call for ethic considerations which concern both breeding and use of these animals. In earlier times, horses were used for basic human requirements mainly, but nowadays their employment occurs mainly for pleasure. Ethic reflections are our task, as our specialized knowledge forms their basis. Our philosophy has to be applicable in practice, what can be achieved best with utilitarianistic reasoning. The possibilities of our influence on the sport are limited, but in breeding our commitment has to be vigorous and unrestricted. Due to the development of immunogenetic studies, legal problems may arise in the near future as well.

Animals↗
PubMed1993

Equine pituitary adenoma: a functional and morphological study.

Clinico-pathological correlations in horses with pituitary adenomas are poorly understood. This paper describes the functional and morphological features of five cases of equine pituitary adenoma and of a case of multinodular pituitary hyperplasia. New findings reported include immunoreactivity for beta-lipotropin (beta-LPH), beta-melanocyte-stimulating hormone (beta-MSH), gamma 3-MSH, prolactin (PRL), and follicle-stimulating hormone (FSH) in neoplastic cells of the pituitary adenoma; and, in the multinodular hyperplasia, beta-LPH, beta-endorphin (beta-END), alpha-MSH, beta-MSH, gamma 3-MSH and FSH immunoreactivity. It is suggested that the equine pituitary syndrome does not correspond to human Cushing's disease, as generally accepted, but is related to the overproduction of several pro-opiomelanocortin (POMC)-derived peptides by the cells of the tumour or hyperplastic nodules.

Adenoma↗
PubMed1992

[Typical presentation of the common tendon sheath of the M. flexor hallucis longus and the M. tibialis caudalis in the horse].

The possibilities for imaging soft tissue structures, especially fluid-filled cavities such as articulations, bursae or tendon sheaths, have been improved markedly by sonography in recent years. Ultrasonic examinations were performed on the common tendon sheath of the musculus flexor hallucis longus and the musculus tibialis caudalis, from the medioplantar aspect of the tarsus, in 12 sound adult draft- and warm blood horses, and in 5 animals with a distended common sheath. The diagnostic precision of the sonographic examination of the tendon sheath is excellent and is superior to conventional radiography. A nuclear magnetic resonance tomogram of an isolated equine tarsus is presented for comparison method.

Animals↗
PubMed1978

The risks of small intestinal transplantation for the recipient: experimental results in young minipigs.

In a previous series of 36 small intestinal transplants in young minipigs, a monitoring system, based on a special transplantation model, clinical and histologic criteria has been worked out. The spontaneous evolution was observed and no attempt was made to save the animal when complications on the graft occurred. Most of the animals died. In the present series of 32 small intestinal transplants the monitoring system and explanation criteria are now tested. Twenty-three primarily successfully transplanted animals had complications of the graft, i.e., hemorrhagic infarction, deficient arterial circulation, or rejection. Only 1 of the 23 died before explanation could be done. Twenty-two were explanted according to the previously established criteria. Two died of complications not directly related to the graft, the other 20 animals survived for 1-5 mo. All 22 explanted grafts showed irreversible damages both macroscopically and on histologic examination. The present series confirms that early recognition of complications of the graft and timely removal with survival of the recipient animal is possible. This could be an important step forward to the clinical application of small intestinal transplantation in man.

Animals↗
PubMed1977

[Screening of newborn infants in cystic fibrosis. Evaluation of a 4-year study in Switzerland].

The results of an evaluation over 4 years (1973-1976) of 16,620 BM-tests (Boehringer-Mannheim newborn screening for cystic fibrosis) at 8 hospitals in Switzerland are presented and the data from analysis of albumin, protein and alpha1-antitrypsin concentrations, and on trypsin-inhibitory capacity of the meconia are discussed. 99.5% of the tests were negative. Of the remaining 0.5% BM-positive tests, the diagnosis of cystic fibrosis required confirmation by sweat test and clinical course in 6 cases, or 0.04% of the total collective. The test was false-negative in 2 cases (0.012%), of which one had a primary pulmonary form of cystic fibrosis. The study shows that the BM-test, as screening test for cystic fibrosis, makes it possible to distinguish between "normal" and "suspect". By calculating the ratio albumin to alpha1-antitrypsin, it would be possible to verify the probability of a reliable diagnosis as early as a few days after birth. As before, however, it would be indispensable to confirm the diagnosis of cystic fibrosis by a sweat test with pilocarpin iontophoresis. By consistent screening in all obstetric and pediatric clinics it would be possible to improve early diagnosis still further.

Cystic Fibrosis↗