Biomedical subjects

J Rehage

Publications and source records attributed to J Rehage.

22 records · Page 2Linked to original sources

PubMed1994

[Effects of a surgical reposition of left-sided abomasal displacement on parameters of energy metabolism in dairy cows].

The objective of this study was to investigate whether the surgical replacement of left abomasal displacement (omentopexy) leads to typical stress changes in the energetic metabolism of dairy cows: twenty dairy cows, aged approximately 4.4 years were used. Six blood samples were collected in order to determine concentrations of cortisol, glucose, free fatty acids, L(+)-lactate, and beta-hydroxybutyrate once before, and five times after surgery. The surgical intervention led to a significant elevation in cortisol, glucose, FFA and lactate blood levels. These stress-related changes were observed over a 24 hour-period after surgery. In contrast to these parameters, serum concentration of beta-hydroxybutyrate slowly decreased over the entire observation period (72 hours). The results show that surgical correction of left abomasal displacement has a short-term stress effect on energy metabolism of dairy cows.

Abomasum↗

PubMed1994

[Experiences with the use of xylazine for sacral epidural anesthesia in cattle].

The effect of epidural administered xylazine was investigated in 10 mature Holstein cows (mean age: 5.4 +/- 1.2 years, mean BW: 572 +/- 23 kg): 5 cows were treated with xylazine in a low dose of 0.05 mg/kg body weight, 3 cows in a medium dose (0.07 mg/kg BW) and 2 cows in a high dose (0.1 mg/kg BW). Xylazine dosages were diluted in sterile saline to a final volume of 5 ml. As a control, lidocaine (5 ml of a 2% solution) was given to 5 cows epidurally. Duration of regional anaesthesia after low dose of xylazine (0.05 mg/kg BW) was significant longer (mean: 2.2 hours) compared to lidocaine treated cows (mean: 1.1 hour). Regional extension of anaesthesia was comparable after dosing with xylazine and lidocaine (tail, after, vulva and perineum). All cows remained standing, but in xylazine treated cows systemic effects, e.g. mild sedation, decreased heart- and respiratory rates, decreased rumen motility and mild bloat were observed. With increased dosages of xylazine a prolongation of epidural anaesthesia up to 3 hours was achieved, but regional extension of this effect remained nearly unchanged. With increased xylazine dosages, cows showed marked sedation and ataxia and sternal recumbency were induced.

Anesthesia, Epidural↗

PubMed1990

[Fallot's tetralogy in a calf--a case report].

A report is given on a calf with tetralogy of Fallot. This is the most common cyanotic congenital heart lesion in calves. Diagnosis was made by two-dimensional echocardiography and heart catheterisation. Tetralogy of Fallot was confirmed by necropsy.

Animals↗

PubMedDate not supplied

Colostrum management in calves: effects of drenching vs. bottle feeding.

The objective was to examine whether the administration of colostrum by a drencher is a safe method to achieve satisfying immunoglobulin concentrations in newborn Holstein Friesian (HF)-calves. Twenty-one calves were fed 1 h postnatum with 2 l colostrum from their dam using a nipple bottle (group I); 15 calves were drenched with 4 l colostrum from their dam 1 h postnatum (group II). Thereafter, all calves were fed milk replacer exclusively. Serum concentration of total immunoglobulin [analysed by Sandwich-enzyme-linked immunosorbent assay (ELISA)] 24 h postnatum was higher in drenched calves (25.2 g/l; 12.8/52.2; median and 10/90 percentiles) compared with bottle-fed calves (14.1 g/l; 9.2/24.7). To characterize the kinetics of immunoglobulin absorption, 17 blood samples were taken frequently within 72 h postnatum using a jugular catheter in five calves fed 2 l colostrum by nipple bottle and five calves drenched with 4 l colostrum 1 h postnatum. A slightly delayed increase of serum immunoglobulin concentration (approximately 3 h) was obvious in drenched calves compared with bottle-fed calves, but drenched calves reached significantly higher immunoglobulin concentrations compared with bottle-fed calves. It is concluded that the proper application of colostrum by a drencher is a useful method for adequate colostral supply in newborn calves. The failure of the oesophageal groove reflex in drenched calves caused no clinical consequences.

Animals↗