Search PubMed⌕ Search

Biomedical subjects

J Erhardt

Publications and source records attributed to J Erhardt.

6 recordsLinked to original sources
PubMed1992

[Prognostic factors and results after the combined surgical and radiotherapy treatment of ependymomas].

Between 1978 and 1991, 31 patients with primary (n = 28) and recurrent (n = 3) ependymoma received external radiation after initial surgery. There were 26 cases of intracranial and five cases of spinal ependymoma. Histological grading revealed low-grade in 23 and high-grade tumors in eight patients. Craniospinal irradiation was given to 13 of 28 patients, whole cranial radiation with boost to posterior fossa in three and local treatment to twelve patients. Six of 28 patients received chemotherapy. Dose to the primary, tumor localisation, grading and extend of surgery did not significantly impact on survival and relapse-free survival. Age was a marginally significant prognostic factor for survival. In patients with intracranial ependymoma (n = 24) survival and relapse-free survival at five years were 54% and 42%, respectively. Patterns of recurrence showed a local recurrence alone in eight, a CNS-relapse with local recurrence in four and local recurrence with distant metastases in one case. Spinal seeding occurred in two of 13 after craniospinal irradiation and two of twelve patients after local treatment. The main problem in the treatment of ependymoma remains local control, the use of spinal irradiation does not seem to improve treatment results.

Adolescent↗
PubMed1992

Cardioprotection and attenuation of endothelial dysfunction by organic nitric oxide donors in myocardial ischemia-reperfusion.

The effects of two nitric oxide (NO) donors were evaluated in a 6-h model of feline myocardial ischemia-reperfusion. After 80 min of a 90-min ischemic period, SIN-1 or C87-3754 or their respective controls (i.e., 0.9% NaCl or C88-3934, a control compound which does not release NO) were given i.v. as a bolus (0.1 mg/kg) and infused at 1 mg/kg/h for the entire 4.5-h reperfusion period. Administration of the active NO donors significantly decreased the necrotic area/area-at-risk ratio from 29 +/- 3% in the vehicle group to 9 +/- 2 and 11 +/- 5% in the SIN-1 and C87-3754 groups, respectively (P less than .001). The inactive NO donor C88-3934 failed to reduce infarct size (31 +/- 3%). Neither NO donor reduced the accumulation of neutrophils in the necrotic area when compared to their respective control groups, but both agents significantly attenuated coronary endothelial dysfunction as shown by a vasorelaxation to acetylcholine of 62 +/- 2 and 64 +/- 3% in the SIN-1- and C87-3754-treated arteries, as compared to only a 27 +/- 3 and 34 +/- 4% vasorelaxation in the vehicle and inactive NO donor groups, respectively (P less than .001). Our studies show that SIN-1 and C87-3754 exert beneficial effects in a 6-h model of myocardial ischemia-reperfusion. Both NO donors decreased myocardial necrosis and decreased the reperfusion-induced endothelial dysfunction without significantly altering the pressure-rate index (i.e., an index of myocardial oxygen demand).

15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5↗
PubMed1985

[Objectivation of the effect of antitussive agents using tussometry in patients with chronic cough].

The antitussive effect of several antitussive agents has been objectively evaluated in patients with chronic stable cough due to bronchial carcinoma, pulmonary tuberculosis or chronic obstructive lung disease. The patients received the active antitussive drugs or placebo in a double-blind, randomized crossover design. The preparations were administered at 10 p.m. and 2 a.m. on 7 consecutive nights and no antitussive was given for the following 20 hours. Cough frequency and intensity were recorded from 10 p.m. until 6 a.m. The active medications were noscapine (30 mg), dextromethorphan (20 mg), dihydrocodeine (30 mg) and codeine (20, 30 and 60 mg) at 10 p.m. and 2 a.m. Cough frequency and intensity were objectively assessed with a pressure transducer placed over the trachea and recorded on a chartrecorder. Statistical analysis was performed with analysis of variance and multiple range testing. Noscapine, dextromethorphan, dihydrocodeine and codeine (60 mg) significantly (p less than 0.001) reduced the cough frequency compared to placebo. They also produced a greater reduction of cough intensity than placebo, codeine (20 mg) and codeine (30 mg) (p less than 0.001). The duration of action of low-dose codeine (6 hours) was unsatisfactory. Subjective preference for dextromethorphan indicates a psychotropic central nervous action of this drug not assessed by the measuring device. Noscapine was equally well tolerated but more neutral psychologically.

Adult↗
PubMedDate not supplied

[Sonographic and Doppler color sonographic findings in osteosarcoma].

Till now bone tumors are diagnosed radiologically. In this paper we describe the characteristic sonographic and colour Doppler sonographic features in 5 patients with histologically confirmed osteosarcoma. A large soft tissue tumor with echogenic osteosclerotic areas and echo-free caverns could be shown in all patients. Characteristic signs were destructions of the cortical layer and reactions of the periosteum. Compared to normal tissue an increased number of blood vessels with increased blood flow were visible by colour coded Doppler sonography in the region of the tumor. Sonography and colour coded Doppler sonography are important additions of conventional radiology to describe the structure, extension and blood supply of an osteosarcoma.

Adolescent↗