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Biomedical subjects

R Courbier

Publications and source records attributed to R Courbier.

At least 55 records · Page 3Linked to original sources
PubMed1982

[Prevention of gastroduodenal complications in coronary surgery. Usefulness of preoperative fiberoscopy].

Fiberoscopic examination of the oesophagus, stomach and duodenum was carried out in 60 coronary disease patients prior to aorto-coronary bypass. Lesions of the upper digestive tract were detected in one-third of the patients; half of them were asymptomatic. The management of these cases depended upon the urgency of the cardiovascular operation. In 17 cases, a 1-month treatment of the digestive lesions with antacids and cimetidine was instituted immediately after fiberoscopy, and revascularization was performed 8 days later. In 3 cases, the cardiovascular operation was postponed; after 1 month of treatment only one patient had active lesions on control fiberoscopy and had to undergo digestive surgery prior to aorto-coronary bypass. No gastroduodenal complications of cardiovascular surgery was observed in this series.

Antacids↗
PubMed1981

Double-blind capillaroscopic study of the activity of buflomedil in Raynaud's syndrome: a report on 80 cases.

A double-blind study was performed to compare the effects of buflomedil versus placebo on the capillaroscopic images of the nailbed before and after a cold test in 80 patients with Raynaud phenomenon. The results were scored according to the elements of capillaroscopy (number of capillaries, size, density). Buflomedil was found to significantly better than a placebo (p less than 0.02).

Capillaries↗
PubMed1981

[The value of spectral frequency analysis by Doppler examination (author's transl)].

Arterial stenoses of moderate extent may involve modifications of the blood flow. Arterial shading is not always examined at the best incident angle to assess the extent of the stenosis. Spectral frequency analysis by Doppler examination is a good means of evaluating the effect of moderate arterial lesions. The present study was carried out with a Doppler effect having an acoustic spectrum, which is shown in a histogram having 16 frequency bands. The values were recorded on the two femoral arteries. A study was also made of 49 normal subjects so as to establish a normal envelope histogram, taking into account the following parameters: maximum peak (800 Hz), low cut-off frequency (420 Hz), high cut-off frequency (2,600 Hz); the first peak was found to be present in 81 % of the subjects (at 375 Hz) and the second peak in 75 % of the subjects (2,020 Hz). Thirteen patients with iliac lesions of different extent were included in the study; details of these lesions were established in all cases by aortography. None of the recorded frequency histograms were located within the normal envelope. Two cases of moderate iliac stenoses were noted ( Less Than 50 % of the diameter) which interfered with the histogram, even though the femoral velocity signal was normal.

Adult↗
PubMed1981

[Spectral analysis of frequencies by conventional Doppler effect examination of the supra-aortic trunks (author's transl)].

Using a directional Doppler (4 MHz) coupled to a frequency analyser, authors investigate the supra-aortic trunks on 90 patients documented by arteriography. The analyser is made of a 16 filter bank system giving a spectrum composed of 16 frequency bands within range of 160 Hz to 4,800 Hz. Data analysis is made on a computer using the comparison means test and the discriminant analysis. Authors compare frequencies on normal common carotid arteries between a group (N = 102) with internal and external carotid arteries free of lesions on one hand, and a group (N = 75) with stenosis or occlusion of internal and/or external carotid arteries on the other hand. They don't note any significant difference for each on of the 16 frequency bands. Comparison of frequencies between normal subclavian arteries (N = 115) and subclavian arteries with proximal stenosis or occlusion (N = 24) shows a significant difference concerning the following bands : F12, F14, F15, F16 (p = 0.05), F13 (p = 0.01). Comparison of frequencies between normal internal carotid arteries (N = 108) and stenosed internal carotid arteries (N = 57) shows significant difference concerning : F11 (p = 0.05), F7, F8, F9, F12, F13, F14, F15, F16 (p = 0.01). On the other side, the discriminant function distinguishes a normal internal carotid artery from a stenosed internal carotid artery in 90% of cases, whatever the stenosis degree is. A discriminant function, added to this analyser, could obtain a frequency analysis easier and less expensive than by fast Fourier transform.

Arterial Occlusive Diseases↗
PubMed1980

[Results of operative treatment of digestive arteriopathies (author's transl)].

Of 51 patients treated for digestive tract arterial lesions, 35 concerned the superior mesenteric artery. Long-term (up to 12 years) results showed that the quality of the reconstruction had not deteriorated. As technical problems have now been resolved, preventive reconstructive surgery can be proposed for those cases in which an ectatic or thrombogenic aorto-iliac lesion requires correction, without increasing operative risks.

Adult↗
PubMed1980

[Pre-occlusive stenosis of the internal carotid artery. Haemodynamic study by Doppler effect, phonoangiography-oculoplethysmography and arteriography (author's transl)].

The diagnosis of near total occlusion of the internal carotid artery was made on a group of 122 patients (90 symptomatic - 32 asymptomatic) by Doppler examination on one hand and carotid phonoangiography and oculoplethysmography, used together, on the other hand. The angiographic examination, including the study of the extra cranial arteries and the intra cerebral vessels, was performed. It has shown that a stenosis (greater than or equal to 90% of an internal carotid artery was the only lesion on 65 patients (53.3%) and that in 57 cases (46.7%) there were multiple lesions. 96 patients (76 symptomatic - 20 asymptomatic) were operated on. 4 patients (4.2%) died but the mortality was none in the group of 20 asymptomatic patients. 19 patients refused the operation and we have noted 7 occlusions of the internal carotid artery and 2 patients died (10.2%). On 7 patients with a surgical contra indication we have noted 1 secondary occlusion. We have to consider a near total occlusion of the internal carotid artery as an emergency. Its diagnosis by non invasive techniques must be followed by heparin therapy and angiographic examination. The carotid endarterectomy will respect the external carotid artery patency.

Angiography↗