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Biomedical subjects

M Aubert

Publications and source records attributed to M Aubert.

At least 55 records · Page 3Linked to original sources
PubMed1993

[A comparative study of recovery following maintenance of anesthesia with propofol or isoflurane. An attempt to synthesize current data].

Quality of recovery is a means to improve anaesthetic safety during postoperative time, in post-anaesthesia recovery room and especially when the patient returns to his unity. The comparison of recovery after maintenance of anaesthesia with propofol or isoflurane shows that, for 50 to 60 min surgical procedures, results are significantly better with isoflurane. Review of literature shows that, for less than 30 min operations, propofol seems to give best recovery. For more than 30 min operations, isoflurane enables better quality recovery.

Adolescent↗
PubMed1993

[Ambulatory anesthesia in the elderly].

The aim of ambulatory anaesthesia in elderly is to reduce consequences of an interruption of their life habits. Medical and social selection criteria must be rigorous in order to obtain a great benefit comparing with short hospitalization. No previous significant study has been yet published to precise the place of this technique and its benefits for these patients.

Aged↗
PubMed1992

Echinococcus multilocularis: immunological study on the "Em2-positive" laminated layer during in vitro and in vivo post-oncospheral and larval development.

Echinococcus multilocularis oncospheres, primary vesicular cysts, and protoscolices were assessed in vitro and in vivo for their potential to synthesize a PAS-positive laminated layer containing monoclonal antibody (mAb) G11-binding Em2 antigen. The presence of Em2 antigen in developed oncospheres and cysts was subsequently correlated to the potential of in vivo development into a secondary metacestode in recipient host mice, which also responded by anti-Em2 serum antibody formation. In contrast, protoscolices failed to develop the "Em2-positive" layer in vitro under the selected experimental conditions. The failure to develop subsequently in vivo into a secondary metacestode was underlined by a lack of anti-Em2 serum antibody formation by the hosts. We furthermore developed a technique to obtain E. multilocularis clones by inoculating single oncospheres into recipient mice.

Animals↗
PubMed1992

[Fatal poisoning caused by African viper's bite (Echis carinatus)].

The case is reported of a 44-year-old European who was bitten on the foot in Djibouti, probably by an African viper. Unusually, there wasn't any pain, nor any cardiovascular collapse nor any local swelling. An oedema of the lower limb started the day afterwards. Two days after the bite, the patient presented a generalized haemorrhagic syndrome, which led to his admission. There was a consumption of fibrinogen and prothrombin, without any decrease in the platelet count. Heparin was started (100 IU.kg-1.day-1), as well as fluid replacement (albumin, fresh frozen plasma, packed red cells). This allowed him to be transferred to France, where he arrived in anuria, with hyperpyrexia, and severe lower limb oedema and a haemorrhagic syndrome. There was a major extensive retroperitoneal haematoma spreading to the perineum. The four limbs were ischaemic. The patient's condition continued to worsen, developing hypoxic pulmonary oedema. He died on the seventh day after the bite, during a session of haemodialysis, from cardiovascular failure resistant to all the usual drugs. The principles of anti-venom therapy are recalled. Indeed, this should be started early enough and relies on large amounts of serum (greater than 50 ml).

Adult↗
PubMed1992

Rabies vaccines for veterinary use: difficulties in establishing potency acceptability thresholds.

The variability of a control test is sometimes difficult to assess. In fact this variability should be considered as a common basis of any biological test. The example of the NIH or PER test is given for veterinary rabies vaccines. The same acceptability threshold is accepted by everybody, both producers and control laboratory. But biological variability should induce the producers to determine a "working acceptability threshold" higher than the conventional one. This safety margin should be determined by the producer to counterbalance the variability of the test both in the producer and control laboratories so that most batches submitted to the official control are accepted. On the other hand, control laboratories should fulfil two "fair" requirements: reveal their flow charts and their margin of error to allow the producer to make the needed adjustments; reduce as far as possible the uncertainty of control tests by using the most accurate statistical interpretation to allow the producers to establish a "working acceptability threshold" not too much higher than the official one.

Animals↗
PubMed1991

[Failure of medical treatment with antihypertensive agents in a child with pheochromocytoma. Recovery after surgery].

Anaesthesia for removal of pheochromocytomas requires preoperative preparation of patients so as to normalize blood pressure. During operation, hypovolemia linked with the sudden fall of circulating catecholamines as well as hypertension during handling of the tumor are to be managed. A case of a 11 year child with pheochromocytoma is reported. Once the diagnosis had been established, various attempts to normalize blood pressure failed. Despite a precarious condition, the operation could be performed. During surgery, hypertension occurred and three hypotensive drugs failed to correct it. It ceased after removal of the tumor. The postoperative course was uneventful. The authors discuss the role of the type of catecholamines and their concentration in the failure of antihypertensive medication.

Adrenal Gland Neoplasms↗
PubMed1991

[Behavioral ecology of the transmission of rabies].

Red fox behavioural ecology was studied in a rabies-enzootic area in order to determine how population size is balanced despite rabies-induced mortality. The results suggest that the red fox rabies virus equilibrium evolves, and is due to the solitary behaviour pattern of the fox which reduces the risk of virus transmission from on territory to another; and to the subsequent autumn dispersal, which allows the local fox population to recover in the space of under a year. The hypothesis is put forward that rabies does not seem to regulate fox population size. There would therefore be no reason to fear a population explosion after oral immunisation of foxes against rabies.

Animals↗
PubMed1990

A simple serum galactosyltransferase assay method suitable for routine use.

UDP-Galactose: N-acetylglucosaminyl glycoprotein beta 1-4 galactosyltransferase (GT) catalyzes the transfer of galactose to N-acetylglucosamine from UDP-[3H]Gal. The uncharged reaction product (tritiated N-acetyllactosamine) is separated from the unreacted UDP-[3H]Gal by ion-exchange chromatography. The major advantage of this method is its rapidity compared to other isotopic techniques.

Chromatography, Ion Exchange↗
PubMed1990

Use of vaccinia rabies recombinant for oral vaccination of wildlife.

A vaccinia rabies recombinant virus was constructed and shown to induce the synthesis of rabies virus glycoprotein in infected cells and to induce rabies virus neutralizing antibodies and protection in susceptible animals. Active when orally administered, this recombinant is a good candidate for the development of vaccines for wild animal rabies vectors. This recombinant was found stable, safe for target and non-target animal species, and protective for most of the rabies vectors. After extensive experimental studies conducted under controlled conditions, it as used in limited field trials and in an extensive open field trial. The preliminary results confirmed its basic properties and potential for rabies eradication.

Animals↗
PubMed1990

[Can we reduce the number of exploratory thoracotomies using mediastinoscopy?].

Between 1975 and 1988, 965 cases of bronchogenic carcinoma were submitted to surgery. A cervical mediastinoscopy (CM) was performed in 548 cases (57%). A nodal involvement was found in 35% of these 548 cases, thus 4 patients out of 5 did not undergo thoracotomy. One patient out of 5 underwent a thoracotomy in case of right ipsilateral and intranodal metastasis. Among 803 thoracotomies,-sixty were purely exploratories (7.5%), mainly because of a non resectable tumor. The rate of exploratory thoracotomy (ET) is decreasing (1975-1977 = 15%, less than 5% in recent years) as the rate of CM is increasing (1975-1979: 10-20%, 60-70% in recent years). The study of 60 cases of ET shows that 16 upon 39 performed CM revealed some nodal or mediastinal involvement. Nevertheless, among these 16 patients, the need of thoracotomy was under the pressure of necessity. Twenty-three patients had a negative CM: half of them had a left upper lobe carcinoma. Thus CM was inefficient to establish nodal mediastinal involvement in these cases.

Bronchial Neoplasms↗
PubMed1989

[Treatment of reflex algoneurodystrophies by sympathetic blockade with guanethidine].

Reflex sympathetic dystrophy (RSD) can be treated by regional sympathetic blockade with guanethidine. This method was used systematically in 25 patients with post-traumatic RSD of the upper (n = 8) or lower limb (n = 17). Sixty three blocks were performed, each patient receiving 1 to 4 blocks. The results were appreciated by the effects after one month on pain, mobility and trophic changes. They were excellent in 7 cases, good in 4 cases and poor in 7 cases. The results were better in moderate RSD without psychiatric overlay. Thirteen patients were cured after 3 months. Pain decreased significantly 2 days after injection in 28 of the 63 blocks. The effects on mobility and trophic changes always occurred after the analgesic effect. No side effects were observed with the exception of one patient who had a convulsion 2 hours after the injection. These results show that regional sympathetic blockage with guanethidine is useful for the treatment of RSD, especially in its moderate stages. In view of the negligible risks and its efficacy, the authors consider it to be the first line treatment of moderate RSD.

Adult↗
PubMed1988

Serum galactosyltransferase activity with three acceptors in ovarian cancer patients.

Several laboratories have demonstrated the usefulness of serum galactosyltransferase as a biological marker for ovarian neoplasms. However, contradictory results have been published recently, which might be partially explained by differences in methodology. We thus decided to measure serum galactosyltransferase activity in patients with ovarian cancer and benign gynecological diseases using three different assay systems. A very good correlation was obtained between the results of these assays. Furthermore, we confirm that serum GT is frequently elevated in cancer patients, and is of potential value for their follow-up.

Acetylglucosamine↗
PubMed1988

[Comparative study of various technics for the determination of human serum galactosyltransferase].

We have compared three assays for serum galactosyltransferase activity, which use ovomucoïd, asialo agalactofetuin and free N-acetylglucosamine respectively as exogenous acceptors. A very good correlation between the three assays is obtained, for the whole range of GT activity. When the methods are compared to one another, the slopes of the regression lines are similar whether the sera are collected from healthy controls, pregnant women, or women suffering from benign gynecologic diseases or ovarian neoplasms. The methods which uses free N-acetylglucosamine as acceptor is rapid, cheaper and easier to perform.

Female↗
PubMed1987

[Effect of the rate of injection of propofol on blood pressure and heart rate].

This work aimed to confirm the lack of haemodynamic effect due to the speed of injecting propofol during induction of anaesthesia. Thirty young unpremedicated ASA I patients were studied. They were randomly assigned to three groups. Induction was carried out with a single dose of 2.5 mg X kg-1 propofol, at three different speeds of injection (15, 30 and 45 s for groups 1, 2 and 3 respectively). Heart rate and systolic and diastolic blood pressures were recorded before injection and every 45 s after the end of the injection of propofol with a Doppler recorder. Statistical analysis of data was performed with Tukey's test. Systolic and diastolic arterial pressures decreased in all cases. There was an increase in heart rate which was not statistically different from control. There were no statistically significant differences between the median falls in blood pressure between groups.

Adult↗
PubMed1987

[Rupture of an intracranial aneurysm after spinal anesthesia].

A case is reported of an intracranial aneurysm which ruptured after spinal anaesthesia. A 36-year-old man underwent several locoregional anaesthesias for the surgical treatment of an infected lower limb fracture (8 epidural blocks and 1 spinal anaesthesia). After a further spinal anaesthesia, he suffered violent headaches, a meningeal syndrome, restlessness, left hemiplegia and coma. The relationship between such an accident and the anesthesia is discussed in the light of similar cases previously published.

Adult↗