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Biomedical subjects

M Boiron

Publications and source records attributed to M Boiron.

At least 109 records · Page 6Linked to original sources
PubMed1982

[Relation between the electrical and mechanical activity of the stomach. In situ study of the anesthetized rat].

The relations between the electrical and mechanical activity of the corpus and the antrum have been studied by means of several microelectrodes and enterographic transducer under binocular control (X 5) in anaesthetized rats (pentobarbital Na, 4 mg/kg). The recording period starts from 30 min after the onset of anaesthesia. This time corresponds to the release of the post operative inhibitions. Several rhythms of slow components have been in evidence thanks to a long time constant (5 sec): the dominant component with his frequency 4.04 +/- 1.06 c/min (n = 302 values). This frequency increases (5.11 +/- 1.3 c/min) during the antropyloric evacuation. Other rhythmic components of smaller amplitude (less than 200 microV) and frequency ranging between 7-16 c/min have been seen in quiescent conditions. In contractile state, the incidence of such rhythms decreases. The weakest manifestations of mechanical activity consist of small rhythmic variations of volume, the frequency corresponding to the main gastric rhythm of 4.5 c/min; however any spiking activity is observed. The second step of activity is the peristalsis (speed: 1 mm/sec), the circular contractility is accompanied by small spikes (less than 200 microV) in short salves. The third step is marked by the antral contraction with an important volume of variation, spike bursts of greater amplitude and biphasic slow wave are recorded. The antral activity is followed by a break of the main rhythm activity during 20 sec. These activities appear as a result from a structuration of local oscillators of relatively high frequency, in this species.

Animals↗
PubMed1982

[Hodgkin's disease in childhood: long term results].

Between 1965 and 1976, 83 previously untreated children aged 15 years and under, with biopsy-proven Hodgkin's disease (HD) were evaluated, treated and followed at Hospital Saint Louis, Paris. Clinical stages were IA-IIA for 59 patients, IB-IIB for 19 patients and III-IV for 5 patients. Two main kinds of treatment were used: monochemotherapy-radiotherapy (MCT-RT) for 26 patients who have received mantle field irradiation followed by a monthly Vinblastine injection during 3 years; 57 patients have received a combination of MOPP and radiotherapy (MOPP-RT). The MOPP-RT treated patients have a significantly better survival and relapse free survival than the MCT-RT treated patients (86.9% vrs 76.1% and 83.5% vs 65.4%). Thirteen relapses were observed after a median complete remission of 30 months: 6 patients are now free from disease and one is still under treatment. Ten patients are dead after a 55 months median survival: 7 died from H.D. and 3 from treatment toxicity. No 2nd cancer or leukemia were observed until now. The main long term complications of therapy were sterility in male patients, growth defects and disturbances of thyroid functions.

Adolescent↗
PubMed1982

[Children born of leukemic parents. Apropos of 23 children].

We have studied the children born of leukemic parents who treatment had stopped. In total, 8 women (3 acute myeloblastic leukemias and 5 acute lymphoblastic leukemias) who gave birth to 11 children, and 6 men (all with acute lymphoblastic leukemias) who fathered 12 children were studied. Of these 23 children, two have a severe congenital malformation, one congenital hypopituitarism associated with mid-line defect, and one laparoschisis, and also two benign abnormalities were observed. The children with abnormalities had a leukemic mother, whilst no leukemic father had an abnormal child. It is well known that the toxic effect of chemotherapy is different in the male and the female gonad. These results are compared to those in the literature, and at present it appears difficult to form a clear opinion on the delayed teratogenic effect of chemotherapy. Fecundity and the risk for future generations are unknown. The opening of an international registry would be useful.

Abnormalities, Drug-Induced↗
PubMed1981

[Autoimmune thrombocytopenic purpura. Clinical and therapeutic retrospective study of 544 cases (author's transl)].

A retrospective study of 544 patients with autoimmune thrombocytopenic purpura showed that 81 had immunological abnormalities (antinuclear factors and/or positive direct Coombs; test and/or anti-smooth muscle antibodies). After one year, 58-8% of all patients were still in complete remission, irrespective of treatment. The outcome of the disease was studied in relation to therapeutic regimens. Prognosis was worst in patients with immunological abnormalities, since 11% died as compared with 4% of the whole patient population. Most relapses occurred during the first two years following remission.

Adolescent↗
PubMed1981

[Hodgkin's disease in children: long-term therapeutic results (author's transl)].

Between 1965 and 1976, 83 previously untreated children aged 15 years and under, with biopsy-confirmed Hodgkin's disease were assessed, treated, and followed-up at Hoôpital Saint-Louis, Paris. Clinical stages were IA-IIA for 59, IB-IIB for 19, and III-IV for 5 patients. Two main types of treatment were used: - monochemotherapy-radiotherapy in 26 patients who received mantle field irradiation followed by monthly vinblastine injections for 3 years; - 57 patients received a combination of MOPP and radiotherapy. The MOPP-radiotherapy treated patients have a significantly better survival and relapse-free survival than the monochemotherapy-radiotherapy treated patients (86.9 p. cent vs 76.1 p. cent and 83.5 p. cent vs 65.4 p. cent). Thirteen relapses were observed after a median complete remission period of 30 months: 6 patients are now free from disease and one is still under treatment. Ten patients died after a 55 months median survival: 7 died from Hodgkin's Disease and 3 from treatment toxicity. No secondary cancer or leukemia has been observed. The main long-term complications of therapy were sterility in male patients, after chemotherapy, and growth defects and disturbances of thyroid functions after radiotherapy.

Adolescent↗
PubMed1981

Indications for bone marrow grafting.

Bone marrow transplantation has found during the last decade his major indications which are severe aplastic anemia and acute leukemia in complete remission. For the time being, bone marrow transplant is feasible only if the patient has an HLA identical sibling. Efforts are being made to improve the prognosis of complications such as graft versus host disease and interstitial pneumonitis. The long term survival currently obtained is over 50 per cent.

Acute Disease↗
PubMed1981

Bone marrow transplantation in 65 patients with severe aplastic anemia.

This articles summarizes the experience of the Hospital Saint-Louis Bone Marrow Transplantation Team of bone marrow transplantation in severe aplastic anemia. Sixty-five consecutive patients have been transplanted with an HLA identical sibling marrow. Various conditioning regimen have been used. Conditioning regimen using high dose Cyclophosphamide alone or associated with Procarbazine and anti-thymocyte globulin gave a high number of bone marrow graft rejection. Therefore, a conditioning regimen using Cyclophosphamide and total body irradiation with lung shielding has been used for the last three years. This regimen suppressed bone marrow graft rejection. The main problems remain graft versus host disease and intercurrent infections. Despite these complications, 50 per cent of the patients become long term survivors and are apparently cured of their initial disease.

Adolescent↗