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Biomedical subjects

F Liot

Publications and source records attributed to F Liot.

48 records · Page 3Linked to original sources
PubMedDate not supplied

[An electroencephalographic study of olfactory gonadic dysplasia (author's transl)].

The morphological functional and electrophysiologic findings of the report of olfactory gonadic dysplasia are reviews. The 11 cases are then presented with the analysis and interpretation of the EEG traces (17), as well as studies of olfactory activation of the EEF (6 subjects) and of afternoon sleep polygraphy (2 subjects). There is discussion of the possible sites of dysfunction in the mesencephalic-limbic structures which could be the source either directly or indirectly of the EEG modifications. Certain EEG abnormalities (interhemispheric asymmetry) alow the consideration that the pathogenetic mechanisms of the syndrome began during ontogenesis (in 5 of 11 subjects). Thereby suggesting that an electrophysiologic examination can be a valuable tool to pick up olfactory gonadic dysplasia early and to follow the hormonal treatment in the confirmed cases.

Adolescent↗
PubMedDate not supplied

[I.P.P.B. therapy at home in chronic respiratory insufficiency in France. I. Survey method. Description of the prescribers. 1960-1977 prescription evolution (author's transl)].

In order to assess the usage of IPPB therapy at home in chronic respiratory insufficiency in France, a mail survey has been conducted among 2,062 chest physicians and physicians involved in intensive care. The response rate was 57%. Among those caring for chronic respiratory insufficient patients, 296, i.e. 38%, have prescribed IPPB to 3,778 patients from 1960 till 1977. A study among a sample of the non-spontaneous-responders allows the estimation of about 400 physicians who prescribed IPPB on the whole for France at this time. Those who prescribed, worked more often in hospital though 4% had only a private practice. Those involved in intensive care prescribed more often than the chest physicians (47% versus 37%). The development of this therapy was different according to the different regions in France. But, in a general way, the prescription of IPPB at home particularly spread out since 1975, 65% of all the prescriptions have been done in 1975, 76, 77.

France↗
PubMedDate not supplied

[IPPB therapy at home in chronic respiratory insufficiency in France. II. Indications. Technics and surveillance (author's transl)].

A survey has been conducted among French chest physicians and physicians involved in intensive care. 296 physicians have prescribed IPPB at home to 3 778 patients with chronic respiratory insufficiency between 1960 and 1977. Acute respiratory failure was the first criteria considered in the indications (57% of the patients); hypercapnia, hypoxemia and right heart failure episode frequency were the other criteria of severity the most often taken into account. Since 1960, the indications among those with airflow obstruction have decreased, whereas they have increased for those with restrictive insufficiencies, expressing the questions raised about the efficacy of IPPB in these two types. 18% of the patients have had IPPB through tracheostomy canula. 70% of the patients have used a pressure cycling respirator and 30% a volume or flow cycling respiratory. This second type was quite always used in the case of IPPB through canula. Oxygen was added for half of the patients. The physicians have regularly followed the patients. Great importance was accorded to home care surveillance.

France↗
PubMedDate not supplied

[Mode of action and results of long-term assisted ventilation at home of chronic respiratory insufficient patients (author's transl)].

It is generally agreed that one assisted ventilation session has direct effects in chronic respiratory insufficiencies (C.R.I.) of chronic obstructive pulmonary diseases: hyperventilation where PaCO2 decreases and PaO2 increases, diminution of ventilatory work, reduction of cardiac output. Less is known, however, about the action on V and Q distribution and mechanics of breathing. The return to control values occurs quite rapidly after the end of the session. Long-term effects are much more questionable. Many publications in English have concluded that ona long-term basis, patients do not benefit from intermittent positive pressure. But, the daily assisted ventilation sessions usually lasted only a short time (1 h-1 h 30 in several sessions). According to a number of publications in French, assistance prolonged for several hours seems effective (decrease in the number of acute failures, annual hospitalization duration, more prolonged survival). However, a tracheostomy which enables assistance at night is often required. Results seem encouraging in the treatment of severe restrictive insufficiencies and particularly in the case of cyphoscoliotic patients. On the other hand, it is more difficult to draw a conclusion concerning chronic obstructive patients and further comparative studies are necessary in this direction.

Airway Obstruction↗
PubMedDate not supplied

[Changes in the spirography of paraplegics related to different postures in the air and water].

Respiratory insufficiencies in subjects with spinal cord injury were studied in five situations: in the air (sitting, dorsal supine position, declivous--15 degrees), and immersed in water up to the neck (sitting, dorsal supine position). Results were compared to those for a group of normal subjects. Total lung capacity (TLC), residual volume (RV), functional residual capacity (FRC), vital capacity (VC), forced expiratory volume per second (FEV1) and peak expiratory flow (PEF) were measured and their ratios with theoretical values of each subject were calculated. In handicapped subjects, FEV1 is less significantly diminished than VC and PEF. TLC does not vary, FRC is higher only sitting in the air, RV is more increased. Between situations, FEV1 never varies. In normal subjects, RV does not vary but, sitting in the air, TLC, VC, FRC and PEF increase. In handicapped subjects sitting in the air, VC decreases, RV and FRC increase, TLC and PEF do not vary. In normal and handicapped subjects, the other situations are comparable all together.

Adolescent↗