Biomedical subjects

E Colin

Publications and source records attributed to E Colin.

16 recordsLinked to original sources

PubMed2006

Late effects of cycle competition on arterial stiffness. A preliminary study.

AIM: The purpose of this study was to examine the effects of a cycle competition on the large arteries stiffness, 24-hours after the end of the effort. METHODS: Two males elite cyclists were studied before and after performing a stage-race. Their heart rate (HR) was measured continuously during the two competition days. The impact of the competition on their vascular system was determined using the measure of pulse wave velocity (PWV), an index of regional arterial stiffness. HR and blood pressure were also measured before and 24-hours postexercise. RESULTS: During the race, mean cyclists HR were relatively similar. Changes in PWV and HR were found after competition: these measures increased for the offensive subject and decreased for the other. CONCLUSIONS: Despite their involvement in the same cycling competition, we suggest that the long-term effects induced by effort on arterial stiffness were inverted according to the subject's comportment during the race. This study should be completed by others measures in order to precise our results and to precise the possible link between arteries stiffness and the recovery kinetic process, both depending on the cardiovascular autonomic nervous system control.

Adult↗

PubMed2000

Balance of mass, momentum, and energy in splintering central collisions for 40Ar up to 115 MeV /Nucleon

For central collisions of (17-115)A MeV 40Ar+Cu, Ag, Au, an overall balance is determined for the average mass, energy, and longitudinal momentum. Light charged particles and fragments are separated into forward-focused and isotropic components in the frame of the heaviest fragment. Energy removal by the isotropic component reaches 1-2 GeV. For such high deposition energies, statistical multifragmentation models predict much more extensive nuclear disassembly than is observed.

Journal Article↗

PubMed1994

[Pituitary tumors: clinical presentation and evaluation of transphenoidal surgical treatment].

The clinical manifestations and the surgical treatment results of 280 patients (179 female), undergoing a total of 319 operations at the Asenjo Institute of Neurosurgery were retrospectively analyzed. The surgical approach for the first operation was transphenoidal in 89.3% of patients and transcraneal in the rest. Tumors were non-secretory in 169 (60.4%) patients, prolactinomas in 75 (27.8%) and produced acromegalia in 29 (10.4%) and Cushing syndrome in 7 (2.5%) patients. There was extraselar extension in 42% of women and 71% of men. The surgical treatment of prolactinomas corrected endocrine alterations in 25 of 29 and visual alterations in 18 of 27 patients assessed. Surgical treatment of acromegalia improved endocrine alterations in 11 of 13 and visual alterations in 4 of 10 patients assessed. Treatment of non secretory tumors corrected visual alteratons in 38 of 64 patients assessed. The principal complication of transphenoidal surgery was transient diabetes insipidus in 6.8% of patients. Overall mortality was 2.3% for transphenoidal surgery and 5.6% for transcraneal surgery. It is concluded that transphenoidal surgery is effective for the management extraselar complications of pituitary tumors and endocrine management of selected cases.

Adolescent↗

PubMed1992

The empty sella: results of treatment in 76 successive cases and high frequency of endocrine and neurological disturbances.

OBJECTIVE: We assessed the frequency of endocrine or neurological disturbances and the results of surgery in patients with empty sella, diagnosed with cisternography and/or computerized tomography scanning. DESIGN AND PATIENTS: Analysis of hospital records of 76 successive patients (73 primary, three secondary empty sella) from a single institution. MEASUREMENTS: Clinical and neuro-ophthalmological evaluation. Serum PRL, GH, TSH, LH, FSH, T4, T3 by radioimmunoassay. Diagnosis of empty sella with cisternography and/or computerized tomography scanning (n = 69), or discovered at surgery (n = 7). RESULTS: Patients with empty sella had: headache (69.7%), visual disturbances (34.2%), cerebrospinal fluid rhinorrhoea (11.8%), endocrine disturbances (51.4%, including hyperprolactinaemia, acromegaly, Cushing's syndrome). A pituitary tumour was discovered in two patients, in seven other ones it was suspected but not found at surgery. Transsphenoidal packing of empty sellas was done in 56 cases, with 7.1% post-operative complications. With surgery there was improvement of headache in 71%, of visual disturbances in 46%. Cerebrospinal fluid rhinorrhoea (discovered at surgery in four other patients) was not resolved by the first operation in six out of 13 patients. In 20 patients without surgery, headache improved in 64.6%. CONCLUSIONS: The empty sella is frequently associated with a variety of neurological and endocrine disturbances, which is contrary to conventional belief. Cerebrospinal fluid rhinorrhoea is not a rare complication and it may be difficult to treat. Some cases of empty sella may be due to partial pituitary apoplexy. Autoimmunity may have existed in other cases. Surgery may be useful in many patients, but a judicious selection is needed because it entails complications and non-operated patients may improve spontaneously.

Adolescent↗

PubMed1988