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Biomedical subjects

M Mezghani

Publications and source records attributed to M Mezghani.

11 recordsLinked to original sources
PubMed2006

[From diagnosis to treatment of gluteus medius tendon tear of the hip: a case report].

OBJECTIVE: To report a case of spontaneous gluteus medius tear repaired surgically in a 42-year-old woman patient without any other antecedent other than diabetes. PATIENT AND METHODS-RESULTS: Trochanteric pain evolving for 7 months led to scintigraphy objectifying a hyperfixation of the trochanter and ultrasonography showing an inflammatory gluteus medius tendon. These examinations were supplemented by magnetic resonance imaging and tomodensitometry visualising the tendon rupture but no marked fat degeneration of the muscle despite atrophy of this one. Surgical exploration confirmed the presence of a major rupture of the gluteus medius tendon, which was reinserted through an osseous trench. Rehabilitation involved protecting the tendon, by an installation of the member in abduction and passive mobilization from the third postoperative day, with a move to partial support on day 45. The result after 16 months was excellent, the patient returning to work 8 months after the surgery without any residual pain. CONCLUSION: The spontaneous rupture of the gluteus medius, often ignored, can occur in young subjects and induce limited function, often well corrected by reinsertion surgery.

Adult↗
PubMed2005

[The Oswestry index for low back pain translated into Arabic and validated in a Arab population].

OBJECTIVE: To translate into Arabic and validate the Oswestry index for low back pain in an Arab population. BACKGROUND: No functional disability index to assess low back pain written in the Arabic language and validated in an Arab population is available. DESIGN: Arabic translation of the Oswestry index was obtained by the "forward translation/backward translation" method. Adaptations were made after a pilot study involving ten patients aged 18 to 65 years old. Impairment outcome measures (pain as measured on a visual analog scale [VAS], Schober-McRae, index, duration of morning stiffness and number of night awakenings), disability (Quebec index, Waddell index), handicap (as measured on a VAS) and Beck depression scale scores were recorded. Inter-rater reliability was assessed by use of the intra-class correlation coefficient (ICC) and the Bland and Altman method. Construct validity was investigated with use of the Spearman rank correlation coefficient (convergent and divergent validity), and factor analysis was performed. Internal consistency was assessed by use of the Cronbach alpha coefficient. RESULTS: Eighty Tunisian patients with low back pain were included in the validation study. Two items were excluded. Inter-rater reliability was excellent (ICC = 0.98). Expected divergent and convergent validity results suggested good construct validity. Two main factors were extracted by factor analysis and explained 58.19% of the cumulative variance: the first factor represented discomfort in dynamic activities, the second discomfort in static activities. The Cronbach alpha coefficient was 0.76 for factor 1 and 0.70 for factor 2. CONCLUSION: We translated into and adapted the Oswestry index for the Arabic language in a population of Tunisian women? with low back pain. The 8-item version is reliable and valid. Although the scale was validated in a Tunisian population, we expect that it is suitable for other Arab populations, especially North Africans. Further study is needed to confirm such a hypothesis.

Adolescent↗
PubMed2001

Purification and sequence analysis of the atypical maltohexaose-forming alpha-amylase of the B. stearothermophilus US100.

The maltohexaose-forming alpha-amylase, of B. stearothermophilus US100, was purified to homogeneity by a combination of osmotic shock, starch adsorption and anion exchange chromatography. This enzyme has a relative molecular mass of 59 kDa. The analysis of the nucleotide sequence, of the corresponding gene, allowed the identification of a single open reading frame encoding a 549 amino acid protein, exhibiting a large homology to the other B. stearothermophilus alpha-amylases. This homology reaches a maximum with those of DY-5 and DN1792 strains with respectively 3 and 4 aa different over 549. The relatively small differences, between Amy US100 and that of DN1792 strain, take in more importance since we have demonstrated that these enzymes differ essentially by their starch hydrolysis pattern.

Journal Article↗
PubMed1985

[Effects of injectable nitroglycerin on atheromatous coronary stenoses].

The beneficial effects of glyceryl trinitrate (GTN) are the result of several mechanisms which reduce venous return, cardiac work and intraparietal tension, and redistribute blood flow to the subendocardial layer and ischaemic zones. A direct action on atheromatous coronary stenosis is disputed. The coronary angiogram of 45 patients with organic stenosis and no clinical or electrocardiographic signs of coronary spasm were studied under basal conditions and after intravenous injection of 1.5 mg of GTN. Eighty stenotic segments and the corresponding 80 prestenotic segments were traced for comparison after enlargement on a Vanguard retroprojector and calibrated with reference to the coronary angiographic catheter. Aortic pressure fell 2 minutes after the injection in all patients to return to initial values at the end of the investigation. The diameter of the stenosed segment increased in 17 cases, remained unchanged in 54 cases and decreased in 9 cases. When expressed as a percentage of stenosis, the narrowing increased in 25 cases, decreased in 16 cases and remained the same in 39 cases. In the cases aggravated by GTN the diameter of the stenosis decreased or remained the same, whilst the diameter of the prestenotic decreased; in the cases improved by GTN, the diameters of both stenotic and prestenotic segments increased and prestenotic segments showed only slight variations. There was no difference in the diameter of the prestenotic segments between the 3 groups, but the diameter of the stenotic segments was larger in the group aggravated by GTN in comparison with the other two groups. Different haemodynamic factors and neurotumoral and local metabolic autoregulatory mechanisms may be activated by GTN.(ABSTRACT TRUNCATED AT 250 WORDS)

Coronary Angiography↗