[Cardio respiratory arrest out of the hospital at the eldest]. / Arrêt cardiorespiratoire du sujet âgé en pré hospitalier.

BACKGROUND: The management of the older constituted a problematic that will be more attractive in the future because of the population's advanced age. AIM: To evaluate the management of the older more than 75 years that presented an arrest chest. METHODS: Retrospective study during 12 months (from the first January 2004 to 31 December 2004) and interested 15 regulation's documents; we studied demographic parameters, the cause and the time of called the evolution after cardio-respiratory resuscitation. RESULTS: We had 9276 called cases: 320 concerned patients more than 75 years (3, 45%) among 15 (4, 68%) had a chest arrest, the ratio sex was 0, 5 and the middle age: 78, 4 years. In the most cases; the called arrived by night (40%). The principal symptomatology was respiratory troubles (33, 33%); the outcome was fatal in all cases. CONCLUSION: The older over than 75 years had many pathologies that is why the prognostic of the chest arrest was very bad (mortality 100%), the gravity of the chest arrest was seen on this study so we must take seriously all the pathology presented by the older, multiplied the medical consultations to detect the complications earlier and to improve the life's quality.

Mechanical properties of glenoid cancellous bone.

BACKGROUND: Loosening of the glenoid component in total shoulder arthroplasty is the main late complication of this procedure; it may be assumed that it is highly dependent on the quality of the glenoid cancellous bone. Very little is known about the mechanical properties of this cancellous bone. The aim of this study was to determine these properties (Young's modulus and strength) as well as bone density in different parts of the glenoid cancellous bone to assess their variations. METHODS: Eleven scapulas were obtained from six fresh-frozen, unembalmed human cadavers. Eighty-two cubic cancellous bone specimens were extracted and tested using a uniaxial compression test; then the specimens were defatted and correlations with bone density were determined. FINDINGS: The study showed significant differences in the mechanical properties with anatomic location and directions of loading. Young's modulus and strength were found to be significantly higher at the posterior part of the glenoid with the weakest properties at the antero-inferior part. Cancellous bone was found to be anisotropic with higher mechanical properties in the latero-medial direction perpendicular to the articular surface of the glenoid. The apparent density was on average equal to 0.29 g/cm(3) with the higher values at the posterior and superior part of the glenoid. Good correlation between apparent density and elastic modulus was found only in the sagittal planes but not in the coronal and axial plane. INTERPRETATION: The mechanical properties determined in this study showed the anisotropy of the glenoid cancellous bone; values of these properties could provide input data for finite element method analyses in shoulder prosthesis designs.