Multicenter study on invasive Streptococcus pyogenes infections in children in Argentina.

Introduction: Invasive Streptococcus pyogenes infections (ISpIs) cause a high morbidity and mortality, even at present; however, at a regional level there are few publications on this subject in the field of pediatrics.

Objective: To describe the prevalence, predisposing factors and clinical characteristics of children hospitalized for ISpI, and analyze risk factors associated with bacteremia and lethality. Material and methods.

Iatrogenic axillary artery injury from humeral neck fracture repair. A rare and unusual event in which and aggressive strategy was mandatory to save a child limb.

Humeral neck fracture is rarely associated with injury of the nearby axillary artery and in the English literature only 29 such cases have been reported. An injury of the distal axillary artery secondary to reduction and fixation of a humeral neck fracture is a very rare and unusual complication, to the best of our knowledge has never been reported in literature. In this paper we report the case of entrapment of the distal axillary artery in the humerus rhyme fracture in a 9-year-old child who suffered a nighttime car-accident with her father.

[US-guided percutaneous management of femoral artery pseudoaneurysms by thrombin injection: personal experience and review of the literature].

Treatment of femoral artery pseudoaneurysms includes US-guided compression, endovascular coil embolisation or stenting, thrombin injection and open surgical repair. Thrombin injection is currently the standard approach to all non-complicated pseudoaneurysms of the peripheral arteries. Between January 2001 and December 2004, 59 pseudoaneurysms of the femoral artery were submitted to percutaneous US-guided thrombin injection in our surgery division.

Endovascular repair of intrathoracic left subclavian artery aneurysm with stent grafts: report of a case and review of the literature.

At present, the standard management of subclavian artery aneurysms is surgical repair. Endovascular treatment of these aneurysms with implantation of a covered stent graft is a relatively new technique that appears to be both feasible and safe. We present the case of a large true aneurysm of the left intrathoracic subclavian artery that was successfully treated with two stent grafts on March 2001.

Diagnostic accuracy of ultrasound dilution access blood flow measurement in detecting stenosis and predicting thrombosis in native forearm arteriovenous fistulae for hemodialysis.

Background: Vascular access surveillance by ultrasound dilution blood flow rate (Qa) measurement is widely recommended; however, optimal criteria for detecting stenosis and predicting thrombosis in arteriovenous fistulae (AVFs) are still not clearly defined.

Methods: In a blinded trial, we evaluated the accuracy of single Qa measurement, Qa adjusted for mean arterial pressure (Qa/MAP), and decrease in Qa over time (dQa) in detecting stenosis and predicting thrombosis in an unselected population of 120 hemodialysis subjects with native forearm AVFs (91 AVFs, located at the wrist; 29 AVFs, located at the midforearm). All AVFs underwent fistulography, which identified greater than 50% stenosis in 54 cases.