Multi-frequency detection of a dielectric object using flexible contactless RF sensors for tissue diagnosis.

The aim of this paper is to experimentally assess the capacity of radio-frequency flexible sensors to localize a dielectric object inside a fluid, which could be used as a non contact sensor detected to the detection or the monitoring a local modification of a tissue, such as a tumor or a lesion. The used sensor is an MRI-like antenna, which consists in a flat, flexible and low cost multi-turn split resonator (MTLR), which features a geometrically pre-determined resonance frequency. The MTLR is used here as a transmit and receive sensor monitored by a distant loop coil.

Imaging of a dielectric inclusion using a contactless radio-frequency inductive probe for tissue diagnosis.

In this paper, a contactless radio-frequency (RF) inductive probe is used to spatially localize and characterize a complex dielectric organic inclusion in a fluid. The effect of dielectric properties (DP) of this organic material is investigated experimentally and by numerical computations.The used RF probe is a 135 MHz 3 cm diameter and 10 cm long, cylindrical bracelet resonator, placed close to a water tank filled with deionized water which includes a 1.

[Perioperative management of a patient with an acquired von Willebrand syndrome].

We report the case of a man suffering from a monoclonal gammapathy with an acquired von Willebrand disease in a perioperative context. This pathology is rare, but is important to diagnose because of the possible haemorrhagic complications encountered. We describe the main therapeutic options available today to prevent bleeding during major surgery.

[Cerebral monitoring with somatosensory evoked potentials in carotid surgery. A review of 141 carotids].

Objective: To evaluate postoperative and mid-term results of carotid surgery (CS) with somatosensory evoked potentials (SEP) monitoring.

Methods: Between 1998 and 2006, 141 CS in 124 patients were performed under general anesthesia. Selective shunting was based on SEP abnormality.

Cerebral monitoring of somatosensory evoked potentials during carotid surgery: a review of 100 cases.

The purpose of this study was to evaluate immediate and middle-term results of surgical carotid artery revascularization (CAR) with cerebral monitoring of intraoperative somatosensory evoked potentials (SEPs). Between 1998 and 2004, a total of 100 CARs in 86 patients were performed under general anesthesia with SEP monitoring. A shunt was inserted if SEP amplitude decreased by 50% or latency time increased by 10%.

[BIS monitoring may allow the detection of severe cerebral ischemia].

Purpose: To show that the bispectral index (BIS) is not only a monitor of the depth of anesthesia but that acute decreases of the index may be related to severe cerebral ischemia.

Clinical Features: Several clinical observations suggest that an unexplained fall of the BIS may be the result of cerebral ischemia. Somatosensory evoked potentials decreased in parallel to the decrease in BIS during carotid clamping in a 58-yr-old patient undergoing carotid endarterectomy.

[Continuous infusion of vancomycin in post-neurosurgical staphylococcal meningitis in adults].

Eight adult patients with post-surgery meningitis caused by methicillin-resistant staphylococci were treated with continuous intravenous infusion of vancomycin in mean doses of 50 mg/kg/day. This treatment, which lasted 3 to 6 weeks, was well tolerated by the kidneys and resulted in cure in all cases; its effect on the ear was not evaluated. Stable concentrations of 4 to 7 mg/l in cerebrospinal fluid were obtained after the 48th hour of treatment.

[The value and limitations of autotransfusion in traumatology].

29 autotransfusions were realised in severe cases of trauma (20% of a sample of 143 traumatic emergencies). The recovery of haemothorax blood as well as the peroperative collection by a Cell Saver allowed the retransfusion of 1989 +/- 1,838 ml (225-7070 ml) of autologous blood, amounting to 56% of the average blood loss. A total of 69% of the patients received homologous blood.