Articles: nerve-block.
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Rev Esp Anestesiol Reanim · Feb 2002
Case Reports[Infraclavicular brachial plexus block using a multiple injection technique and an approach in the cranial direction in a patient with anticipated difficulties in tracheal intubation].
A man with a pathologic diaphysial fracture of the middle third of the left humerus underwent emergency surgery for osteosynthesis of the fracture. Preoperative examination revealed that intubation would be difficult due to a history of radical surgery for epidermoid carcinoma of the oropharynx, and local-regional anesthesia was therefore considered. ⋯ Among the various levels of brachial plexus blockade, the infraclavicular option is little known and the least utilized, considering that one of its advantages is that the upper limb does not need to be moved for referencing (giving it an advantage over the axillary block) and that it has a lower incidence of pneumothorax (in comparison with a supraclavicular approach). Combined with a multiple injection technique and puncture in a cephalad direction, this solution allowed proximal surgery to be performed on the arm of a patient in whom intubation would have been difficult.
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Anesthesia and analgesia · Feb 2002
Randomized Controlled Trial Comparative Study Clinical TrialParavertebral blockade for minor breast surgery.
Paravertebral blockade (PVB) has been advocated as a useful technique for breast surgery. We prospectively compared the efficacy of PVB via a catheter technique with the efficacy of general anesthesia (GA) for minor breast surgery. Thirty patients were randomized into two groups to receive either PVB or GA. Variables of efficacy were postoperative pain measured on a visual analog scale, postoperative nausea and vomiting (PONV), recovery time, and patient satisfaction. Postoperative visual analog scale scores in the PVB group were significantly lower in the early postoperative period (maximum, 12 vs 45 mm; P < 0.01). In both groups, PONV was nearly absent. There was no difference in recovery time. Patient satisfaction was better in the PVB group (2.8 vs 2.3; scale, 0-3; P < 0.01). There was one inadvertent epidural block and one inadvertent pleural puncture in the PVB group. Although PVB resulted in better postoperative pain relief, the advantages over GA were marginal in this patient group because postoperative pain was relatively mild and the incidence of PONV was small. Considering that the technique has a certain complication rate, we conclude that at present the risk/benefit ratio of PVB does not favor routine use for minor breast surgery. ⋯ This study confirms the previously reported superior pain relief after paravertebral blockade (PVB) for breast surgery. However, considering the relatively mild postoperative pain and therefore the limited advantage of PVB for these patients, the risk/benefit ratio does not favor the routine use of PVB for minor breast surgery.
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Randomized Controlled Trial Comparative Study Clinical Trial
Randomized comparison of remifentanil-propofol with a sciatic-femoral nerve block for out-patient knee arthroscopy.
To evaluate preparation and discharge times as well as the anaesthesia-related costs of out-patient knee arthroscopy performed with a combined sciatic-femoral nerve block, or a propofol-remifentanil general anaesthetic. ⋯ In patients undergoing out-patient knee arthroscopy, the length of stay in the PACU can be shorter after a sciatic-femoral nerve block with a small volume of mepivacaine 2% compared with a propofol-remifentanil anaesthetic, and there is an increased likelihood that they will bypass the first phase of the postoperative recovery.
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Randomized Controlled Trial Clinical Trial
Clinical perception of phantom limb sensation in patients with brachial plexus block.
Patients' perception of limb position during regional anaesthesia is frequently incorrect. The incidence and nature of this phenomenon has not yet been completely described. The aim of this prospective study was to assess phantom sensation in patients undergoing a brachial plexus block. ⋯ Patients' perception of the position of the limb after axillary block in the majority of instances was probably due to persisting sensory inputs from the shoulder joint, which is not involved in this block. This is in contrast to supraclavicular or interscalene blocks. A significant number of patients experienced phantom limb sensation. They reported an arm position in fact related to the position of their arm before the axillary block.
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Anesthesia and analgesia · Feb 2002
An evaluation of the cutaneous distribution after obturator nerve block.
In 1973, Winnie et al. introduced the inguinal paravascular three-in-one block, which allegedly provides anesthesia of three nerves--the femoral, lateral cutaneous femoral, and obturator nerves--with a single injection. This concept was undisputed until the success of the obturator nerve block was reassessed by using evidence of adductor weakness rather than cutaneous sensory blockade, the latter being variable in its distribution and often absent. We performed this study, therefore, to evaluate the area of sensory loss produced by direct injection of local anesthetic around the obturator nerve. A selective obturator nerve block with 7 mL of 0.75% ropivacaine was performed in 30 patients scheduled for knee surgery. Sensory deficit and adductor strength were evaluated for 30 min by using sensory tests (cold and light-touch perception) and the pressure generated by the patient's squeezing a blood pressure cuff placed between the knees. Subsequently, a three-in-one block was performed, and the sensory deficit was reassessed. The obturator nerve block was successful in 100% of cases. The strength of adductors decreased by 77% +/- 17% (mean +/- SD). In 17 patients (57%), there was no cutaneous contribution of the obturator nerve. The remaining 7 patients (23%) had an area of hypoesthesia (cold sensation was blunt but still present) on the superior part of the popliteal fossa, and the other 6 (20%) had sensory deficit located at the medial aspect of the thigh. The three-in-one block resulted in blockade of the lateral aspect of the thigh in 87% of cases, whereas the anteromedial aspect was always anesthetized. By use of magnetic resonance imaging in eight volunteers, we demonstrated that the obturator nerve has already divided into its two branches at the site of local anesthetic injection. However, the injection of blue dye after having simulated the technique in five cadavers showed that the fluid regularly spread to both branches. We conclude that after three-in-one block, a femoral nerve block may have been assessed as an obturator nerve block in 100% of cases when testing the cutaneous distribution of the obturator nerve on the medial aspect of the thigh. ⋯ Previous studies reporting an incidence of obturator nerve block after three-in-one block may have mistaken a femoral nerve block for an obturator nerve block in 100% of cases when the cutaneous distribution of the obturator nerve was assessed on the medial aspect of the thigh. The only way to effectively evaluate obturator nerve function is to assess adductor strength.