Internet remote control of pump settings for postoperative continuous peripheral nerve blocks: a feasibility study in 59 patients.

INTRODUCTION: During continuous peripheral nerve blocks, infusion adjustments are essential for postoperative analgesia without side effects. Beside, physicians and nurse visits related to pump's settings and monitoring are time consuming and costly. We hypothesized that a remote control of pump's settings, by telemedicine transmission, adjusted to patients' feedbacks, is feasible and interesting in optimizing patient's postoperative pain management. METHODS: Fifty-nine ASA physical status I and II patients were included. Ropivacaine 0.2% was infused during 72 h in CPNB catheters. After returning to the surgical ward, the patient was allowed to answer a 10 indicators questionnaire 3 times a day (8.00 AM, 2.00 PM, 8.00 PM), or unlimited on patient's demand. This information was transmitted from the pump to a server through the Internet. If one indicator was out of the predefined thresholds, the anesthesiologist in charge was immediately informed by texto on his cell phone. The anesthesiologist connected to the website, checked the data from the patient and modified the settings of the pump by remote control according to a written protocol. The changes need a secure access with a password and a confirmation. The number of settings changes, the time to realize the procedure and the adverse events related to the technique were noted. When the catheter was removed, the pump was unassigned to the patient and the data archived. RESULTS: Thirty sciatic, 24 femoral and 5 interscalene catheters were inserted in 59 patients. Five catheters were accidentally removed before the end of the 72-h period. The median VAS pain values at rest and during movement were respectively at 2 and 3. Sixteen patients complained about numbness promoting 2 (0-3) changes in pump settings; 9 about motor blockade with 1 (0-2) change; 5 about difficulties for physiotherapy with 1 (0-3) change. The mean time of pump settings modification after response to questionnaire or voluntarily patient's alert was 15 ± 2.2 minutes. Early physiotherapy in the surgical ward was totally uneventful in 54 patients. The mean value of satisfaction scale of the patients was 8.4 ± 1.6. No adverse event necessitated a postoperative analgesia technique change. CONCLUSION: Remote control pump's feedbacks and e-settings for postoperative analgesia using CPNB permitted a real adaptation to patients' needs, complaints and pain VAS values without nurse and physician physical intervention.

Continuous post-operative regional analgesia at home.

OBJECTIVE: Describe early discharge of patients treated with continuous perineural analgesia after orthopaedic surgery. METHODS: A prospective and descriptive study including 56 patients undergoing multiple orthopaedic procedures, who had received oral and written information and given informed consent. Literature on the topic was reviewed, a preliminary study performanced and home nurses were trained. The following blocks were performed: interscalene block (ISKT), infraclavicular block (ICKT), posterior popliteal sciatic block (PPKT) or tibial block at the ankle (TKT). The analgesic catheter (KT) was inserted pre-operatively with nerve stimulation technique. Blockade was induced with mepivacaine and surgery performed under regional anaesthesia. Postoperatively, an elastomeric pump delivering 0.2% ropivacaine(R) at 5 ml/h (tibial blocks) and 7 ml/h (other blocks) was implemented. Analgesic efficacy and side-effects were monitored for 24 hours (patient discharge on Day+1). Pain was evaluated using visual analogical scores (VAS) (0-100) every 12 hours; rescue analgesics were prescribed (propacetamol IV). Nurses ensured patient monitoring at home. Finally, each patient was asked a satisfaction score (0-100). RESULTS: Two patients were excluded. Twenty-one tibial blocks, 24 posterior popliteal sciatic blocks, 6 infraclavicular blocks and 3 interscalene blocks were performed. No major incidents were reported. VAS showed satisfactory post-operative analgesia. Median values (max-min) were measured every morning and evening on Day+1 and Day+2. Patient satisfaction was high: 89 (70-100). Hospitalisation costs analysis showed a 46 to 27% decrease in surgery-depending costs. CONCLUSIONS: Continuous, post-operative, perineural analgesia at home is safe and effective, less expensive with high patient satisfaction.

Dose-range effects of clonidine added to lidocaine for brachial plexus block.

BACKGROUND: Although addition of clonidine to local anesthetics can prolong pain relief after peripheral nerve block, a dose-range effect has not been determined. METHODS: Fifty-six outpatients undergoing carpal tunnel release were randomly assigned to receive in a double-blind fashion 45 ml of a mixture containing either 400 mg lidocaine plus saline or 400 mg lidocaine plus 30, 90 or 300 microg clonidine for axillary nerve block. In each group (n = 14), blocks were evaluated at regular time intervals to determine sensory and motor functions in the five nerve regions of the hand and forearm. Also, adequacy of the block for surgery, postoperative pain intensity, and side effects were evaluated. RESULTS: Compared with saline, each dose of clonidine reduced the onset time of sensory block and extended the field of adequate anesthesia. Ten minutes after injection, 30 microg clonidine was more effective than 90 microg clonidine in producing sensory blockade. Sedation occurred with clonidine 30 and 300 microg. Clonidine reduced the use of supplementary intravenous anesthetic agents for surgery and produced dose-dependent prolongation of analgesia, reaching a mean 770 min (range, 190-1440 min) for the largest dose. Clonidine also produced a dose-dependent decrease in systolic arterial pressure of up to -22.5% (range, -6.0 29.9%) of baseline. With clonidine, 300 microg, three patients had mean arterial pressure of <55 mmHg; four patients had episodes of arterial oxyhemoglobin saturation of <90%, and two others were not discharged because of hypotension. CONCLUSION: This study suggests that a small dose of clonidine enhances the quality of the peripheral blocks from lidocaine and limits the classical alpha2-agonist side effects to sedation.