Articles: nerve-block.
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Curr Opin Anaesthesiol · Oct 2023
ReviewMotor-sparing peripheral nerve blocks for hip and knee surgery.
To summarize the recent literature describing and comparing novel motor-sparing peripheral nerve block techniques for hip and knee surgery. This topic is relevant because the number of patients undergoing same day discharge after hip and knee surgery is increasing. Preserving lower extremity muscle function is essential to facilitate early physical therapy for these patients. ⋯ The use of motor-sparing peripheral nerve block techniques enables early ambulation, adequate pain control, and avoidance of opioid-related side effects facilitating outpatient/ambulatory lower extremity surgery. Further studies of these techniques for continuous peripheral nerve block catheters are needed to assess if extended blockade continues to provide motor-sparing and opioid-sparing benefits.
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Reg Anesth Pain Med · Oct 2023
Accuracy of injection pressure measurement at peripheral nerves using high-resolution 40 MHz ultrasound in an anesthetized porcine model.
Fluid injection pressure measurement is promoted as a marker of needle tip position that discriminates between tissue layers. However, clinical ultrasound has insufficient resolution to identify the exact position of the needle tip. Our primary objective was to use 40 MHz ultrasound in anesthetized pigs in order to precisely locate the tip of the needle and measure opening injection pressure in muscle, at epineurium and in subepineurium. ⋯ Needle tip position was not discernible using pressure monitoring. The circumneurium and subcircumneural injection compartment were observed but not intrafascicular injection.
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Observational Study
Opioid and Nerve Block Administration in Knee Arthroplasty: An Observational Retrospective Evaluation.
Increasing opioid-related adverse events and deaths have amplified interest in non-opioid analgesic options. Peripheral nerve blocks (PNBs) are useful in pain management, especially in minimally invasive day surgeries. This evaluation sought to examine patterns of opioid use among adult patients undergoing total knee arthroplasty, stratified by use of PNBs. ⋯ The results confirm best practices regarding opioid-sparing PNBs. Postoperative opioids are appropriate, but regimens incorporating PNB administration for total knee arthroplasty help reduce opioid use.