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Continuity of a Function01:23

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A function is continuous at a point a if three conditions are met: the function is defined at a, the limit of the function as x approaches a exists, and this limit equals the function’s value. Mathematically, this is written asThis definition ensures the graph of the function does not exhibit any breaks, holes, or jumps at that point. Discontinuities occur when any of these conditions fail. A removable discontinuity exists when the two-sided limit exists but the function is either...
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Anesthesia is a medical procedure that uses drugs for CNS suppression to enable painless surgeries and procedures. The selection of anesthetics is influenced by their pharmacokinetic properties, side effects, and patient characteristics. Various types of anesthesia include general, local, regional, spinal, and inhalational.
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Nerve plexuses are networks of interlacing nerves that serve as communication hubs to distribute and organize nerve action across various body regions. The nerve plexuses are organized into the cervical plexus located in the neck region, brachial plexus in the shoulder area, lumbar plexus found in the lower back, sacral plexus situated in the pelvis, and coccygeal plexus located in the coccygeal region.
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Related Experiment Video

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A New Hybrid Quantitative Evaluation Model for Axillary Junctional Hemorrhage in Swine
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[A new catheter set for continuous axillary plexus anesthesia].

D Mehler, B Otten

    Regional-Anaesthesie
    |April 1, 1983
    PubMed
    Summary

    A novel device enables continuous axillary plexus blocks using a loss-of-resistance technique for safer catheter placement. This minimizes risks of vascular puncture or nerve injury, improving pain management and surgical anesthesia.

    Area of Science:

    • Anesthesiology
    • Neurosurgery
    • Pain Management

    Context:

    • Continuous regional anesthesia techniques are crucial for effective pain control and surgical procedures.
    • Traditional methods for axillary plexus block carry risks of vascular or neural complications.
    • Developing safer and more reliable methods for continuous nerve blocks is an ongoing area of research.

    Purpose:

    • To introduce a new device designed for continuous axillary plexus block.
    • To enhance the safety and efficacy of catheter insertion into the neurovascular axillary sheath.
    • To provide a versatile tool for various clinical applications including pain management and anesthesia.

    Summary:

    • A new device facilitates continuous axillary plexus block via a loss-of-resistance method, similar to peridural anesthesia.

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  • It allows safe catheterization within the neurovascular axillary sheath, with a specialized FEP-Teflon cannula minimizing risks of vessel puncture or nerve damage.
  • The device is suitable for postoperative pain management, joint mobilization, sympathetic block for vascular diseases, and prolonged surgeries like plastic surgery.

    • Impact:

    • Improved safety profile for axillary plexus blocks, reducing potential complications.
    • Expanded applications for continuous regional anesthesia in postoperative care and chronic pain management.
    • Potential to enhance patient recovery and reduce reliance on systemic analgesics.