What is the web-space digital nerve block technique?

Updated: May 16, 2018
  • Author: Dmitry Volfson, DO; Chief Editor: Meda Raghavendra (Raghu), MD  more...
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Answer

This method is very effective in achieving adequate anesthesia and is probably the least painful.

  • Place the patient’s hand on a sterile field with the palm down.

  • Hold the syringe perpendicular to the digit and insert the needle into the web space, just distal to the metacarpal-phalangeal (MP) joint (see image below).

    Needle position for web-space block. Needle position for web-space block.
  • Slowly inject the anesthetic in the dorsal aspect of the web space.

  • Slowly advance the needle straight down toward the volar aspect of the web space, slowly infiltrating the surrounding tissues of the web space (see video below). The needle should not pierce the volar aspect of the web space.

    Web-space block technique.
  • Withdraw the needle and repeat the procedure on the other web space of the involved digit.

  • The toes (except the great toe) can be effectively anesthetized in the same manner.


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