Muhammad Nahar, Md Shahid
(2008)
A comparison of the effectiveness and success
rate between prelocation of the nerves using
percutaneous electrode guidance vs conventional
technique for 3 in 1 block.
Masters thesis, Universiti Sains Malaysia.
Abstract
Peripheral nerve block provide analgesia and
anaesthesia but the procedure itself can produce pain and discomfort to the patient This
study evaluated the effectiveness of PEG for the prelocation of the nerves in the 3 in I
block before nerve stimulator needle is introduced. The specific objectives of the study
are to compare between PEG group and conventional group in terms of success rate,
mean duration of performing 3 in I block, onset of blockade and number of attempts and
redirection of nerve stimulator needle Prospective randomized single blinded study. Seventy orthopaedic patients
with lower limb procedure were divided into 2 groups, group l (n=35) prelocation with
PEG, group 2 (n=35) no prelocation/ conventional. Local anaesthetic agent used was
10ml 1% Lignocaine and 20ml 0.375% Ropivacaine There was no significant difference in success rate and mean duration of
performing the 3 in 1 procedure, P value> 0.05. However the onset of sensory blockade
was statistically significant, P value < 0.05, where group 1 patients (prelocate with PEG)
showed faster onset than group 2 patients (without PEG). Group 1 also had statistically
significant less number of redirection of nerve stimulator needle The use of PEG is effective in identifying the nerves with evidence of
faster onset of blockade and reduces number of redirection of nerve stimulator needle but
there was no statistically significant difference in success rate and duration of performing
3 in I block compared to conventional technique.
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