Lars Arendt-Nielsen1, Henrik Egekvist, Peter Bjerring. 1. Department of Health Sciences and Technology, Aalborg University, Laboratory for Experimental Pain Research, Center for Sensory-Motor Interaction, Aalborg, Denmark. LAN@smi.auc.dk
Abstract
BACKGROUND AND AIM: Needle injections are used daily by millions of people around the world for the administration of various drugs (e.g., insulin), venepuncture, and some neurophysiological procedures. The aim of this paper was to study the influence of the outer needle diameter on the pain evoked by controlled needle insertion. METHODS: An automated needle injection system was used to perform a series of insertions where velocity, angle of insertion, and depth of injection were controlled. The frequency of pain following needle insertions (23G, 27G, 30G, 32G) was recorded together with the pain intensity (measured using the visual analogue scale--VAS) and the occurrence of bleeding. RESULTS: The outer needle diameter was positively and significantly correlated to the frequency of the insertion pain; for example, 63% of insertions with 23G needles caused pain, 53% of insertions with 27G and 31% of insertions with the thinnest (32G) needle (p < 0.0001) caused pain. The thickest needle caused most insertions associated with bleeding. Bleeding insertions were approximately 1.3 times more painful (as indicated by VAS scores) than insertions without concomitant bleedings (p = 0.004). CONCLUSION: By decreasing the outer diameter of a needle, the frequency of insertion pain can be reduced and may encourage patients to adhere to demanding injection regimens such as recurrent insulin administration.
BACKGROUND AND AIM: Needle injections are used daily by millions of people around the world for the administration of various drugs (e.g., insulin), venepuncture, and some neurophysiological procedures. The aim of this paper was to study the influence of the outer needle diameter on the pain evoked by controlled needle insertion. METHODS: An automated needle injection system was used to perform a series of insertions where velocity, angle of insertion, and depth of injection were controlled. The frequency of pain following needle insertions (23G, 27G, 30G, 32G) was recorded together with the pain intensity (measured using the visual analogue scale--VAS) and the occurrence of bleeding. RESULTS: The outer needle diameter was positively and significantly correlated to the frequency of the insertion pain; for example, 63% of insertions with 23G needles caused pain, 53% of insertions with 27G and 31% of insertions with the thinnest (32G) needle (p < 0.0001) caused pain. The thickest needle caused most insertions associated with bleeding. Bleeding insertions were approximately 1.3 times more painful (as indicated by VAS scores) than insertions without concomitant bleedings (p = 0.004). CONCLUSION: By decreasing the outer diameter of a needle, the frequency of insertion pain can be reduced and may encourage patients to adhere to demanding injection regimens such as recurrent insulin administration.
Authors: Christopher Rini; Bruce C Roberts; Didier Morel; Rick Klug; Benjamin Selvage; Ronald J Pettis Journal: J Diabetes Sci Technol Date: 2019-03-17
Authors: Kevin J McHugh; Lihong Jing; Sean Y Severt; Mache Cruz; Morteza Sarmadi; Hapuarachchige Surangi N Jayawardena; Collin F Perkinson; Fridrik Larusson; Sviatlana Rose; Stephanie Tomasic; Tyler Graf; Stephany Y Tzeng; James L Sugarman; Daniel Vlasic; Matthew Peters; Nels Peterson; Lowell Wood; Wen Tang; Jihyeon Yeom; Joe Collins; Philip A Welkhoff; Ari Karchin; Megan Tse; Mingyuan Gao; Moungi G Bawendi; Robert Langer; Ana Jaklenec Journal: Sci Transl Med Date: 2019-12-18 Impact factor: 17.956