Ice Reduces Needle-Stick Pain Associated With Local Anesthetic Injection.

BACKGROUND: Local anesthetic injections are widely used in the emergency department for different purposes. Pain management for such injections is of great importance to both patients and the healthcare system.

OBJECTIVES: Our study aimed to determine the effectiveness and safety of cryotherapy in patients receiving local anesthetic injections.

METHODS: Subjects who presented with superficial lacerations were randomly assigned to 2 groups, the first group received ice packing prior to injection and the second did not. The pain severity, length and depth of the laceration, and the other necessary information before and after the pain-reducing intervention were measured, documented, and compared at the end of the study. Pain scores were measured using a numerical rating scale before and after the procedure, and the differences were compared using a t-test.

RESULTS: Ninety subjects were enrolled in the study, 45 in each group. There were no statistical differences between the 2 groups in terms of baseline preoperative and operative characteristics (P > 0.05). The pain scores in the cryotherapy group were significantly lower before and after the procedure (P < 0.001). There was no statistically significant difference between the 2 groups for wound infection (P = 0.783).

CONCLUSIONS: Cooling the injection site prior to local anesthetic injection is an effective and inexpensive method to reduce the pain and discomfort caused by the injection.