This study involves people with respiratory disease who need to have a blood gas test, which requires taking blood from an artery. The study will test whether using mepivacaine, a medication that numbs the area where the needle is inserted, can help reduce pain during this procedure. Some participants will receive mepivacaine injected under the skin before the arterial puncture, while others will receive placebo or no treatment at all before the blood is drawn.
The purpose of the study is to find out if mepivacaine is effective in reducing the pain that patients feel when blood is taken from an artery for gas analysis. During the study, participants will be divided into different groups. One group will receive mepivacaine injected into the skin near the puncture site, another group will receive placebo, and a third group will not receive any injection before the arterial puncture. The study team will then measure and compare how much pain each group experiences during the procedure.
Participants will be adults between 18 and 80 years of age who are alert and able to understand the study. The mepivacaine will be given as a solution for injection under the skin, with a maximum dose of 200 milligrams for a single treatment session. The study will help doctors understand whether using this local anesthetic before taking arterial blood samples can make the procedure more comfortable for patients.
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