A Study on Analgesia and Related Outcomes for Patients With Tabacco Smoking

Kaohsiung Veterans General Hospital.300 enrolled

Overview

Numbers of postoperative PCA(Patient-Controlled Analgesia) related side effects among current, past and non smokers are determined by comparing and analyzing frequency distributions. To determine whether smokers require more post operative opiate analgesics than others. Multivariate analysis will be performed to identify the major and the minor factors predicting the use of postoperative pain therapy. Our previous related study showed that the smoker male patients consumed more analgesics than those without smoking, but the female group showed the similar findings. However, the case number, especially the female cases, is underpowered. Investigators hope to increase the case number to have a better statistical and clinical significance.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Enrollment

300

Conditions

Current Smokers Past Smokers Never Smokers

Interventions

Eligibility

Sex: ALLMin age: 20 YearsMax age: 80 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Patients undergoing elective general surgery are assigned to current smokers（n=100） or past smokers（n=100） or never smokers（n=100） according to the questionnaires "Fagerstrom test for nicotine dependence" 1 day prior to the surgery. Exclusion Criteria: * the patients undergoing major thoracic cardiovascular surgery * the patients with significant lung lesion * the patients with conscious disturbance * the patients with allergic history to morphine

Outcomes

Primary Outcomes

Fagerstrom test for nicotine dependence

Time frame: Post-operation Day1 to Day4

Secondary Outcomes

Differences in pain intensity between the three groups after postoperative analgesia.

Patients will give a pain score from 0 to 10. 10 is the most painful score.