The goal of this observational cohort study is to evaluate whether the COPD Assessment Test (CAT) score can predict the risk of perioperative respiratory complications in patients aged 40 to 70 years with diagnosed Chronic Obstructive Pulmonary Disease (COPD), undergoing elective surgical procedures lasting no longer than 150 minutes.
The main questions it aims to answer are:
* Is there a statistically significant association between preoperative CAT scores and the incidence of intraoperative and early postoperative respiratory complications in COPD patients?
* Can the CAT score be effectively used as a preoperative risk stratification tool to guide anesthetic and surgical decision-making?
Researchers will compare two patient groups based on CAT scores: those with CAT \<10 and those with CAT ≥10 to determine whether higher CAT scores are associated with an increased incidence of perioperative respiratory complications.
Participants will:
* Complete the CAT questionnaire during the preoperative evaluation
* Undergo elective surgery with an expected duration of ≤150 minutes
* Be monitored intraoperatively for bronchospasm, oxygen desaturation, and ventilation difficulty
* Be monitored postoperatively (within the first 72 hours) for hypoxemia, reintubation, bronchospasm episodes, postoperative pneumonia, intensive care unit (ICU) admission, and length of hospital stay
* Have perioperative clinical data collected and analyzed for comparative outcomes between CAT score subgroups
Who can participate
Age range
40 Years – 70 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Patients aged between 40 and 70 years
* Diagnosed with stable-stage Chronic Obstructive Pulmonary Disease (COPD) according to GOLD criteria
* Scheduled for elective surgical intervention
* Classified as ASA Physical Status II or III according to the American Society of Anesthesiologists (ASA)
* Planned for postoperative follow-up and eligible for at least 72 hours of observation
* Undergoing surgery with an expected duration of at least 150 minutes
* Willing to participate voluntarily in the study
Exclusion Criteria:
* Patients younger than 40 years or older than 70 years
* History of COPD exacerbation within the past 4 weeks
* Presence of severe cardiac failure (EF \<30%), end-stage renal disease, or active malignancy
* Neurological disorders or cognitive impairments
* Requirement for invasive mechanical ventilation in the preoperative period
* Altered consciousness or any condition preventing completion of forms before anesthesia
* Undergoing surgery with an expected duration longer than 150 minutes
* Unwillingness to participate in the study voluntarily
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Incidence of Postoperative Respiratory Complications Within 72 Hours