Anesthesia
Conditions
Keywords
Anesthesia, Cocaine Use
Brief summary
In this prospective study, investigators plan to evaluate the outcome of general anesthesia in the context of patients with a positive cocaine urine test. Patients with a positive urine cocaine test who do not appear acutely toxic and have normal vital signs may not have an increased rate of perioperative complications during elective surgery compared to similar patients with negative urine cocaine screening tests. Patients who are chronic cocaine users may have a higher anesthetic requirement.
Detailed description
Patients with a history of cocaine abuse who are scheduled to undergo surgery at Parkland Hospital will be asked to provide a urine sample for a screening toxicology test on the day of surgery. Patients will also be asked to fill out a questionnaire with questions pertaining to their drug use history. The remaining aspects of perioperative care, including the general anesthetic technique, will be standardized for all patients and will not differ from the standard of care. The anesthesia faculty, resident, or CRNA will identify patients and obtain consent and ask the patient to fill out the questionnaire. This prospective study is intended to enroll about 300 cocaine positive and negative patients over a 2 year period. Blood samples will be collected for analysis of cardiac troponin T (cTnT) pre- and postoperatively.
Interventions
OTHERUrine cocaine negative
Preoperative urine cocaine negative
OTHERUrine cocaine positive
Preoperative urine cocaine positive
Sponsors
University of Texas Southwestern Medical Center
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to 70 Years
Healthy volunteers
No
Inclusion criteria
* 18-70 years old * ASA physical status classification 1 to 3 * Personal history of cocaine abuse * Scheduled for a non-emergent operation that requires general anesthesia * Vital signs within generally accepted ranges for normal \[HR 60-100, RR 12-20, SpO2 \> 96% on room air, BP 90-140/60-90 unless a diagnosis of hypertension is present, T 36-38 degrees) * Willing and able to consent in English or Spanish
Exclusion criteria
* Age less than 18 or older than 70 * Unable to give informed consent for participation in the study * Patient refusal * Monitored anesthesia care (MAC) or regional anesthesia planned * Pregnant or lactating * Emergent surgery * Acute cocaine intoxication based on clinical symptomatology (hypertension, tachycardia, agitation, delirium, hyperthermia) * History of cardiac disease including coronary artery disease (CAD) and cardiac dysrhythmia * History of stroke * History of seizure disorder * ESRD * Prison patient
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Adverse intraoperative cardiovascular events | Intraoperatively, from the time of anesthesia start until anesthesia end, generally 2-4 hours | Proportion of total anesthesia duration that mean arterial pressure (MAP) \<65 or \>105 |
| Adverse postoperative cardiovascular events | Postoperatively up to 24 hours | Increase in the postoperative troponin value compared to the patient¹s baseline preoperative troponin value |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| The percentage of volatile anesthetic used | Intraoperatively, from the time of anesthesia start until anesthesia end, generally 2-4 hours | Average minimum alveolar concentration sevoflurane |
Countries
United States
Outcome results
None listed