Blood Pressure Clinical Trial
Official title:
Effect of Local Anesthetic on Hemodynamic Measures During Nasal Surgery
1% Lidocaine with 1:100,000 to 1:200,000 of epinephrine is routinely injected into the nasal mucosa during nasal surgery to reduce patient blood loss and improve the surgical field and visibility. Typically 1% lidocaine with 1:100,000 of epinephrine is used in nasal surgery. However, 1 % lidocaine with 1:200,000 (which is a more dilute solution of epinephrine) is also used. This latter dose theoretically should have a lesser effect on cardiac stimulation which increases the heart rate and blood pressure at the time of surgery. The nasal mucosa has excellent absorbing ability which is great for the application of drugs but there is concern for systemic absorption and side effects. Potential serious side effects can occur with local injection such as hypertension, tachycardia, and cardiac arrhythmias. These side effects occur mainly through the absorption of epinephrine. It is the goal of this study to see if a weaker concentration of epinephrine (1:200,000) can maintain a good surgical field with a decrease in hemodynamic side effects.
Objective- To evaluate the effect of 1% lidocaine with 1:200,000 of epinephrine on
hemodynamic measures and bleeding in the surgical field in patients undergoing nasal surgery
compared to 1% lidocaine with 1:100,000.
Recruitment plan- Patients undergoing general anesthetic for nasal surgery (septoplasty or
sinus surgery) will be asked to participate in this study. All patients undergoing nasal
surgery are injected with local anesthetic into the nasal mucosa after induction of general
anesthetic. Those patients who agree to participate in the study will be randomized into 2
groups (injection either 1 % lidocaine with 1:100,000 or 1:200,000 of epinephrine).
Procedures
1. Patients will be put to sleep following standard general anesthetic protocol
2. Patients will be injected with either 1% lidocaine with 1:100,000 or 1% lidocaine with
1:200,000 into the nasal mucosa
3. After injection the following will be measured every 15 minutes for the first hour to
evaluate effectiveness of the local anesthetic.
1. Heart rate
2. Blood pressure
3. Routine ECG monitoring
4. MAP (mean arterial pressure)
5. Surgical field, degree of bleeding.
Alternatives- Subjects can refuse to participate in the study. If subjects refuse to
participate in the study they will still be injected with 1% lidocaine with 1:200,000 of
epinephrine which is standard of care
Data analysis- data will be compiled and statistical analysis will be made using PRISM
software.
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Observational Model: Cohort, Time Perspective: Prospective
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