Minimal Effective Concentration of Lidocaine in Propofol Lidocaine Mixture for Relief of Pain on Propofol Injection

Study Overview
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Brief Summary
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The research will be carried out in order to determine the optimal lidocaine concentration in propofol lidocaine mixture to prevent pain on propofol injection during induction of general anesthesia using a modified Dixon's up-and-down method. We hypothesized that focusing on lidocaine concentration and not dose could be more convenient and valuable to alleviate pain with propofol injection. Patients & methods include assessment of severity of pain on propofol injection using nine concentrations of lidocaine in lidocaine propofol mixture in ASA I&II patients aged 16-60 years with excluxion of patients with history of drug allergy, hepatic or renal impairment, cardiac problems, neurologic deficits or psychiatric disorders. Demographic data, type and duration of surgery, Time for unconsciousness, volume of propofol-lidocaine mixture used, pain scale during injection, increase in heart rate and/or hand or forearm withdrawal during injection will be recorded and patient satisfaction (will be assessed in the recovery room after regaining consciousness),

Detailed Description
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The research will be carried out in order to determine the optimal lidocaine concentration in propofol lidocaine mixture to prevent pain on propofol injection during induction of general anesthesia using a modified Dixon's up-and-down method. We hypothesized that focusing on lidocaine concentration and not dose could be more convenient and valuable to alleviate pain with propofol injection. Patients & methods include assessment of severity of pain on propofol injection using nine concentrations of lidocaine in in lidocaine propofol mixture in ASA I&II patients aged 18-60 years with exclusion of patients with history of drug allergy, hepatic or renal impairment, cardiac problems, neurologic deficits or psychiatric disorders. Demographic data, type and duration of surgery, Time for unconsciousness, volume of propofol-lidocaine mixture used, pain scale during injection, increase in heart rate and/or hand or forearm withdrawal during injection, patient satisfaction (will be assessed in the recovery room after regaining consciousness),

Official Title
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Minimal Effective Concentration of Lidocaine in Propofol Lidocaine Mixture for Relief of Pain on Propofol Injection

Conditions
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Pain

Intervention / Treatment
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* Drug: lidocaine with propofol


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: ASA I &II Age 18 - 60 years Exclusion Criteria: study drug allergy hepatic or renal impairment cardiac problem neurologic deficits psychiatric disorders

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 60 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Interventional Model Description: clinical trial with a single arm
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: lidocaine with propofol<br> | Drug: lidocaine with propofol<br>* different concentrations of lidocaine added to propofol varying from<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| propofol injection pain | burning pain felt by the participant during injection of propofol according to pain scale including mild, moderate and severe pain degrees | during injection untill patient start loosing conciousness |