Mepivacaine vs. Bupivacaine Spinal Anesthetic in Total Knee Arthroplasty
Study Details
Study Description
Brief Summary
The purpose of this study is to determine if a shorter-acting spinal anesthetic called mepivacaine has advantages over a longer-acting medication called bupivacaine.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
| Phase 4 |
Detailed Description
Different medications last for different amounts of time and can be changed depending on the length of the procedure. A short acting spinal is generally used for procedures lasting less than 90 minutes. A longer acting medication would be any that lasts longer than 90 minutes. These medications not only block the signals that travel along the pain nerves, they also prevent the signals that tell the patients muscles to move. This means that after a total knee replacement a patient may delayed in their ability to get up and start walking early after surgery. Walking early in the recovery has been shown to decrease the rate of pulmonary embolism and death. Ambulating early is also important to prevent loss of strength, constipation, pneumonia and urinary retention.
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Experimental: Mepivacaine Spinal Anesthetic Mepivacaine 3 mL intrathecal injection of 2% solution |
Drug: Mepivacaine
This is a shorter acting spinal anesthetic as compared to the current standard of care at this institution.
Other Names:
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| Active Comparator: Bupivacaine Spinal Anesthetic Bupivacaine 12 mg of 8.25% solution |
Drug: Bupivacaine
This is the current standard of care at this institution and many centers. This is a longer acting spinal anesthetic compared to the study drug.
Other Names:
|
Outcome Measures
Primary Outcome Measures
- Return of motor and sensory function [Exams will take place in 15 minute intervals beginning with arrival to the PACU and will be continued for a maximum of 6 hours or until the exam returns to baseline for 2 consecutive exams.]
Times will be recorded in minutes from the administration of the spinal anesthetic. Normal exam will include intact sensation to light touch of the thigh, calf, foot and toes. Normal motor is defined as ability to perform a straight leg raise, active knee flexion, as well as wiggling of the ankle and toes.
Secondary Outcome Measures
- Pain [Entire hospital admission. No data will be recorded after 96 hours.]
visual analog scale from 0 - 10
- Pain [Hospital admission, maximum of 96 hours.]
morphine equivalent consumption
- Time to urination [24 hours maximum from time of spinal.]
The total time between the administration of spinal anesthesia to the first episode of spontaneous urination will be recorded. Patients who require greater than 6 hours to urinate independently are followed per hospital protocol with serial bladder scans and straight catheterization for urinary retention as needed. Patients who exceed 6 hours to urinate will be defined as having urinary retention.
- Urinary retention [Entire hospital stay beginning immediately in the post operative period until discharge to a maximum of 96 hours.]
The number of straight catheterization and foley placements will be recorded as well.
- Length of stay [Hospital admission maximum of 96 hours.]
Length of stay
- Time to discharge readiness. [Hospital admission maximum of 96 hours.]
Time from admission to discharge readiness as assessed by physical therapy.
- Transient Neurologic Symptoms [Hospital admission and first follow up visit. Data will not be recorded after 3 weeks from time of spinal]
Any episodes of transient radiating pain in the buttocks and thigh will be recorded in the hospital charts during routine post operative rounds. This is also be discussed at the first follow up visit scheduled 2 weeks after surgery.
Eligibility Criteria
Criteria
Inclusion Criteria:
- Adult patients undergoing primary total knee arthroplasty
Exclusion Criteria:
-
Chronic opioid users
-
Unable to give informed consent
-
Forego the use of a foley catheter
-
Those with hypersensitively to amide local anesthetics or opioids
-
Those with contraindications to spinal anesthesia
-
Conversion to general anesthesia will be excluded.
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | Henry Ford West Bloomfield | West Bloomfield Township | Michigan | United States | 48322 |
Sponsors and Collaborators
- Henry Ford Health System
Investigators
- Principal Investigator: Jason Davis, MD, Surgeon
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- #10455