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This study evaluates the effect of the single-injection adductor canal block in patients receiving total knee arthroplasty under spinal anesthesia.
This study aims to evaluate the effect of the single-injection adductor canal block in patients receiving total knee arthroplasty under spinal anesthesia. The effect of the single-injection adductor canal and continuous adductor canal block in patients receiving total knee arthroplasty under general anesthesia has been well established. However, due to the residual effect of spinal anesthesia, the effect of the single-injection adductor canal block needs to be determined. The investigators hypothesize that the single-injection adductor canal block will decrease the total sum of 2h, 6h, 12h, and 24h pain score.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| control group | Sham Comparator | normal saline injection |
|
| test group | Experimental | 0.5% ropivacaine injection |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| adductor canal block | Procedure | After the end of the surgery, at the arrival of PACU, the patient's leg is prepared and draped in a sterile manner. Assisted by the high-frequency linear ultrasound transducer, we target the mid-thigh level and the 22-gauge/8cm needle is introduced in plain through the sartorius muscle. the correct position for the tip of the needle in the adductor canal is checked and a bolus injection of 0.5% ropivacaine 15ml is given. |
| Measure | Description | Time Frame |
|---|---|---|
| the sum of pain score | VAS pain score (0 to 10) is measured using numeric pain rating scale at 2 hours, 6 hours, 12 hours, and 24 hours 0: no pain, 10: worst pain | 2 hours, 6 hours, 12 hours, and 24 hours after intervention |
| Measure | Description | Time Frame |
|---|---|---|
| Postoperative nausea and vomiting | degree of postoperative nausea and vomiting (0 to 3) 0: no nausea, no vomiting, 1: nausea present, but no vomiting, 2: nausea present, vomiting once, 3: vomiting repeatedly within 30 minutes. | 2 hours, 6 hours, 12 hours, and 24 hours after intervention |
| Postoperative opioid consumption |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Seoul National University Hospital | Seoul | 110-744 | South Korea |
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| ID | Term |
|---|---|
| D035061 | Control Groups |
| ID | Term |
|---|---|
| D015340 | Epidemiologic Research Design |
| D004812 | Epidemiologic Methods |
| D008919 | Investigative Techniques |
| D012107 | Research Design |
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|
| control group | Procedure | After the end of the surgery, at the arrival of PACU, the patient's leg is prepared and draped in a sterile manner. Assisted by the high-frequency linear ultrasound transducer, we target the mid-thigh level and the 22-gauge/8cm needle is introduced in plain through the sartorius muscle. the correct position for the tip of the needle in the adductor canal is checked and a bolus injection of normal saline15ml is given. |
|
amount of postoperative opioid consumption based on oral morphine equivalent daily dose |
| 2 hours, 6 hours, 12 hours, and 24 hours intervention |
| D008722 | Methods |