Pain
Conditions
Brief summary
To study whether the combination of ultrasound guidance and stimulating catheter could reduce the time for needle and catheter insertion compared with using stimulating catheter alone. Secondary outcomes: analgesic effects after the surgery.
Interventions
DEVICENUUS
Sonosite Micro Maxx
Sponsors
Peking University Third Hospital
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
30 Years to 90 Years
Healthy volunteers
No
Inclusion criteria
* Elective primary total knee replacement surgery under neuraxial anesthesia ASA\<=4 * Able to give informed consent * Able to cooperate with sensory and motor testing of lower limb function
Exclusion criteria
* coagulopathy * Allergy to local anaesthetic or postanalgesic rescue regimen * Signs, symptoms or laboratory evidence of local infection or systemic sepsis * No pre-existing neurological deficit (sensory or motor) affecting lower limb * Patients with lower limb amputations
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| time and number of attempts to perform block, the efficacy of the block | during the block procedure |
Secondary
| Measure | Time frame |
|---|---|
| postoperative analgesic effect | pod 1-3 |
Countries
China
Contacts
Primary ContactMin Li, MD
Backup ContactXuedong Wang, MS
Outcome results
None listed