Sacral canal block
Conditions
Interventions
Elderly male group(Group C-m):Different concentrations of ropivacaine (with a volume of 20ml each)
Elderly female group (Group C-f):Different concentrations of ropivacaine (with a volume of 20ml each)
Elderly male group(Group V-m):Fixed concentration but different volumes of ropivacaine
Elderly female group (Group V-f):Fixed concentration but different volumes of ropivacaine
Sponsors
Chongqing Traditional Chinese Medicine Hospital
Eligibility
Sex/Gender
All
Age
60 Years to 80 Years
Inclusion criteria
Inclusion criteria: 1. Old patients aged 60-80 years (including 60 and 80 years ); 2. Patients with elective surgery undergoing hemorrhoidectomy in the sacral block ; 3. ASA grade I-II.
Exclusion criteria
Exclusion criteria: 1. Hemorrhagic disease; 2. Infection at the sacral puncture site; 3. Central nervous system disease; 4. Peripheral arterial sclerosis; 5. History of diabetes; 6. History of oral anticoagulants such as contraceptives and aspirin with two weks; 7. History of anaesthetic allergy ; 8. History of spinal or perianal surgery; 9. BMI > 30 kg/m2.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| EC50 (effective concentrate 50);EV50 (effective volume 50); | — |
Countries
China
Contacts
Public ContactWang Fu
Chongqing Traditional Chinese Medicine Hospital
Outcome results
None listed