| Surgical Procedure | Block Height | Suggested Technique | Comments |
|---|---|---|---|
| Perianal | L1–L2 | Hyperbaric solution or sitting position | Patients must remain in relative head-up or head-down position when using hypobaric and hyperbaric solutions to maintain restricted spread during the procedure |
| Perirectal | Hypobaric solution or jackknife position Isobaric solution or horizontal position | ||
| Lower extremity | T10 | Isobaric solution | Hypobaric and hyperbaric solutions are also suitable but may produce higher blocks than necessary |
| Hip | |||
| Transurethral resection of the prostate | |||
| Vaginal or cervical | |||
| Herniorrhaphy | T6–T8 | Hyperbaric solution or horizontal position | Isobaric solutions injected at the L2–L3 interspace may also be suitable |
| Pelvic Procedures | |||
| Appendectomy | Hyperbaric solution or horizontal position | Upper abdominal procedures usually require concomitant general anesthesia to prevent vagal reflexes and pain from traction on the diaphragm and esophagus | |
| Abdominal | T4–T6 | ||