Overview
Radical prostatectomy is performed via three approaches — open retropubic, laparoscopic, and robot-assisted (RARP) — with RARP now the dominant technique in most high-volume centres. While robotic/laparoscopic approaches are generally less painful than open surgery, postoperative pain still arises from port-site incisions, prostate/pelvic tissue dissection, bladder catheter irritation, and (less commonly today) bladder spasm. Even after RARP, morphine consumption can be comparable to open surgery in some series — the minimally invasive approach reduces but does not eliminate the need for effective analgesia.
PROSPECT 2021 summary (update of the original 2015 guideline, reflecting the shift toward robotic surgery): Basic analgesia — paracetamol + NSAID/COX-2 inhibitor — for all approaches. TAP block recommended as first-choice regional technique for laparoscopic/robotic prostatectomy. IV lidocaine infusion should be considered for open surgery. This approach-specific recommendation split is a defining feature of this guideline.
Open vs Robotic/Laparoscopic — Why Recommendations Differ
PROSPECT 2021 explicitly splits its regional/adjunct recommendation by surgical approach, reflecting genuinely different evidence findings for each:
| Open Retropubic | Laparoscopic / Robot-Assisted (RARP) | |
|---|---|---|
| Pain profile | Higher — larger incision, more tissue trauma | Lower overall, but still clinically significant (port-site, dissection, catheter) |
| First-choice regional/adjunct | IV lidocaine infusion | TAP block |
| TAP block evidence | Conflicting results | Reduced pain scores — recommended |
| Local wound infiltration | Positive results — reasonable adjunct | Less specifically studied — port-site infiltration as alternative |
Robotic / Laparoscopic Prostatectomy
- Paracetamol 1g PO
- NSAID/COX-2 PO
- Bilateral TAP block — typically performed laparoscopically at end of procedure, or US-guided
- Dexamethasone 8 mg IV
- Paracetamol 1g IV (if not given pre-op)
- Port-site infiltration — alternative/adjunct
- Paracetamol 1g QDS regular
- NSAID/COX-2 regular ≤5 days
- Opioid PRN rescue — typically minimal requirement
- Early mobilisation, early catheter care education
Open Retropubic Prostatectomy
- Paracetamol 1g PO
- NSAID/COX-2 PO
- IV lidocaine: loading 1–1.5 mg/kg, infusion 1–2 mg/kg/h
- Local wound infiltration by surgeon — positive evidence for open approach specifically
- Dexamethasone 8 mg IV
- Paracetamol 1g IV (if not given pre-op)
- Continue IV lidocaine up to 24h if started
- Paracetamol 1g QDS regular
- NSAID/COX-2 regular ≤5 days
- Opioid PCA/PRN rescue
TAP Block — RARP/Laparoscopic First-Choice
Bilateral TAP block, typically performed at the end of surgery under laparoscopic vision (or ultrasound-guided), lowered pain scores in robot-assisted procedures. See the full TAP block page for complete technique. Lateral or subcostal approach depending on port placement; bilateral for the typical multi-port RARP layout.
Dosing
| Agent | Concentration | Volume (per side) | Notes |
|---|---|---|---|
| Ropivacaine | 0.375% | 15–20 mL | ± clonidine as adjuvant studied in comparative trials |
| Bupivacaine | 0.25% | 20 mL | Alternative agent |
Laparoscopic-guided TAP (performed by the surgical team under direct vision via existing ports) is a practical option specific to robotic/laparoscopic prostatectomy — avoiding a separate percutaneous procedure while achieving comparable block placement.
IV Lidocaine — Open Surgery First-Choice
Continuous IV lidocaine infusion reduced postoperative pain scores specifically in open prostatectomy in the reviewed studies. See the full Systemic Analgesia: IV Lidocaine section for complete dosing, monitoring requirements, and safety considerations (cardiac monitoring, Intralipid availability).
Standard regimen: loading dose 1–1.5 mg/kg IV over 10 minutes, then infusion 1–2 mg/kg/h intraoperatively, continuing up to 24h postoperatively where used.
Catheter Irritation & Bladder Spasm
Urethral/suprapubic catheter irritation and bladder spasm contribute to discomfort distinct from incisional pain, particularly in the first 24–48h. While not a primary PROSPECT-graded recommendation, several adjunctive approaches are commonly used in practice:
- Antimuscarinic agents (e.g. oxybutynin) — for catheter-related bladder spasm, used pragmatically though not a core PROSPECT recommendation
- Intravesical local anaesthetic instillation (e.g. ropivacaine) — studied as a novel adjunct in RARP with some positive signal, though not yet a standard recommendation
- Catheter care education — clear discharge advice on catheter management reduces anxiety-related discomfort and supports earlier comfortable mobilisation
Practical Analgesic Protocol
Suggested protocol for robot-assisted radical prostatectomy (RARP):
References
- PROSPECT Working Group. PROSPECT guidelines update for evidence-based pain management after prostatectomy for cancer. J Clin Anesth. 2021. PMID 34197976 ↗
- ESRA. PROSPECT guidelines for postoperative pain management after radical prostatectomy. esraeurope.org ↗
- Impact of analgesic techniques on early quality of recovery after prostatectomy: A 3-arm, randomized trial. PMC. PMC9541353 ↗
- Elkassabany N, Ahmed M, Malkowicz SB, et al. Comparison between the analgesic efficacy of TAP block and placebo in open retropubic radical prostatectomy. J Clin Anesth. 2013;25:459–465.
- Webster TM, Herrell SD, Chang SS, et al. Robotic assisted laparoscopic radical prostatectomy versus retropubic radical prostatectomy: a prospective assessment of postoperative pain. J Urol. 2005;174:912–914.