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Effect of Rectus Block Timing on Opioid Use

The Effect of Timing of Rectus Sheath Blockade During Robotic Prostate Surgery on Opioid Consumption: A Randomized Double-Blind Study

Status
Completed
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07433140
Acronym
PROSTIMERSBOP
Enrollment
50
Registered
2026-02-25
Start date
2026-03-15
Completion date
2026-05-15
Last updated
2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Nociception Level Index(NoL), Nociception Monitoring, Opioid Consumption, Pain Management, Prostate Cancer

Keywords

Robot Surgery, Rectus sheath block, Nociception, opioid, Cancer of Prostate

Brief summary

The aim of this study is to observe the effect of administering local anesthetic to the abdominal wall at the beginning or end of surgery under general anesthesia on opioid consumption during surgery. The hypothesis of this study is to demonstrate that administering a rectus sheath block before the surgical procedure under general anesthesia is effective in reducing intraoperative opioid consumption and opioid-related side effects compared to administering it after the surgery is completed.

Interventions

PROCEDUREEarly bilateral rectus sheat block

Bilateral rectus sheat block will be performed after the anesthesia induction, before the start of the surgery

PROCEDURELate bilateral rectus sheat block

Bilateral rectus sheat block will be performed after the completion of the surgery, before the end of general anesthesia

Sponsors

Koc University Hospital
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
TRIPLE (Subject, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
MALE
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

-ASA (American Society of Anesthesiologists) I-III adult patients with prostate cancer and benign prostate diseases scheduled for robotic surgery at Koç University Hospital.

Exclusion criteria

* \<18 years of age * ASA (American Society of Anesthesiologists) IV, V patients * Non-elective emergency cases * Previous major abdominal/pelvic surgery * History of significant psychiatric disorders * Patients who may have contraindications to nerve blocks (bleeding diathesis, infection, and local anesthetic allergy).

Design outcomes

Primary

MeasureTime frameDescription
Total intraoperatif remifentanil consumptionTotal operative duration
Average intraoperative remifentanil consumptionTotal operative durationTotal intraoperative remifentail consumption divided by the weight of the patient (kg) and total operative duration (minutes). (mcg/kg/dk)

Secondary

MeasureTime frameDescription
Cumulative opioid consumption at postoperative 1st hourFrom the end of the surgery to the end of the first postoperative hourCumulative opioid consumption at postoperative 1st hour in IV morphine equivalent
Cumulative opioid consumption at postoperative 6th hourFrom the end of the surgery to the end of the 6th postoperative hourCumulative opioid consumption at postoperative 6th hour in IV morphine equivalent
Cumulative opioid consumption at postoperative 12th hourFrom the end of the surgery to the end of the 12th postoperative hourCumulative opioid consumption at postoperative 12th hour in IV morphine equivalent
Cumulative opioid consumption at postoperative 24th hourFrom the end of the surgery to the end of the 24th postoperative hourCumulative opioid consumption at postoperative 24th hour in IV morphine equivalent
Pain at postoperative first hourAt the end of the postoperative 1st hourPain measured by Numeric Rating Scale (0-10)
Pain at postoperative 6th hourAt the end of the postoperative 6th hourPain measured by Numeric Rating Scale (0-10)
Pain at postoperative 12th hourAt the end of the postoperative 12th hourPain measured by Numeric Rating Scale (0-10)
Pain at postoperative f24th hourAt the end of the postoperative 24th hourPain measured by Numeric Rating Scale (0-10)
Rescue analgesiaFrom the end of the surgery to the end of the first postoperative hourTotal rescue fentanyl administered (mcg)
Patient satisfactionAt the end of the 24th postoperative hourPatient satisfaction reported by the patient in a scale from 1 to 5

Countries

Turkey (Türkiye)

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Aug 4, 2026