Cutaneous Sensory Block Area of the Subcostal Ultrasound-Guided Transversus Abdominis Plane Block

Patients planned for elective laparoscopic cholecystectomy received a peroperative ultrasound-guided subcostal transversus abdominis plane block (USTAP) at the beginning of the procedure. At T90 minutes after the end of anaesthesia the cutaneous sensory block area (CSBA) was measured using cold sensation and mapped with a sterile marker. The CSBA was photodocumented and the area calculated.

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Key information

Conditions

Postoperative Pain Neurologic Manifestations Pain Pain, Postoperative Pathologic Processes Pathological Conditions, Signs and Symptoms Postoperative Complications Signs and Symptoms

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Nordsjaellands Hospital

Hillerød, 3400, Denmark

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Planned for elective laparoscopic cholecystectomy, age 18 or older, written and verbal consent

Exclusion criteria

Non-compliant due to language or psychiatric disease, previous surgery to the upper abdomen, incisional hernia, pregnancy, sensory deficit of the abdomen or thorax.

Treatment and study plan

Ultrasound-guided subcostal transversus abdominis plane block (US-TAP)

Procedure

US-TAP is a peripheral nerve block applied for postoperative pain relief. Subcostal refers to the approach which can also be lateral or posterior. In this trial the subcostal approach was used.

Primary outcomes

Cutaneous Sensory Block Area

Time frame: 90 minutes postoperatively or 150 minutes after US-TAP application

The area of the dermis which is blocked to sensory stimulus such as pain, heat and cold.

Sponsors and collaborators

Lead sponsor

Nordsjaellands Hospital

Other

Registry information

Acronym: CUSBAT

Important dates

Study start: 2022
Primary completion: 2022
Study completion: 2022
First posted: Apr 24, 2023
Registry last updated: Aug 22, 2025

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This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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Completed