Comparison of Two Techniques of Quadratus Lumborum Block

Chinese Academy of Medical Sciences & Peking Union Medical College

Status: Unknown

Conditions: Nerve Block

Treatments: Procedure: transverse scan, in-plane, posterior- anterior quadratus lumborum block; Procedure: paramedian sagittal longitudinal scan, in-plane, caudal-cranial quadratus lumborum block

Study type: Interventional

Funder types: Other

Identifiers

NCT05001802

20210505

Details and patient eligibility

About

Our objective is to investigate the extent of cranial dermatomal spread of transmuscular quadratus lumborum block(TMQLB )when equal dosage(ml/kg) of local anesthetic are injected with the transverse versus an modified paramedian sagittal approach for patients undergoing laparoscopic adrenalectomy.

Full description

The paramedian sagittal oblique transmuscular quadratus lumborum block(TMQLB )approach has been introduced to facilitate cranial spread by injecting the local in a caudal to cranial direction compared with the transverse approach. Currently, there are no data comparing the two techniques mentioned above with regards to extent of spread level. Our objective is to investigate the extent of cranial dermatomal spread of TMQLB when equal dosage(ml/kg) of local anesthetic are injected with the transverse versus an modified paramedian sagittal approach for patients undergoing laparoscopic adrenalectomy. In addition, the investigators wish to compare the performance time, caudal dermatomal spread of TMQLB and postoperative analgesia effect.

Enrollment: 50 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• ≥Age 18yrs

  • American Society of Anesthesiologists physical status I-II
  • Undergo laparoscopic adrenalectomy
  • Informed consent
  • Able to cooperate with study process

Exclusion criteria

• Allergy to local anesthetic and other medications used in the study
• Patient refusal or lack of informed consent
• Coexisting hematological disorder or with deranged coagulation parameters
• Pre-existing major organ dysfunction such as hepatic and renal failure
• History of previous renal surgery.

Trial design

Primary purpose: Other

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Triple Blind

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50 participants in 2 patient groups

transverse quadratus lumborum block

Active Comparator group

Description:

The patients will receive the transmuscular quadratus lumborum block before surgery using the transverse scan, in-plain, posterior to anterior approach. 0.6ml/kg 0.375% ropivacaine is injected when the correct needle location is confirmed.

Treatment:

Procedure: transverse scan, in-plane, posterior- anterior quadratus lumborum block

longitudinal quadratus lumborum block

Experimental group

Description:

The patients will receive the transmuscular quadratus lumborum block before surgery using the paramedic sagittal longitudinal scan, in-plain, caudal-cephalic approach.0.6ml/kg 0.375% ropivacaine is injected when the correct needle location is confirmed.

Treatment:

Procedure: paramedian sagittal longitudinal scan, in-plane, caudal-cranial quadratus lumborum block