The Effect of Spinal Flexion in the Lateral Decubitus Position on the Unilaterality During Spinal Anesthesia

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT01321684

Enrollment

Registered

2011-03-23

Start date

2011-03-31

Completion date

2011-10-31

Last updated

2012-05-30

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

Conditions

Spinal Anesthesia

Brief summary

For unilateral spinal block, spinal local anesthetics should take effect on the spinal nerves of one side. With full flexion of the spine, the cauda equina becomes tightened and hangs in the middle of the subarachnoid space. This study was performed to assess if flexion of the vertebral column facilitates unilateral spinal anesthesia.

Interventions

OTHERlateral decubitus position with full spinal flexion

The patients maintained the lateral decubitus position with the hips and back fully flexed for 15 minutes.

OTHERlateral decubitus position without spinal flexion

the patients are allowed to straighten their flexed hips and back to obtain the normal lordotic curvature of spinal column

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

SUPPORTIVE_CARE

Masking

SINGLE (Outcomes Assessor)

Eligibility

Sex/Gender

MALE

Age

20 Years to 45 Years

Healthy volunteers

Inclusion criteria

* ASA physical status Ⅰ-Ⅱ, scheduled for elective knee arthroscopy under spinal anesthesia

Exclusion criteria

* Hemodynamically unstable patients * Lumbar disease * patients with back pain

Design outcomes

Primary

Measure	Time frame
Time for the complete regression of pinprick spinal analgesia on the nondependent legs	Sensory and motor blockade were evaluated within 3 hour of intrathecal injection

Countries

South Korea

Outcome results

None listed

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