Analysis of Photoplethysmographic Signal in Lumbar Sympathetic Block

An Analysis of Photoplethysmographic Signal in Diagnostic Lumbar Sympathetic Block for Complex Regional Pain Syndrome

Status

UNKNOWN

Phases

Phase 3

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT01134289

Acronym

park001

Enrollment

Registered

2010-05-31

Start date

2009-09-30

Completion date

Unknown

Last updated

2010-06-07

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

Conditions

Complex Regional Pain Syndrome

Keywords

complex regional pain syndrome, lumbar sympathetic blockade, photoplethysmography, diagnostic lumbar sympathetic blockade

Brief summary

This study aims to compare the alternative current and the direct current signal changes of photoplethysmography between both feet during one side lumbar sympathetic block. The hypothesis is that signal changes occur earlier than other indices to decide whether it is successful following lumbar sympathetic block on only one-side.

Interventions

PROCEDURElumbar sympathetic block

unilateral lumbar sympathetic block at L3 level using 0.2% chirocaine under C-arm fluoroscopy

Study design

Allocation

NON_RANDOMIZED

Intervention model

SINGLE_GROUP

Primary purpose

DIAGNOSTIC

Masking

QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender

ALL

Age

19 Years to 70 Years

Healthy volunteers

Inclusion criteria

* Physically examined for complex regional pain syndrome on lower extremity, * Scheduled for diagnostic lumbar sympathetic blockade.

Exclusion criteria

* Graded as ASA 3 or higher, * Below 18 or above 70 years of age, or * Had any other contraindication for regional anesthesia.

Design outcomes

Primary

Measure	Time frame	Description
Index of sympathetic block	1 minute at intervals from baseline through end of procedure	change of slope of signals of the alternative current and the direct current from foot The baseline is defined as the point of surgical drap. The end of procedure is decided when the temperature of foot is increased more than 2 degrees from baseline within 20 minutes after local anesthetics injection

Secondary

Measure	Time frame	Description
skin temperature changes	1 minute at intervals during procedure	foot temperature change from baseline
electrocardiogram	1 minute at intervals from baseline through end of procedure	heart rate variability measurement

Countries

South Korea

Outcome results

None listed

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