The Influence of a Bupivacaine Digital Nerve Block Using Rev G.

The Influence of a Bupivacaine Digital Nerve Block With the New Continuous Sensor (Rev G) on the Accuracy of SpHb Monitoring.

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT01750554

Enrollment

Registered

2012-12-17

Start date

2012-12-31

Completion date

2013-07-31

Last updated

2015-04-10

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

Conditions

Patients Undergoing Spine Surgery

Keywords

SpHb; hemoglobin monitoring;bupivacaine digital nerve block

Brief summary

The investigators are proposing to continue investigation to improve the accuracy of the SpHb (continuous hemoglobin monitoring device) by administering an intermediate acting digital nerve block in the finger connected to the SpHb, specifically bupivacaine 0.25% in patients undergoing spine surgery. Bupivacaine is FDA approved and in routine use.

Detailed description

Patients undergoing spine surgery will be randomized to receive (or not) the bupivacaine digital block on the finger attached to the new limited release version of the hemoglobin sensor, RevG. The SpHb reading will be compared to a blood hemoglobin level analyzed in the UCSF Clinical Laboratories.

Interventions

OTHERintermediate-acting digital nerve block

non-therapeutic Bupivacaine digital nerve block to assess effect on accuracy of diagnostic readings

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

DIAGNOSTIC

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

18 Years to 85 Years

Healthy volunteers

Inclusion criteria

* Male or female 18 years of age or older * American Society of Anesthesiologists classification 1, 2 or 3 * Scheduled to undergo spine or hip surgery

Exclusion criteria

* Pregnant or nursing * Patients who in the study investigators clinical judgement would not be suitable

Design outcomes

Primary

Measure	Time frame	Description
SpHb (continuous hemoglobin monitor reading) minus tHb (clinical laboratory determined hemoglobin value).	Intermittent (about hourly) hemoglobin checks throughout the surgery.	Use of a longer acting local anesthetic (bupivacaine) for the digital nerve block will result in SpHb (the non-invasive hemoglobin device) being sufficiently accurate for blood transfusion decisions(≤ 1.0 g/dL difference) To assess if using an intermediate-acting digital nerve block will improve the accuracy of the SpHb readings when compared to a blood hemoglobin level analyzed in the UCSF Clinical Laboratories intermittently during the patient's surgery.

Countries

United States

Outcome results

None listed

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