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CompletedNCT01472835Updated Dec 15, 2016Results posted

Effect of Sedation on Diagnostic Injections

An interventional study of Midazolam and Fentanyl in Sacroiliac Joint Pain and Sympathetically Maintained Pain, sponsored by Johns Hopkins University. Completed at 1 site in United States. Open to participants aged 18 Years to 75 Years. Per ClinicalTrials.gov, last updated 2016-12-15.

Sponsored by Johns Hopkins University · Not applicable, Interventional, and Diagnostic

Phase
Not applicable
Study type
Interventional
Enrollment
73
Allocation
Randomized
Ages
18 Years to 75 Years
Sex
All
01

Study summary

Interventional pain procedures have diagnostic, prognostic and therapeutic value. It is well-documented that the reference standard for identifying a pain generator is a low-volume block performed with local anesthetic, with or without steroid. Many factors may increase the false positive (FP) rate of diagnostic and prognostic nerve blocks; however, the use of sedation is the most controversial and remediable. Proponents of sedation argue that it has little effect on the rate of positive diagnostic blocks, and may even reduce the false-negative rate. The purpose of this study is to determine the effect of intravenous sedation on pain relief and the "false-positive rate" after diagnostic nerve blocks.

Read the detailed description

Sixty-eight patients with sacroiliac (SI) joint or sympathetically-maintained pain will be randomized in a crossover fashion to receive diagnostic nerve blocks either with or without intravenous sedation. Among those who obtain some benefit and return for a 2nd block, this 2nd procedure will be done with sedation if the first was done without sedation, and vice versa. Midazolam and fentanyl will be used for intravenous sedation, titrated to anxiolysis and analgesia. Pain scores (0-10 numerical rating scale, or NRS) and an activity log will be recorded over the 8-hours following the blocks via a pain diary. The first follow-up visit will be 4 weeks after the procedure. Patients who obtain some benefit but continue to report significant pain or who might otherwise benefit from a repeat procedure will have this second procedure performed with sedation if no sedation was given for the first procedure, and without sedation if sedation was administered for the first procedure. The post-procedure pain data will be recorded in the same fashion as the initial nerve block. The second follow-up visit will be 4 weeks after the 2nd block.

02

Conditions studied

  • Sacroiliac Joint Pain
  • Sympathetically Maintained Pain

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Keywords

  • sedation
  • sensitivity
  • specificity
  • validity
  • diagnostic injection
03

In context

Arthralgia

273 studies on the registry are indexed under Arthralgia; 41 are open to participants now.

This study's enrollment of 73 is above the median of 63 across 219 interventional studies indexed under Arthralgia.

Browse Arthralgia studies →

Lead sponsor

Johns Hopkins University is the lead sponsor of 1,783 studies on the registry; 313 are open to participants now.

Of its 203 completed or terminated interventional studies of FDA-regulated products, 140 (69%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 75 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Chronic pain > 4 weeks but \< 10 years in duration
  • Suspected SI joint or sympathetically-maintained pain based on history and physical exam
  • May benefit from a sacroiliac joint or sympathetic block
  • Pain on 0-10 NRS scale > 3/10 in intensity

Exclusion criteria

Exclusion Criteria:

  • No previous interventional pain-alleviating injections for the same condition within the past 3 years
  • Uncontrolled coagulopathy
  • Pregnancy, which will be ruled out by a urine pregnancy test in women of childbearing age
  • Allergy to contrast dye or amide local anesthetics
  • Unstable medical or psychiatric condition (e.g. unstable angina, congestive heart failure or severe depression) that could preclude an optimal treatment response
  • Systemic infection
  • Age \< 18 or > 75 years
05

Study design

Phase
Not applicable
Primary purpose
Diagnostic
Allocation
Randomized
Intervention model
Crossover assignment
Masking
None (open label)
Enrollment
73 participants (actual)

Study arms

  • Experimental
    Sedation

    Pt will receive sedation with their procedure

    Drug: Midazolam · Drug: Fentanyl

  • No intervention
    Control

    Patient will not receive sedation during procedure

Interventions

  • DrugMidazolam

    Used for anxiolysis

  • DrugFentanyl

    Used for analgesia and as a sedative

06

What researchers measure

Primary outcomes

  1. Pain Score

    pain diary using 0-10 scale, with 0 being no pain and 10 being the worst pain imaginable

    Time frame: through 6 hours after injection

Secondary outcomes

  1. Pain Score

    0-10 numerical rating scale (NRS) pain scale. 0 being no pain and 10 being the worst possible pain.

    Time frame: 1-month

  2. Procedure-related Pain Score

    0-10 pain scale, with 0 being no pain and 10 being the worst pain imaginable

    Time frame: 1 day

  3. Oswestry Disability Index

    Measure of functional capacity on a scale ranging from 0% to 100%, with 0% signifying no disability

    Time frame: 1-month

  4. Satisfaction

    5-point Likert scale. The scale is from 1-5. 1 being very unsatisfied and 5 being very satisfied.

    Time frame: 1 day

07

Results

Posted Jun 16, 2014

Participant flow

Participant flow — Overall Study
MilestoneSedationControl
Started3736
Completed3536
Not completed20
Withdrew: Lost to follow-up20

Outcome measures

PrimaryPain Score

pain diary using 0-10 scale, with 0 being no pain and 10 being the worst pain imaginable

Time frame:
through 6 hours after injection
Reported as:
Mean · units on a scale
Pain Score
units on a scaleSedationControl
Pain Score2.2 ± 2.33.4 ± 2.8
SecondaryPain Score

0-10 numerical rating scale (NRS) pain scale. 0 being no pain and 10 being the worst possible pain.

Time frame:
1-month
Reported as:
Mean · units on a scale
Pain Score
units on a scaleSedationControl
Pain Score5.1 ± 2.95.6 ± 2.8
SecondaryProcedure-related Pain Score

0-10 pain scale, with 0 being no pain and 10 being the worst pain imaginable

Time frame:
1 day
Reported as:
Mean · units on a scale
Procedure-related Pain Score
units on a scaleSedationControl
Procedure-related Pain Score3.1 ± 2.85.5 ± 2.7
SecondaryOswestry Disability Index

Measure of functional capacity on a scale ranging from 0% to 100%, with 0% signifying no disability

Time frame:
1-month
Reported as:
Mean · units on a scale
Oswestry Disability Index
units on a scaleSedationControl
Oswestry Disability Index34.8 ± 14.640.6 ± 17.9
SecondarySatisfaction

5-point Likert scale. The scale is from 1-5. 1 being very unsatisfied and 5 being very satisfied.

Time frame:
1 day
Reported as:
Mean · units on a scale
Satisfaction
units on a scaleSedationControl
Satisfaction4.0 ± 1.13.6 ± 1.4

Adverse events

Collected over 1 month. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Sedation—0/37 (0%)3/37 (8.1%)
Control—0/36 (0%)6/36 (16.7%)
Most frequent other events
Most frequent other events
EventSedationControl
Worse painMusculoskeletal and connective tissue disorders0/372/36
NauseaGastrointestinal disorders1/371/36
HeadacheNervous system disorders1/371/36
WeaknessNervous system disorders0/371/36
DizzinessGeneral disorders0/371/36
dysphagiaGastrointestinal disorders1/370/36

Baseline characteristics

Age, Continuous
Age, Continuous(years)SedationControlTotal
Mean49.7 ± 16.150.3 ± 13.850.0 ± 15.0
Age, Categorical
Age, Categorical(Participants)SedationControlTotal
<=18 years000
Between 18 and 65 years323567
>=65 years516
Gender
Gender(Participants)SedationControlTotal
Female202242
Male171431
Region of Enrollment
Region of Enrollment(participants)SedationControlTotal
United States373673
08

Study locations

1 site
  • Johns Hopkins Blaustein Pain Treatment Center
    Baltimore, Maryland 21205, United States
09

References and documents

Publications

  • Cohen SP, Hurley RW. The ability of diagnostic spinal injections to predict surgical outcomes. Anesth Analg. 2007 Dec;105(6):1756-75, table of contents. doi: 10.1213/01.ane.0000287637.30163.a2. PubMed 18042881 ↗
  • Cohen SP, Hameed H, Kurihara C, Pasquina PF, Patel AM, Babade M, Griffith SR, Erdek ME, Jamison DE, Hurley RW. The effect of sedation on the accuracy and treatment outcomes for diagnostic injections: a randomized, controlled, crossover study. Pain Med. 2014 Apr;15(4):588-602. doi: 10.1111/pme.12389. Epub 2014 Feb 13. PubMed 24524866 ↗
10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 15, 2016, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT01472835
Lead sponsor
Johns Hopkins University
Collaborators
Walter Reed National Military Medical Center
Responsible party
Steven P. Cohen (Professor, Johns Hopkins University) — Principal investigator
First posted
Nov 17, 2011
Start date
Mar 2011
Primary completion
Feb 2013
Completion
Feb 2013
Results posted
Jun 16, 2014
Last update
Dec 15, 2016

Study contacts

Steven P Cohen, MD
principal investigator · Johns Hopkins University

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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