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TerminatedNCT01250418Updated Aug 28, 2014Results posted

SNAP VS BIS(OAA/S) Scale During a Sedation Regimen With and Without Ketamine

An interventional study of Ketamine group in Pain, sponsored by Northwestern University. Terminated at 1 site in United States. Open to female participants aged 18 Years to 64 Years. Per ClinicalTrials.gov, last updated 2014-08-28.

Sponsored by Northwestern University · Not applicable, Interventional, and Basic science

Why this study was terminated
Monitor manufacturer stopped marketing plan for the product.
Phase
Not applicable
Study type
Interventional
Enrollment
25
Allocation
Randomized
Ages
18 Years to 64 Years
Sex
Female
01

Study summary

The study question: Does the SNAP-Index (SI) correlates better with the OASS than the BIS Monitor during sedation with ketamine?

The study hypothesis: Since the SNAP II monitor seems to be more responsive during emergence of anesthesia, it will have a better correlation with the OASS than the BIS monitor with the use of ketamine.

02

Conditions studied

  • Pain

Keywords

  • Bispectral Index
  • Ketamine
03

In context

Lead sponsor

Northwestern University is the lead sponsor of 1,396 studies on the registry; 199 are open to participants now.

Of its 102 completed or terminated interventional studies of FDA-regulated products, 73 (72%) have results posted.

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

04

Who can participate

Ages eligible
18 Years to 64 Years
Sexes eligible
Female
Accepts healthy volunteers
No

Inclusion criteria

  • Age : 18-64 years
  • ASA : I-III
  • Procedure : Breast or gynecological surgery
  • Anesthesia :Monitored anesthesia care

Exclusion criteria

Exclusion Criteria:

  • Pregnancy
  • Breast Feeding
  • Body Mass Index >35kg/m2
  • Drug or Alcohol abuse
  • Use anticonvulsants
  • History of CVA
  • Drop-out criteria:

    • Patient or surgeon request
    • Conversion to general anesthesia
    • Inability to obtain data from both monitors
05

Study design

Phase
Not applicable
Primary purpose
Basic science
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Care provider, Investigator)
Enrollment
25 participants (actual)

Study arms

  • Active comparator
    Ketamine Group

    ketamine bolus of 0.25mg/kg followed by an infusion set at 1.5 mcg /kg/min.

    Drug: Ketamine group

  • No intervention
    No ketamine

    No ketamine added to anesthesia regimen

Interventions

  • DrugKetamine group

    ketamine bolus of 0.25mg/kg followed by an infusion set at 1.5 mcg /kg/min.

06

What researchers measure

Primary outcomes

  1. TcCO2 Above 50

    % Time Tosca Monitor (TcCO2) above 50. A TcCo2 above 50 is indicative of hypoventilation.

    Time frame: Intraoperative, an average of about 1 and 1/2 hours.

07

Results

Posted Aug 28, 2014

Participant flow

Participant flow — Overall Study
MilestoneKetamine GroupNo Ketamine
Started916
Completed815
Not completed11
Withdrew: Monitor data failure11

Outcome measures

PrimaryTcCO2 Above 50

% Time Tosca Monitor (TcCO2) above 50. A TcCo2 above 50 is indicative of hypoventilation.

Time frame:
Intraoperative, an average of about 1 and 1/2 hours.
Reported as:
Mean · Percent time intraoperatrive
TcCO2 Above 50
Percent time intraoperatriveKetamine GroupNo Ketamine
TcCO2 Above 5039 ± 26.5430.8 ± 26.14

Adverse events

Collected over 24 hours. Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
No Ketamine Added to Anesthesia Regimen—0/16 (0%)0/16 (0%)
Ketamine Group—0/9 (0%)0/9 (0%)

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)Ketamine GroupNo KetamineTotal
<=18 years000
Between 18 and 65 years91625
>=65 years000
Sex: Female, Male
Sex: Female, Male(Participants)Ketamine GroupNo KetamineTotal
Female91625
Male000
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Ketamine GroupNo KetamineTotal
American Indian or Alaska Native000
Asian011
Native Hawaiian or Other Pacific Islander000
Black or African American145
White81119
More than one race000
Unknown or Not Reported000
Region of Enrollment
Region of Enrollment(participants)Ketamine GroupNo KetamineTotal
United States91625
08

Study locations

1 site
  • Northwestern Memorial Hospital
    Chicago, Illinois 60611, United States
09

References and documents

Publications

  • Chernik DA, Gillings D, Laine H, Hendler J, Silver JM, Davidson AB, Schwam EM, Siegel JL. Validity and reliability of the Observer's Assessment of Alertness/Sedation Scale: study with intravenous midazolam. J Clin Psychopharmacol. 1990 Aug;10(4):244-51. PubMed 2286697 ↗
  • Sigl JC, Chamoun NG. An introduction to bispectral analysis for the electroencephalogram. J Clin Monit. 1994 Nov;10(6):392-404. doi: 10.1007/BF01618421. PubMed 7836975 ↗
  • Glass PS, Bloom M, Kearse L, Rosow C, Sebel P, Manberg P. Bispectral analysis measures sedation and memory effects of propofol, midazolam, isoflurane, and alfentanil in healthy volunteers. Anesthesiology. 1997 Apr;86(4):836-47. doi: 10.1097/00000542-199704000-00014. PubMed 9105228 ↗
  • Iselin-Chaves IA, Flaishon R, Sebel PS, Howell S, Gan TJ, Sigl J, Ginsberg B, Glass PS. The effect of the interaction of propofol and alfentanil on recall, loss of consciousness, and the Bispectral Index. Anesth Analg. 1998 Oct;87(4):949-55. doi: 10.1097/00000539-199810000-00038. PubMed 9768800 ↗
  • Song D, Joshi GP, White PF. Titration of volatile anesthetics using bispectral index facilitates recovery after ambulatory anesthesia. Anesthesiology. 1997 Oct;87(4):842-8. doi: 10.1097/00000542-199710000-00018. PubMed 9357886 ↗
  • Sebel PS, Lang E, Rampil IJ, White PF, Cork R, Jopling M, Smith NT, Glass PS, Manberg P. A multicenter study of bispectral electroencephalogram analysis for monitoring anesthetic effect. Anesth Analg. 1997 Apr;84(4):891-9. doi: 10.1097/00000539-199704000-00035. PubMed 9085977 ↗
  • Dressler O, Schneider G, Stockmanns G, Kochs EF. Awareness and the EEG power spectrum: analysis of frequencies. Br J Anaesth. 2004 Dec;93(6):806-9. doi: 10.1093/bja/aeh270. Epub 2004 Sep 17. PubMed 15377585 ↗
  • Wong CA, Fragen RJ, Fitzgerald P, McCarthy RJ. A comparison of the SNAP II and BIS XP indices during sevoflurane and nitrous oxide anaesthesia at 1 and 1.5 MAC and at awakening. Br J Anaesth. 2006 Aug;97(2):181-6. doi: 10.1093/bja/ael131. Epub 2006 May 23. PubMed 16720676 ↗
10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 28, 2014, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT01250418
Lead sponsor
Northwestern University
Responsible party
Gildasio De Oliveira (Gildasio De Oliveira, M.D. Principal Investigator, Northwestern University) — Principal investigator
First posted
Nov 30, 2010
Start date
Aug 2010
Primary completion
May 2012
Completion
May 2012
Results posted
Aug 28, 2014
Last update
Aug 28, 2014

Study contacts

Gildasio DeOliveira, MD
principal investigator · Northwestern University

Oversight

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

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