Cardiovascular Safety After Continuous Ketamine Infusion


Observational study that evaluate the cardiovascular and neuropsychiatric side effects of ketamine analgesic infusions for acute pain

Full Title of Study: “Cardiovascular and Neuropsychiatric Side Effects in Ketamine Analgesic Infusions in Acute Pain”

Study Type

  • Study Type: Observational
  • Study Design
    • Time Perspective: Retrospective
  • Study Primary Completion Date: November 1, 2018

Detailed Description

Severe acute pain and opioid tolerance is an important symptom in patients after surgery.

Ketamine in analgesic infusion has been described to decrease acute pain, in patients with opioid tolerance. Ketamine use has been associated with side effects, which are doses dependant. Those side effects are mainly cardiovascular: Hypertension, tachycardia, and neuropsychiatric: delirium, hallucinations,nightmares that potentially compromise recovery of patients.


To determine retrospectively in data bases the frequency of tachycardia, hypertension, delirium, hallucinations and nightmares, in adult patients that received ketamine infusions before and after administration of this drug in the first 48 hours to treat acute and postoperative pain


  • Drug: Ketamine
    • Drug: Ketamine Side effects associated with ketamine infusion to treat acute pain, were reviewed after 48 hours of exposure and frequency of tachycardia, hypertension, hallucinations, delirium and nightmares were registrated for comparison

Arms, Groups and Cohorts

  • Ketamine infusion
    • Ketamine infusion treatment for acute pain in adult population in all type of surgery that received adjuvant analgesia with ketamine 0.1mg/kg/h during 48 hours.

Clinical Trial Outcome Measures

Primary Measures

  • Tachycardia
    • Time Frame: 2 days
    • Presence of absence of tachycardia (100 or above beats for minute) as physiological parameter recorded with cardioscope in the first 48 hours in clinical chart database after the infusion of ketamine has started.
  • Hypertension
    • Time Frame: 2 days
    • Presence or absence of hypertension (140/90 mm Hg or above ) as physiological parameter recorded with electronic arm manometer in the first 48 hours in clinical chart database after the infusion of ketamine has started.

Secondary Measures

  • Delirium
    • Time Frame: 2 days
    • Presence of absence of delirium reported in clinical records electronic database by nurse or physician in the first 48 hours after the infusion of ketamine has started.
  • Hallucinations
    • Time Frame: 2 days
    • Presence of absence hallucinations reported in clinical electronic database records by nurse or physician in the first 48 hours after the infusion of ketamine has started.
  • Nightmares
    • Time Frame: 2 days
    • Presence of absence of nightmares reported in clinical electronic database records by nurse or physician, in the first 48 hours after the infusion of ketamine has started.

Participating in This Clinical Trial

Inclusion Criteria

  • Patients older than 18 years old
  • Acute and Postoperative pain
  • Ketamine infusion at 0.15 mg/kg/h or below

Exclusion Criteria

  • Cognitive disfunction psychiatric illness
  • Acute cardiovascular disease
  • Anemia with Hb less than 7 g/dl
  • Decompensated hyperthyroidism
  • Low cardiac output
  • Incomplete medical history

Gender Eligibility: All

Minimum Age: 18 Years

Maximum Age: N/A

Are Healthy Volunteers Accepted: No

Investigator Details

  • Lead Sponsor
    • Universidad de Antioquia
  • Provider of Information About this Clinical Study
    • Sponsor
  • Overall Official(s)
    • Adriana M Cadavid, MD, Principal Investigator, Anesthesiology Investigator


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