Multimodal Analgesia in Cardiac Surgery (Pilot Study)

Virginia Commonwealth University (VCU)

Status and phase: Terminated; Phase 4

Conditions: Heart Diseases

Treatments: Drug: Ketamine; Drug: Lidocaine; Drug: Duramorph; Drug: Precedex; Drug: Unrestricted Fentanyl

Study type: Interventional

Funder types: Other

Identifiers

NCT02734940

HM20004692

Details and patient eligibility

About

The investigators objective is to assess the effectiveness of an opioid sparing multimodal approach for enhancing the recovery in Cardiac Surgical patients. This model would use a combination of intravenous (Dexmedetomidine, Ketamine, Lidocaine) and Spinal (Morphine) drugs.

Full description

Cardiac surgery is associated with significant acute pain and a proportion of these patients will develop chronic pain.

Opioids are the main stay of analgesia in cardiac surgery because of the safer hemodynamic profile and sedation. However high dose narcotic use is associated with a variety of unwanted side effects prolonging postoperative recovery. There is growing evidence for the effectiveness of multimodal approach utilizing opiate sparing techniques for enhancing patient recovery following surgery. Early extubation has been associated with improved patient outcome and cost effectiveness in cardiac surgery. The investigators objective is to assess the effectiveness of an opioid sparing multimodal approach for enhancing the recovery in Cardiac Surgical patients. This model would use a combination of intravenous (Dexmedetomidine, Ketamine, Lidocaine) and Spinal (Morphine) drugs. All of the above anesthetic drugs have opioid sparing effect in surgical Patients.

Dexmedetomidine use has been associated with decreased cardiac arrhythmias and improved neurological outcome in cardiac surgical patients. Ketamine has been linked with attenuation of postoperative cognitive dysfunction after cardiac surgery. Both intravenous lidocaine and spinal morphine have been shown to reduce opioid consumption in the perioperative period.

Enrollment: 3 patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Elective CABGs and/or Valve replacements, ≥ 18 years old

Exclusion criteria

• Re-do cardiac surgery, Acute endocarditis, Circulatory arrest, Emergent cases, Shock, Left Ventricular Assist Device, Transplantation, Transcatheter Aortic Valve Replacement, contraindications for Spinal including coagulopathy and Clopidogrel <7days, psychosis, known allergy to any of the study drugs, Preoperative liver dysfunction (AST/ALT > 2 times normal) and Renal dysfunction (Cr > 2 mg/dL), inability to administer spinal anesthetic, preoperative opioid use, patients who are unable to give their own consent, expected prolonged intubation postoperatively (>12 hrs), prisoners, pregnancy

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Triple Blind

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3 participants in 2 patient groups

Unrestricted Fentanyl

Active Comparator group

Description:

Will receive injection of sterile saline (2cc) in lower back area (to minimize participant bias) and unrestricted amount of intraoperative opioids (fentanyl) at the discretion of the Anesthesiologist. Both groups will receive General Anesthesia with volatile agents and single dose of iv Tylenol intraoperatively. Both groups of patients will be transported to Intensive Care Unit (ICU) on Dexmedetomidine (dose range 0.25 - 0.7 mcg/kg/hr). Dose titration is based on sedation level and hemodynamic goals set by Cardiac Anesthesiologist.

Treatment:

Drug: Unrestricted Fentanyl

Lidocaine, Dexmedetomidine and Ketamine

Experimental group

Description:

Will receive pre-operative spinal duramorph (4mcg/kg up to max dose of 300mcg), intra-operative intravenous (iv) infusion of Ketamine (0.4 mg/kg/hr), Lidocaine (20 mcg/kg/min) and Dexmedetomidine (0.25 mcg/kg/hr) started after induction of General Anesthesia and maintained through the Cardiopulmonary Bypass (CPB) towards the end of surgery. At this point all infusions will be turned off except Dexmedetomidine. The total intraoperative fentanyl dose will be limited to \<250mcg (or 3mcg/kg) and total midazolam to ≤ 2mg in the study group.

Treatment:

Drug: Ketamine

Drug: Precedex

Drug: Duramorph

Drug: Lidocaine