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Efficacy and Safety of Sevofran in Patients Scheduled for Elective Surgery Under General Anesthesia

A

Asan Medical Center

Status and phase

Completed
Phase 4

Conditions

Generic Drugs
General Anesthesia
Sevoflurane

Treatments

Drug: generic sevoflurane
Drug: original sevoflurane

Study type

Interventional

Funder types

Other

Identifiers

NCT01096212
Asan Medical Center_sevofran_1

Details and patient eligibility

About

Sevoflurane is currently being used in more than 100 countries worldwide with an estimated 100 million operations having been performed using sevoflurane as a general anesthetic. After the expiry of the patent on sevoflurane as a pharmaceutical drug, a generic product (Sevofran®; Hana pharmacy, Co. Ltd, Seoul, Korea) has been launched. The aims of this study were to investigate the efficacy (mean minimum alveolar concentration), recovery characteristics (time to recovery of consciousness (ROC) and recovery, and BIS values at ROC and orientation), and safety (incidence and severity of adverse events) of generic sevoflurane in patients undergoing elective surgery.

Full description

Patients were randomly allocated to experimental group (generic sevoflurane) and active comparator group (original sevoflurane). Once in the operating room, patients were monitored with electrocardiography, non invasive blood pressure, pulse oximetry (Datex-Ohmeda S/5, Planar Systems, Inc., Beaverton, OR, USA) and BIS (Aspect 2000, Aspect Medical Systems, Inc., Newton, MA, USA).

Anesthesia was induced with fentanyl (2 μg/kg) and propofol (2mg/kg). When patients were unconscious, original or generic sevoflurane was administered. Tracheal intubation was facilitated by administering rocuronium 0.6 mg/kg. The lungs of the patients were then ventilated with oxygen in air (1:2), and the ventilation rate was adjusted to maintain the end-tidal carbon dioxide partial pressure between 35 and 45 mmHg. The concentrations of carbon dioxide, sevoflurane, and oxygen were measured continuously using an infrared anesthetic gas analyzer (Datex-Ohmeda S/5, Planar Systems, Inc., Beaverton, OR, USA), which was calibrated before anesthesia for each patient using a standard gas mixture.

The inspired concentration of sevoflurane was adjusted to maintain BIS values < 60 and stable haemodynamics (systolic arterial pressure (SAP) > 80 mmHg and heart rate (HR) > 45 beats/min). Also, it was titrated to prevent signs of inadequate anesthesia (sweating, facial flushing, movement and swallowing, HR > 90 beats/min without evidence of hypovolemia, and a 15 mmHg increase in SAP, compared with baseline SAP). Fentanyl 1 μg/kg was given if needed to resolve of signs of inadequate anesthesia.

Concentration of compound A, formaldehyde, and methadone were measured at preset interval: 30, 60, 90, 120, 150, 180 min after administration of sevoflurane. Blood and urine samples were taken at preset interval for analyzing concentration of inorganic fluoride: 1 hr after administration of sevoflurane and every 2 hr during maintenance of anesthesia.

Enrollment

178 patients

Sex

All

Ages

19+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

  • Patients scheduled for elective surgery under general anesthesia
  • American Society Anesthesiologists Physical Status (ASA PS) 1 or 2
  • Aged 19 years or above

Exclusion criteria

  • ASA PS 3 or above
  • aged under 19 years
  • Contraindications against the use of sevoflurane
  • Abnormal laboratory finding with clinical significance
  • Evidence of pregnancy
  • History of alcohol or drug abuse
  • Hemoglobin < 11 mg/dl
  • Neurological or psychiatric disease
  • Unable or unwilling to give informed consent

Trial design

Primary purpose

Treatment

Allocation

Randomized

Interventional model

Parallel Assignment

Masking

None (Open label)

178 participants in 2 patient groups

generic sevoflurane
Experimental group
Treatment:
Drug: generic sevoflurane
origianl sevoflurane
Active Comparator group
Treatment:
Drug: original sevoflurane

Trial contacts and locations

2

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Data sourced from clinicaltrials.gov

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