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

2014-07-24 14:06:43 | BioPortfolio


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.


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.

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment


General Anesthesia


original sevoflurane, generic sevoflurane


Asan Medical Center
Korea, Republic of




Asan Medical Center

Results (where available)

View Results


Published on BioPortfolio: 2014-07-24T14:06:43-0400

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Anesthesia is the loss of feeling or sensation in all or part of the body. It may result from damage to nerves or can be induced by an anesthetist (a medical professional) using anesthetics such as thiopental or propofol or sevoflurane during a surgical ...

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