Wash-in Period in Patients Undergoing Low Flow Anesthesia

Condition(s) studied

Study summary

Volunteers above the age of 18 and below the age of 60 who agreed to participate in the study were not exposed to any interventional intervention other than those routinely applied to the patient during and after the administration of the clinical standard anesthesia protocol. The value indicating the brain's response to hypnotic substances, the vapor concentration in the lung alveoli and the minimum amount of anesthesia gas used will be recorded at certain times. The aim of the researchers in the study was to observe the effect of two different fresh gas flow rates on the amount and cost of waste gas released into the atmosphere.

Eligibility

Primary outcome measure(s)

• Demographic data — preoperative
  Demographic data such as age (years), height (cm), weight (kg) and gender (male/female) of the volunteer patients will be analyzed to see if they are similar for both study groups.
• Duration of surgery — During the period of operation (2-4 hours)
  It will be examined whether the duration of surgery (minutes) is similar for volunteer patients
• Duration of anesthesia — During the period of operation (2-4 hours)
  It will be examined whether the duration of anesthesia (minutes) is similar for volunteer patients
• Heart rate — During the period of operation (2-4 hours)
  We will examine whether there is a difference in heart rate (beats/minute) values recorded at 5-minute intervals in the first half hour and at 15-minute intervals thereafter in volunteer patients
• Systolic blood pressure — During the period of operation (2-4 hours)
  The volunteer patients will be examined for differences in systolic blood pressure (mmHg) values recorded at 5-minute intervals in the first half hour and at 15-minute intervals thereafter
• Diastolic blood pressure — During the period of operation (2-4 hours)
  The volunteer patients will be examined for differences in diastolic blood pressure (mmHg) values recorded at 5-minute intervals in the first half hour and at 15-minute intervals thereafter
• Mean blood pressure — During the period of operation (2-4 hours)
  The volunteer patients will be examined for differences in mean blood pressure (mmHg) values recorded at 5-minute intervals in the first half hour and at 15-minute intervals thereafter
• Oxygen saturation — During the period of operation (2-4 hours)
  We will examine whether there is a difference between the oxygen saturation (%) values measured at 5-minute intervals in the first half hour and then at 15-minute intervals in volunteer patients.
• Total inhaled gas consumption — During the period of operation (2-4 hours)
  Total inhaled gas consumption (milliliter) at the end of anesthesia will be examined whether it is similar for volunteer patients.
• Minimum alveolar concentration (MAC) — During the period of operation (2-4 hours)
  Minimum alveolar concentration (MAC) values are recorded at 1-minute intervals in the first 10 minutes at the onset of anesthesia, at 5-minute intervals between 10 minutes and half an hour, and at 15-minute intervals after half an hour and will be examined for differences between volunteers.
• Bispectral index (BIS) — During the period of operation (2-4 hours)
  Bispectral index (BIS) values are recorded at 1-minute intervals in the first 10 minutes at the onset of anesthesia, at 5-minute intervals between 10 minutes and half an hour, and at 15-minute intervals after half an hour and will be examined for differences between volunteers.

Trial sites (3)