Pre-Operative Checkout List Preoperative Tests
4 - 4 046-004667-00 A7™ Operating Instructions
4.3 Pre-Operative Checkout List
4.3.1 Introduction
The purpose of the pre-operative checkout is to detect potential system problems before use.
An effective method for detecting pneumatic circuit occlusions, leaks, and other system problems
can be found in the A7 pre-operative checkout procedures. In addition, it is recommended that the
breathing circuit be tested for the ability to effectively deliver positive pressure ventilation before
beginning each case. Testing the ability to properly ventilate a test lung can quickly identify an
occluded circuit limb and other breathing circuit problems.
Before starting each case, test the machine’s ability to ventilate the patient by removing the
breathing bag from the bag arm and connecting it to the patient connection (elbow or Y-piece on
the disposable circuit). Set the ventilator to deliver a specific tidal volume to the test lung and verify
the exhaled tidal volume monitor. Observe that the test lung (breathing bag) inflates as the bellows
descends, and that the test lung deflates during the exhalation phase. Observe that the measured
exhaled volume matches the tidal volume set on the ventilator. With the ventilator running, lower the
fresh gas flow to zero and observe if the bellows rapidly falls with each exhalation. If this occurs, then
a leak should be suspected, identified, and repaired.
This test should be performed before starting each case. By verifying that a test lung (breathing bag)
can be manually and mechanically ventilated, this indicates that the A7 is capable of ventilating a
patient with the attached breathing circuit.
4.3.2 Suggested Pre-Operative Checkout List
Below is a suggested checkout list that should be conducted before administering anesthesia. This is
a guideline which users are encouraged to modify according to their local clinical practice. Such local
modifications should have appropriate peer review. Users should refer to the A7 operating
instructions for special procedures, precautions, and step-by-step instructions.
WARNING: To ensure proper machine operation, user safety, and patient safety,
follow all checkout procedures established by the facility before
administering anesthesia to the patient.
WARNING: Refer to the procedure ‘‘Preparation for Malignant Hyperthermia
Susceptible Patients’’ on page F-1 before applying A7 to malignant
hyperthermia susceptible patients.
Each day before administering anesthesia, the following should be done:
1. With the anesthesia machine connected to AC Power, turn the Mains switch to ON and verify
that the unit is operating on AC. Follow the on-screen prompts to perform and complete the
automatic machine start-up tests.
2. a. Check the O
2
Supply fail-safe message and alarm.
(See “O2 Pipeline Test” on page 4-19.)
b. Test low O
2
concentration alarm.
(See “Test the O2 Concentration Monitoring and Alarms” on page 4-28.)
c. Test high and low airway pressure alarms.
(See “Test the High Paw Alarm” on page 4-29.)
(See “Test the Low Paw Alarm” on page 4-29.)
d. Test low minute volume and apnea alarms.
(See “Test the Low Minute Volume (MV) Alarm” on page 4-28.)
(See “Test the Apnea Alarm” on page 4-28.)
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