eleventh DaY of aTtachMent
While i was reading the service manuals of rehab device which helps to regulate blood circulation for resting or patients who are unable to walk, Mr Sin came and told me that i will be having a 2-day training course on 19th and 20th April with my colleague, Lee Chong at Tyco Healthcare. The training will be about the maintenance and repairing of the latest model of ventilator. He told me more about ventilators in order for me to have better understanding and idea of how ventilator works and different type of it before undergoing the training. Before trying out the transport ventilator, oxylog 2000 from Drager Medical, i had to deliver a injection device to the day surgery which was done with the maintenance and collected a infusion pump ST 503 from ward 4.
I initially thought that i just have to to the leakage current test but after a while, i realised that i also have to do the flow and occlusion test. Careless of me to forget about the 2 main important tests for the maintenance for the infusion pump. when i am about to test the device, the tubing clamp is unable to close so i went to separate the mechanical parts and adjust the metal rodto be in line with the screw. After a few minutes, another problem arised, clip that prevent the rod from slipping and the rod were bented so went to change them. i found out that the solution is able to leak into the device which caused some problem to the it. while i was trying the first test which is the occlusion test, i found out that the pump's occlusion sensor is not working so i told Lee Chong as i only allowed to do minor repair with my colleagues' supervision.
After spending about 2 hours doing it, i started trying out the ventilator and see how it actually works. i took me quite some time to figure out how to connect the tube, flow sensor and etc. An oxygen tank is required no matter whether you are doing a preventive maintenance or connect to the patient. for the test, we are using a patient "lung" which a elastic rubber which able to hold up to a capacity of 2 litre. I was afraid if i turn the knob to the maximum capacity of the device, will the rubber ballon burst? so Mr Sin reassured that it will not as the maximum capacity is 1.5 litre. i just found out that the breath rate increases, the duration for inspiration and expiration become shorter. it is quite similar to what i have learnt in school as the frequency of a signal increases, the period will be shorter. The flow sensor has 2 chambers which each has a opening for the tube to connect to the device and a flap in between the chambers. Before the machine is placed to the patient, the device will do a self test which is checking for any offset flow. The offset flow value is being determined by the direction and the angle of the flap. The flow of the air is also being determined by the pressure difference between the 2 chambers. The final flow value is being calculated by substrating the flow value that is being detected by the offset value if there is any offset. everything is being done automatically by the device. I tried out how to do a preventive maintenance of the ventilator with the guidelines from the service manual.
Before ending my work, i sent back a device back to ward 4.
I initially thought that i just have to to the leakage current test but after a while, i realised that i also have to do the flow and occlusion test. Careless of me to forget about the 2 main important tests for the maintenance for the infusion pump. when i am about to test the device, the tubing clamp is unable to close so i went to separate the mechanical parts and adjust the metal rodto be in line with the screw. After a few minutes, another problem arised, clip that prevent the rod from slipping and the rod were bented so went to change them. i found out that the solution is able to leak into the device which caused some problem to the it. while i was trying the first test which is the occlusion test, i found out that the pump's occlusion sensor is not working so i told Lee Chong as i only allowed to do minor repair with my colleagues' supervision.
After spending about 2 hours doing it, i started trying out the ventilator and see how it actually works. i took me quite some time to figure out how to connect the tube, flow sensor and etc. An oxygen tank is required no matter whether you are doing a preventive maintenance or connect to the patient. for the test, we are using a patient "lung" which a elastic rubber which able to hold up to a capacity of 2 litre. I was afraid if i turn the knob to the maximum capacity of the device, will the rubber ballon burst? so Mr Sin reassured that it will not as the maximum capacity is 1.5 litre. i just found out that the breath rate increases, the duration for inspiration and expiration become shorter. it is quite similar to what i have learnt in school as the frequency of a signal increases, the period will be shorter. The flow sensor has 2 chambers which each has a opening for the tube to connect to the device and a flap in between the chambers. Before the machine is placed to the patient, the device will do a self test which is checking for any offset flow. The offset flow value is being determined by the direction and the angle of the flap. The flow of the air is also being determined by the pressure difference between the 2 chambers. The final flow value is being calculated by substrating the flow value that is being detected by the offset value if there is any offset. everything is being done automatically by the device. I tried out how to do a preventive maintenance of the ventilator with the guidelines from the service manual.
Before ending my work, i sent back a device back to ward 4.
posted by Michelle Tham @ 5:05 AM
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