Includes examination and documentation of piped-in gas connections and cylinder yoke assemblies; confirmation of flow accuracy of the flow meters; physical inspection of oxygen flush valve; physical inspection and cleaning of CO2 absorber; replacement of gaskets and seals as necessary; inspection of all tubing, connections and fittings, with replacement as necessary; and a physical examination of your vaporizer.
Precision Vaporizer Services
This requires that the vaporizer be removed from your anesthesia machine; a comparable loaner is provided at no charge during your vaporizer’s service. Service of a precision vaporizer is NOT something that can be performed on-site. At the service center your vaporizer will be completely dismantled and cleaned; wicks, seals and gaskets will be replaced; worn or damaged parts will be replaced as needed; the vaporizer is then reassembled and recalibrated; multi-phase testing is performed to verify percentage output concentrations to factory specifications. Your freshly serviced vaporizer is then returned to you with a one-year warranty.
We will deliver or ship a serviced and calibrated vaporizer to be exchanged for yours. You will keep the vaporizer until your next servicing. The exchange vaporizer is unconditionally guaranteed for one year.
If our technician delivers and installs the exchange unit, a service call fee will apply.
If we ship the exchange vaporizer to you there will be no service call fee. You will simply place your original vaporizer in our same box for pickup and return to us by means of a UPS call tag which we will arrange. We will keep your original vaporizer as part of the exchange program. As an added savings, this servicing has a lower price than the full service where your original vaporizer is returned to you.
Pricing is for servicing and calibration service only; additional charges will apply if damaged parts have to be repaired or replaced on your original vaporizers. This service does not apply to Dupaco anesthesia machines.
Full price of serviced vaporizers will apply if your old vaporizers are not returned to us within 30 days.
In-office Vaporizer Analysis
Includes an external physical examination of the vaporizer and a vaporizer efficacy test, which confirms that the percentage concentration set on the vaporizer dial is the percent concentration being delivered. A high-pressure leak test is performed to confirm leakage is not present. This service does nothing to repair or replace gaskets, wicks or seals of the vaporizer. It is offered as an occasional alternative for, but not a replacement of, full servicing of the vaporizer.
Anesthetic waste gases can include any gas from the anesthesia machine which passes the patient without being inhaled, as well as any gases the patient exhales. Trace gas can occur due to leaking equipment, method of filling vaporizers, spillage, etc. It is assumed that prolonged and repetitive exposure to anesthetic gases can be toxic to procedure area personnel. Consequently, NIOSH has recommended Permissible Exposure Limits (PEL’s) for anesthetic agents. The PEL established for halogenated anesthetics is 2 parts per million (PPM). When NIOSH made the recommendation in 1978, newer anesthetic agents such as isoflurane, sevoflurane and desflurane were not a part of the original study. However, the recommendation should be applied to these agents until updated recommendations are made.
Trace and Waste Anesthetic Gases
Containing Anesthetic Gas
With respect to specific methods or products, OSHA makes no recommendations as to how to comply with these limits. All anesthetic gases must be contained as they travel to and from the patient. Since gas is constantly being delivered to the patient, there is always an excess that needs to be either evacuated from the area or filtered such that all the anesthetic agent is removed.
Evacuation of waste gas from the area without filtering means that the gas must continue to be contained until it can be released to the outside atmosphere. Channeling to the outside requires oversight to ensure that all connections are leak free. Testing must be done to assure that the number of bends in the evacuation line, as well as the overall length, does not cause resistance to the flow of gas from the anesthesia machine. Evacuation lines must be checked periodically to assure they are clear of obstructions.
Filtering means the gas is run through an adsorbent material such as activated charcoal, which collects and holds onto the anesthetic molecules while allowing the oxygen and CO2 to pass through. Activated charcoal, when used as a filter medium, has oversight requirements as well. Once the charcoal is saturated, anesthetic gases which pass through will NOT be adsorbed – this is referred to as break-through. Activated charcoal can adsorb roughly 25% of its own weight by volume. Small charcoal canisters should have their saturation levels monitored by weight on a daily basis. Protocols should include weighing the canister prior to use, recording the initial weight on the canister and then reweighing the canister after each use. Once saturated, the filter should be discarded.
Passive vs. Active Evacuation
Passive evacuation occurs when the gas flow from the anesthesia machine pushes the waste gases, via the path of least resistance, to the outlet (atmosphere) or filtering canister. Active evacuation involves applying negative pressure (suction) to the evacuation circuit. These methods have caveats that must be considered. In the passive system, a leak in the evacuation circuit could cause the waste gases to leak “outward” into the procedure area. Diligence in checking the system for leaks is required. In the active system, if negative pressure reaches the patient’s nosecone, it may pull the anesthetic gases past the nosecone, depriving the patient of the delivered concentration of gas. If operating with a loose fitting mask, a dilution of the delivered concentration may occur, thus giving the appearance that there is something wrong with the anesthesia machine. Precautions must always be taken to ensure the negative pressure never reaches the anesthesia machine or the patient’s breathing circuit.