Chpt. 13 - Key Points Flashcards Preview

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Flashcards in Chpt. 13 - Key Points Deck (16):

Name some of the potential health risks presented by anesthesia

- Exposure to WAG
- Exposure to hazardous injectable agents
- Accidents associated with handling of compressed gas cylinders


When and where are WAGs and vapors breathed by all personnel?

- Working in areas in which animals are anesthetized or are recovering from inhalation anesthesia
- Filling or emptying vaporizers
- Cleanup of accidental spills


Name some short term problems related to exposure to WAGs



Long-term WAG exposure

Reproductive disorders
Liver damage
Kidney damage
Nervous system dysfunction
!!!Avoid exposure to high levels of WAGs, especially when pregnant!!!


Methoxyflurane and halothane

Considered to be a greater hazard than isoflurane and sevoflurane, as they undergo significant hepatic metabolism and renal excretion whereas iso and sevo are minimally eliminated by these routes.


Volatile WAGs apparently do not ...

... have oncogenic (cancer-causing) effects.


NIOSHs recommendation for WAG concentrations

Limit exposure to 2 parts per million (ppm) or less for halogenated anesthetics (0.5 ppm or less if nitrous oxide is concurrently used).


Why do surveys in veterinary clinics show wide variations in WAG levels?

The levels depend on the sampling site, scavenging system, and anesthetic techniques used.


How to greatly reduce WAG exposure.

Install and use of an effective gas scavenging system
(caution should be used to prevent the scavenger from applying negative pressure to the breathing circuit)


Leak testing

Equipment leak testing should be done on a daily basis to detect and allow correction of leakage from the anesthetic machine and compressed air cylinders.
Tests should be done on both the high-pressure and low-pressure components of the machine.


What anesthetic techniques are associated with excessive release of waste gas?

Use of anesthetic chambers
Use of anesthetic masks
Use of uncuffed ET tubes


What procedure reduces WAG contamination of hospital air?

Turning off the vaporizer before disonnecting the animal from the machine


Filling and emptying the vaporizer

Should be done with care, using appropriate equipment and protective clothing.


WAG levels may be monitored by?

Professional occupational hygienists
By the use of detector badges


Care of compressed air cylinders

They should be transported, used, and stored with care.
Special hazards include risk of fire in areas in which cylinders are stored and the risk of sudden release of pressurized gas from damaged cylinders.


Etorphine - potent injectable opioid

Potent injectable opioids such as etorphine have considerable potential to cause serious, even fatal reactions.
Special training is necessary to safely handle these agents, and a narcotic reversing agent must be readily available in case of human exposure.