Radiology; Labs 8,9,10 &11
Terms
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- Rapid processing chemicals
- What are the chemicals that will develop/process dental film in <2 mins called?
- body part being radiographed
- Ideallly, what is the film parallel to?
- Right lateral
- What position should the animal be in if it is large enough?
- bisecting angle technique
- If a film cannot be placed parallel to a tooth, what technique is used?
- Neg. contrast cystogram
- When air is injected into bladder, what kind of cystogram is this?
- dysuria, pollakiruia, crystalluria, anuria, incontinence, chronic unresponsive hematuria
- What are 6 things that could indicate the need for a cystogram?
- .85-1.15
- What should the densitometer numbers read for good cassettes/screens?
- See bladder contents, see expandability, see structure, evaluate vesicoureteral valves, see ruuptured bladder
- What are some reasons why cystography might be preformed in the patient? (5)
- eyeball from 2 different angles, use a carpenters level
- How do you determine if the x-ray tube is level?(2 ways)
- neg. contrast cysto procedure with 5ml of hypaque added afterwards
- What is a double contrast cystogram?
- 5ml/#
- How much hypaque contrast material is injected?
- high mAs, low kVp
- What is the rule of thumb for exotics when referring to the mAs/kVp?
- with the dimple toward dental x-ray unit
- How must dental film be placed in the mouth?
- Expose half a film to the room with the lights off for 2 mins then develop and compare sides.
- How do you check the darkroom for light leaks?
- to prevent straining
- Why do we inject 5ml of 2% lidocaine into the emptied bladder?
- That some x-rays are released
- What can exposing the screens in the dark to x-rays and watching it flouresce indicate?
- foreshortening/elongation of the teeth
- If the bisecting angle technique is not used properly, what can it lead to?
- non-screen film
- What kind of film is used in the mouth for dental radiography?
- Manual, plexiglas tubes, wrap in towel, tranquilize, sandbags/other barriers
- What are some ways of restraining exotics?(5)
- Small time fraction because they breathe so fast
- Why do you need a high mA setting with exotics?
- 5ml/#
- For the neg. contrast cystogram, how much air is injected?
- Positive contrast cystogram
- When a hypaque material is injected into the bladder, what kind of cysto is this?
- Place 8 pennies along both sides of the collimation and expose film. see if it is less than 1 penny off.
- What is the penny collimation test?
- Expose 4 films at the same time and compare the blackness/ measure with the densitometer
- How do you check the screens for quality?
- 4x light given off and very fast film
- Why are rare earth screens often used with exotics?
- Time
- What is the only value that can be changed on the dental unit?
- ARK
- What anesthetic protocol is used to anesthetize the patient for cystography?
- No
- So the contrast materials need to be removed from the bladder after the procedure is complete?
- 2 mins
- How long do you wait for the injected lidocaine to take effect?