Operating Theatre Radiography Flashcards
The OT team comprises of?
Surgeons
Anaesthetists
Scrub & Circulating nurses
Operating theatre assistants
Radiographer
Where does OT Radiography operates?
Operating Theatre
Post Anaesthesia Care Unit (PACU)
Day Surgery
What are the imaging requests in OT?
Orthopaedic schedules/request real-time medical image
Surgeon requires imaging support
What is the purpose of the induction room?
Used for administration of local and spinal anaesthetics, general anaesthetics and sedations, patient monitoring and preparation prior to procedure.
What is the purpose of a scrub room?
Handwashing
Gloving
Gowning using aseptic techniques.
*Lead apron to be worn underneath the gown.
What is the purpose of the preparation/equipment room?
Keep accessories and extra apparatus
What is the sluice room?
Dirty or soiled utility room for disposal of waste products generated during surgery, reducing cross-infections.
What are some key points of Aseptic Technique?
Scrubbed personnel operate within sterile field
Sterile drapes are used to establish sterile field
All items within a sterile field should be sterile
All personnel moving within or around a sterile field should do so in an orderly manner to maintain the integrity of the sterile field.
What is the difference between sterile and clean technique?
Sterile = Eliminate germs
Clean = Reduce germs
What are some examples of clean technique?
Hand rub
Putting on plastic apron
Keeping surroundings clean
What are some radiation safety measures in the OT?
Control the use of ionising radiation e.g. alarm at 5mins
Time, Distance, Shielding (STD)
- Use of warning signs
- Everyone face forward
- Audible warning
- Use of lead shields
What is fluoroscopy?
A type of medical imaging that shows a continuous X-ray image on a monitor, much like an X-ray movie. During the procedure, movement of a body part or contrast agent through the body can be seen in detail.
Why do fluoroscopic images appear inverted grayscale (black/white is reversed) compared with standard radiographs?
Hardware Differences
low atomic densities = low attenuation
Input phosphor glows brightly > camera target becomes highly excited > video signal is strong > light area on monitor.
Features of a mobile C-arm
Image Intensifier (II)/Flat Panel Detector
X-ray Emitter (Source)
Mobile Console
Real time (Fluoro)/Single Shot pedals
X-ray Monitors
Fixed SID
Round field of vision (FOV)
Low mA compared to routine X-ray
What is ABC and its function?
Automatic Brightness Control.
ABC actively monitors the thickness of the patient and adjust the X-ray intensity.
Through the image feedback system, the received brightness is compared to a referenced brightness. if matched, the kV and mA will not be changed.
Brightness too bright -> decrease exposure
Not bright enough -> increase exposure
