Case Coverage Flash Cards
a high level overview of procedure steps, patient positioning, processes ect
What is the probe starting position
MIddle of prostate, positioned facing the ablation target zone
Manual probe insertion steps
- Dialate rectum 2 fingers2. Apply a thin layer of US gel3. Ballon is deflated enough to slide in without resistance
What is the purpose of the sliders on the transverse/longitudinal views
Used to measure the prostate volume
What is the purpose of the US prostate scan
Creates 3D representation of the organ in real time
Describe the scanning workflow
Scans the postate along the long axis between end points
Prostate scanning steps
- Place the probe above the bladder neck manually2. Use sw arrow buttons to move probe between the apex and 2nd point
Describe the ablation process
Focused US soundwaves heat tissue, causing cavitation effect
Pads/straps are used to support what 3 areas
- back2. legs3. feet
When positioning the patien twhat special considerations are required for the chest/shoulders
between 20-30 degree angle to the axis of the bed, chest proud and not collapsing in either direction
Goals of a resection prior to treatment
- decrease a large prostates volume2. Reduce post-procedure urinary retention
Why is a colon prep required
- Protects the rectum2. allows optimal energy of sound waves3. infection control
What are the four most important patient positioning areas
- Pelvis2. Angled knees3. Back 20-30 degrees to the bed exis4. upper back proud and not collapsed
What patient data must be input to continue the procedure
Fields with an *Focal Pak CodeTreatment protocolTreatment Strategy
What is not required, but recommended to increase patient comfort and reduce urinary retention post procedure
catheter
The Focal Pak is a reposible
No
What are four purposes of the Focal Pakl
- ensures propogation2. indicates code3. Cools rectal wall4. Provides latex probe cover
What is the most important landmark when defining the ablation area
Apex
What is the last slice to be ablated on the bladder side
The defined upper limit
Between what landmarks is the length of the ablation zone measured
Distance between A and U
Which direction does the firing process follow
L to U
Benefits of lesion contour step
It better defines the ablation zone, more information
Landmarks to consider when on the apex side of prostate
- Urethra2. sphincter
This isnt nessessary when naviating the upper slides from the side of the apex
no yellow lines
What does A represent
Anatomic Apex
What does L represent
First slice on the apex side
What does U represent
Last slice on bladder neck side
2 solid yellow lines creating a wedge, represents
Heat diffusion zone
What funcation does dark blue represent
contouring tool
Light blue
Focal points auto-placed
What are the 5 fusion steps
- Import T2 MRI/multiparrameter2. Contour prostate on MRI3. Countor target or ROI4. Contour prostate on US 5. Complete elastic fusion
What are the 3 steps of fusing a US with BX
- Load BX data2. Contour US image3. Complete eleastic fusion
Min number of times prostate/target is contoured
3
On which image will the limits be placed on the prostate
Longitudinal
What are the 4 procedure steps without using fusion
- Image aquisition2. Prostate volume measured3. A, L, U limits placed4. Transverse contour5. lesion firing
What barriers to US soundwaves are found during the prostate scan
- Gas2. Calcifications
Final patient positinging 4
- Back 20-30 degrees relative to the bed axis2. Pelvis at the right bottom cornor of the bed3. Knees lifted and in line with left lef4. Bony promentories are paded and stapes secure the patient in position
How is the balloon inflated
Un-clamp at the Ablasonic tube
5 contra-indications for Focal One HIFU
- Localized in the anterior apex2. Any rectal abnormalitities like shadow on US3. Prostate calcifications4. Prostorectal space is bigger than 10mm5. Patient has latex allergy
When patient is in the final position before the procedure starts, what is the critical thing to check prior to starting
patient is secured to the bed and all potential patient movement is mitigated
What anthastisia equipment should not be used during the procedure
No2 gas, it effectives the efficiency and safety
Patient preparation step that allows propagation of US energy and protects the rectum
Colo-prep
Purpose of the triangle shaped cushioon
Protects the right shoulder during the procedure
What 4 things need to be considered when moving the patient into lat d
- Pelvis at bottom right cornor2. angled knees3. Back is 20-30 degree angle from the bed axis4. Upper back is neautral, no lean one way or another
How is the left arm positioned
Using and arm support and a cushion
what two conditions need to be met before locating the lesion
A, U, L Treatement area defined
What letter deffines the anatomic apex
A
When defining the leasion, where should L be placed
- left of apex2. lower limit of target location
What is the A to L distance
Part of the prostate not being treated
How is the target area defined
It is the distance between lower and upper limit
Where is the orange line positioned
Exactly at the interface between the balloon and rectal wall
What is the relationship between the balloon and rectum
Must be in direct contact
Which button on the mouse is used to define the contours
Left
What is the lesion safety distance
3 mm
What is the 4 step process to pause and change the contour area
- pause2. modify3. re-draw4. fire
Next step when rectum/transducer are less than 1 mm apart
Fire
Distance between the transducer and rectum is 1-4 mm
Retry with auto followCancel shotadjust probe
Desired distance beween probe and rectal wall
23 mm
Occurs when the probe is not at 23mm from the rectal wall
- focal one will readjust or trigger a non-dectection fault
When is each new area defined
After each scan
What are the 5 stages of prostate/ROI contouring
- open contouring software2. import mri3. define prostate and suspected zone contour4. copy images and 3 contours to usb5. import into focal 1
“No volume detected:
US on HIFU screen reverts to last imagefusion can be performedif fusion is done, it can’t be transfereed
“New volume, do you want it displayed”
- Yes2. Us will be the last image3. Fusion can be done4. ROI can be transfered to plan lesions
“New volume detected”.
New US image was created
How long does the fusion process take to complete
1-2 minutes
ROI and Prostate contour buttons are displayed when 5
- fusion ends correctly2. MRI/US are correcte3. padlock closed4. “fusion” display selected 5. Fusion not canceled
SV on MRI image
L Limit
Apex on MRI
R limit
Describes every identified region on MRI or BX
region of interest
cross section position loaded to correspond to selection displayued on main screen
Synchronized slice position
Process if the patient needs to be re-positioned 4
- “New aqusition”2. Remove prove and purge balloon3. Correct positoin4. Start again
Measure prostate volume steps 5
- Display prostate at widest/longeset2. define length3. define width4. values displayed5. Volume info box checked
“U”
Define upper limit after aquisition
Lower limit of prostate length when getting volume
“A” position
What is required to localize lesion
- Limits A/L/U 2. Define treatment area
Access to hemi-ablation option
Right click on prostate