Prostate Implants Flashcards
stage for prost implants?
early stage
temp implant needs long/short t1/2?
long t1/2
perm implant needs long/short t1/2?
short t1/2 (tx more aggressive)
perm prost implant pt positioning/? anesthetic
spinal anesthetic, dorsal lithotomy position
perm prost implant isotopes
I-125 or Pd-103
perm prost implant interseed & needle spacing
1 cm
perm prost seed concerns
- hot/cold spots
- anisotropy
perm prost seed needle size
18 gauge
perm prost seed does not exceed ? rem over life of implant or ? mrem/hr
0.5 rem over life of implant; 5 mrem/hr
perm prost seed pt contact with others
does not have prolonged contact with preg women or children for 2 months
perm prost seed pt sex precaution
- no sexual activity for 2 weeks
- use protection after few weeks
perm prost seed implant survey meter used
GM tube or scintillation counter
temp prost isotope used
Ir-192
temp prost implant done at time of?
laparotomy & pelvic node sampling
temp prost implant # needles used
10-15 needles
temp prost implant dose ? Gy ? fx plus ?
- 10-25 Gy
- 3-4 fx
- plus 45 Gy XRT
temp prost implant procedure
- bladder hypaque &
- dummy seeds to take film of location
I-125 dose ? Gy @ ? cGy/hr
-145 Gy @ 5-10 cGy/hr
Pd-103 dose ? Gy @ ? cGy/hr
120 Gy @ 20-30 cGy/hr
prost implant TNM stage
T1-2a
prost implant Gleason score
Gleason <10
temp implant needs ? dose rate
sufficient dose rate
temp implant how long
3-4 days
perm implant needs isotope that emits photons of low/high E?
emits photons of low E
perm implant prescribed dose is delivered through ? decay of source
complete
perm prost seed needle length
21 cm long
