TY - JOUR
T1 - MR-guided percutaneous nephrostomy of the nondilated upper urinary tract in a porcine model
AU - Merkle, Elmar M.
AU - Hashim, Mufaddal
AU - Wendt, Michael
AU - Lewin, Jonathan S.
PY - 1999/5
Y1 - 1999/5
N2 - OBJECTIVE. The purpose of this study was to assess the safety and feasibility of MR-guided percutaneous nephrostomy of the nondilated contrast- enhanced upper urinary tract in a porcine model. SUBJECTS AND METHODS. Six MR-guided percutaneous nephrostomies of the nondilated upper urinary tract were performed in four domestic farm pigs (body weight range, 20-25 kg) using a 0.2-T system. Ten minutes after IV administration of 0.2 mmol/kg of gadodiamide and 0.4 mg/kg of furosemide, a fast T1-weighted sequence was used to guide insertion of an 18-gauge MR-compatible needle into a predetermined calix. After confirmation of needle position using a turbo spin-echo T1- weighted sequence, a 0.035-inch catheter coated with superparamagnetic iron oxide was inserted during MR monitoring. Insertion was followed by tract dilatation and insertion of a 4-French sheath. The final position of the sheath was confirmed by injection of diluted superparamagnetic iron oxide into the collecting system. RESULTS. Needle insertion was successful for all six procedures, with no complications. Instrumentation time ranged from 4 to 13 min (mean, 6 ± 4 min). Sheath placement was successful in five of six kidneys. Placement time ranged from 6 to 28 min (mean, 16 ± 9 min). CONCLUSION. MR-guided percutaneous nephrostomy of the nondilated contrast- enhanced upper urinary tract in a porcine model is feasible and safe.
AB - OBJECTIVE. The purpose of this study was to assess the safety and feasibility of MR-guided percutaneous nephrostomy of the nondilated contrast- enhanced upper urinary tract in a porcine model. SUBJECTS AND METHODS. Six MR-guided percutaneous nephrostomies of the nondilated upper urinary tract were performed in four domestic farm pigs (body weight range, 20-25 kg) using a 0.2-T system. Ten minutes after IV administration of 0.2 mmol/kg of gadodiamide and 0.4 mg/kg of furosemide, a fast T1-weighted sequence was used to guide insertion of an 18-gauge MR-compatible needle into a predetermined calix. After confirmation of needle position using a turbo spin-echo T1- weighted sequence, a 0.035-inch catheter coated with superparamagnetic iron oxide was inserted during MR monitoring. Insertion was followed by tract dilatation and insertion of a 4-French sheath. The final position of the sheath was confirmed by injection of diluted superparamagnetic iron oxide into the collecting system. RESULTS. Needle insertion was successful for all six procedures, with no complications. Instrumentation time ranged from 4 to 13 min (mean, 6 ± 4 min). Sheath placement was successful in five of six kidneys. Placement time ranged from 6 to 28 min (mean, 16 ± 9 min). CONCLUSION. MR-guided percutaneous nephrostomy of the nondilated contrast- enhanced upper urinary tract in a porcine model is feasible and safe.
UR - http://www.scopus.com/inward/record.url?scp=0032733564&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032733564&partnerID=8YFLogxK
U2 - 10.2214/ajr.172.5.10227492
DO - 10.2214/ajr.172.5.10227492
M3 - Article
C2 - 10227492
AN - SCOPUS:0032733564
SN - 0361-803X
VL - 172
SP - 1221
EP - 1225
JO - American Journal of Roentgenology
JF - American Journal of Roentgenology
IS - 5
ER -