[Experimental studies of kidney biopsy by natural orifices: transgastric and transvesical combined approach].
OBJECTIVE
To evaluate the feasibility of kidney biopsy by transgastric and transvesical combined approach in the porcine model.


METHODS
Five female pigs (20 to 30 kg) were included in this study. All procedures were performed with pigs under general anesthesia. The transvesical access was established by the ureteroscope. Then monitored by ureteroscopy, the transgastric access was established by a needle knife with cautery. The puncture dilation was performed with balloon through the gastroscope. The vesical hole was enlarged with the dilator of ureteroscope sheath. The kidney biopsy was finished by the scissor from the transvesical access and the grasping forcep from the work channel of gastroscope.


RESULTS
Among five cases the procedure were successful in three cases with 380 min, 180 min, 78 min respectively. Establishment of transvesical and transgastric accesses took place without complications. The exposure and biopsy of the kidney were easily achieved during operation. The transgastric and transvesical access were not closed in the end.


CONCLUSIONS
This new method is a technically feasible procedure in a porcine model. But the safety and the clinical future of it needs more study.
Sun
Ying-Hao
YH
Department of Urology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China. sunyh@medmail.com.cn
Yang
Bo
B
Zhou
Tie
T
Wang
Lin-Hui
LH
Xu
Chuan-Liang
CL
Hou
Jian-Guo
JG
Xu
Bin
B
Xiao
Liang
L
Wang
Hui-Qing
HQ
D000818:Animals; D001707:Biopsy, Needle / Q000379:methods*; D005260:Female; D005773:Gastroscopy; D007668:Kidney / Q000473:pathology*; D013552:Swine; D018666:Ureteroscopy