Category: Clinical Stones: PCNL

MP26-6 - Posterolateral and Retrorenal colon in the Supine, and Prone Positions on Computed Tomography : Consideration for Percutaneous Nephrolithotomy Approach

Sun, Sep 23
10:00 AM - 12:00 PM

Introduction & Objective :

To establish patterns of anatomic changes relevant to the kidney and colon during positional change between the supine and prone positions as noted on computed tomography (CT) scans performed during percutaneous nephrolithotomy (PCNL).


Methods :

Patients scheduled PCNL were enrolled in the study and underwent CT in supine and in prone position from February 2017 to May 2018. Imaginary lines for the posterior calyx of upper/mid/lower poles of both kidneys in prone and supine position were compared. Lines drawn horizontally in the coronal plane in contact with the each anterior/mid-calyx/posterior edge of the kidney (fig 1). Colons divides into four zones by those lines ; 3 was defined as posterolateral, and 4 as retrorenal colon.


Results :

102 patients with CT images were included in the present study, 13 patients (12.7%) had posterolateral and retrorenal colon in supine position, of which 4 (3.9%) were on the left side, 5 (4.9%) on the right side and 4 (3.9%) had bilateral posterolateral and retrorenal colons (Table 1). 25 patients (24.5%) had posterolateral and retrorenal colon in prone position, of which 17 (16.7%) were on the left side, 2 (2.0%) on the right side and 6 (5.9%) had bilateral posterolateral and retrorenal colons, then left lower showed a significantly higher incidence (p).


Conclusions :

In accessing the lower pole of the kidney, especially on the left side, the risk of posterolateral and retrorenal colon should be taken into consideration during percutaneous procedures, additional prone CT is more useful in colon positioning.

Hyuk Jin Cho

Assistant Professor
Catholic University of Korea Seoul Saint Mary's Hospital
Seoul, Seoul-t'ukpyolsi, Republic of Korea

Sungmin Kang

Seoul, Seoul-t'ukpyolsi, Republic of Korea

Hyong woo Moon

Seoul, Seoul-t'ukpyolsi, Republic of Korea

Kyu won Lee

Seoul, Seoul-t'ukpyolsi, Republic of Korea

Sae Woong Choi

Seoul, Seoul-t'ukpyolsi, Republic of Korea

Woong Jin Bae

Seoul, Seoul-t'ukpyolsi, Republic of Korea

U-syn Ha

Professor
CATHOLIC UNIVERSITY MEDICAL COLLEGE
Seoul, Seoul-t'ukpyolsi, Republic of Korea

U-Syn Ha, M.D., Ph.D.
Assistant Profeesor
Department of Urology, Seoul St. Mary's Hospital
The Catholic University of Korea, College of medicine
banpodaero 222, Seocho-gu, Seoul, Korea

Sung-hoo Hong

Seoul, Seoul-t'ukpyolsi, Republic of Korea

Ji Youl Lee

Seoul, Seoul-t'ukpyolsi, Republic of Korea

Sae Woong Kim

Seoul, Seoul-t'ukpyolsi, Republic of Korea

Kang Sup Kim

Clinical assistant professor
Department of Urology, Incheon St. Mary's Hospital The Catholic University of Korea, College of medicine
Incheon, Inch'on-jikhalsi, Republic of Korea

Kang Sup Kim (金 彊 燮), M.D., Ph.D

Clinical assistant professor
Department of Urology, Incheon St. Mary's Hospital
The Catholic University of Korea, College of medicine
59 Dongsu-ro, Bupyeong-gu, Incheon, Republic of Korea
Tel +82-32-280-5120 (Department office)

+82-32-280-5852 (Private office)
C.P. +82-10-3283-0876