PMID- 30595058
OWN - NLM
STAT- MEDLINE
DCOM- 20200326
LR  - 20200326
IS  - 1557-900X (Electronic)
IS  - 0892-7790 (Linking)
VI  - 33
IP  - 2
DP  - 2019 Feb
TI  - The Effect of Ratio of Endoscope-Sheath Diameter on Intrapelvic Pressure During 
      Flexible Ureteroscopic Lasertripsy.
PG  - 132-139
LID - 10.1089/end.2018.0774 [doi]
AB  - PURPOSE: To clarify appropriate combinations of flexible ureteroscope (FURS) and 
      ureteral access sheath (UAS), which can maintain a low intrapelvic pressure (IPP) 
      during FURS with lasertripsy. METHODS: Four kinds of FURSs (Polyscope, Olympus 
      URF-P6, Stroz Flex-X(c), and Olympus URF-V) and six sizes of UASs 
      (11/13F x 36 cm, 11/13F x 46 cm, 12/14F x 36 cm, 12/14F x 46 cm, 13/15F x 36 cm, 
      and 13/15F x 46 cm) were tested. A novel gas-liquid-pressure-control system 
      (GLPCS) was used to maintain a stable and adjustable irrigation pressure form 
      50-500 cmH(2)O. IPPs and flow rates were recorded with different combinations of 
      FURSs and UASs by using an in vitro fresh cadaveric porcine urinary system. 
      RESULTS: The GLPCS can provide stable and adjustable water pressure. The ratio of 
      outer diameter of FURSs and inner diameter of UASs (Ratio of Endoscope-Sheath 
      Diameter-RESD) is essential to the IPP and flow rate. The highest IPP group is 
      the combination of Olympus URS-V and 11/13F UAS with RESD of 0.87-0.88, the IPP 
      is over 40 cmH(2)O when irrigation pressure comes to 250 cmH(2)O; Olympus URS-V 
      in 12/14F UAS is at the middle group, RESD values of 0.81-0.82, IPP reaches 
      40 cmH(2)O at 500 cmH(2)O of irrigation pressure. Combinations with RESD </=0.75 
      enjoy low IPPs (<13 cmH(2)O). Polyscope with 13/15F UASs has the highest flow 
      rate (74.3-77.7 mL/min), whereas Olympus URS-V with 11/13F UASs has the lowest 
      flow rate (17.0-17.3 mL/min). UAS length has less effect on the IPP and flow 
      rate. CONCLUSIONS: To maintain a low IPP and acceptable flow rate during flexible 
      ureteroscope lasertripsy, RESD should be kept below 0.75. UAS length has less 
      effect on the IPP and flow rate.
FAU - Fang, Li
AU  - Fang L
AD  - 1 Department of Urology, Ningbo First Hospital, Ningbo Hospital of Zhejiang 
      University, Ningbo, China.
FAU - Xie, Guohai
AU  - Xie G
AD  - 1 Department of Urology, Ningbo First Hospital, Ningbo Hospital of Zhejiang 
      University, Ningbo, China.
FAU - Zheng, Zhong
AU  - Zheng Z
AD  - 1 Department of Urology, Ningbo First Hospital, Ningbo Hospital of Zhejiang 
      University, Ningbo, China.
FAU - Liu, Wanzhang
AU  - Liu W
AD  - 1 Department of Urology, Ningbo First Hospital, Ningbo Hospital of Zhejiang 
      University, Ningbo, China.
FAU - Zhu, Jiaqi
AU  - Zhu J
AD  - 2 Ningbo University, Ningbo, China.
FAU - Huang, Ting
AU  - Huang T
AD  - 2 Ningbo University, Ningbo, China.
FAU - Lu, Yunfei
AU  - Lu Y
AD  - 1 Department of Urology, Ningbo First Hospital, Ningbo Hospital of Zhejiang 
      University, Ningbo, China.
FAU - Cheng, Yue
AU  - Cheng Y
AD  - 1 Department of Urology, Ningbo First Hospital, Ningbo Hospital of Zhejiang 
      University, Ningbo, China.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - J Endourol
JT  - Journal of endourology
JID - 8807503
SB  - IM
MH  - Animals
MH  - Biomechanical Phenomena
MH  - Disease Models, Animal
MH  - Equipment Design
MH  - Kidney Calculi/*therapy
MH  - Lithotripsy, Laser/*instrumentation
MH  - *Pelvis
MH  - Pressure
MH  - Swine
MH  - *Ureter
MH  - *Ureteroscopes
MH  - Ureteroscopy/*instrumentation
OTO - NOTNLM
OT  - laser therapy
OT  - pressure
OT  - ureteroscopy
EDAT- 2019/01/01 06:00
MHDA- 2020/03/27 06:00
CRDT- 2019/01/01 06:00
PHST- 2019/01/01 06:00 [pubmed]
PHST- 2020/03/27 06:00 [medline]
PHST- 2019/01/01 06:00 [entrez]
AID - 10.1089/end.2018.0774 [doi]
PST - ppublish
SO  - J Endourol. 2019 Feb;33(2):132-139. doi: 10.1089/end.2018.0774.