title: Double-lumen needle for percutaneous ureteral pressure-flow studies.
abstract: Ureteral perfusion studies in patients without preexisting renal access currently must be intermittently interrupted for intrarenal pressure measurement. A double-lumen needle has been successfully placed in four patients (two with native and two with transplanted kidneys). This permits simultaneous perfusion and intrarenal pressure monitoring yet maintains the safety and ease of use of a single skinny needle.
authors.affiliation: Department of Radiology, University of Minnesota Hospital and Clinic, Minneapolis 55455.
authors.forename: D H
authors.initials: DH
authors.lastname: Epstein
authors.forename: D W
authors.initials: DW
authors.lastname: Hunter
authors.forename: C C
authors.initials: CC
authors.lastname: Coleman
authors.forename: B J
authors.initials: BJ
authors.lastname: Derauf
authors.forename: C
authors.initials: C
authors.lastname: Krenzel
authors.forename: B W
authors.initials: BW
authors.lastname: Schlam
authors.forename: G P
authors.initials: GP
authors.lastname: Moradian
authors.forename: F
authors.initials: F
authors.lastname: Castaneda
authors.forename: W R
authors.initials: WR
authors.lastname: Castaneda-Zuniga
authors.forename: K
authors.initials: K
authors.lastname: Amplatz
mesh_terms: D006801:Humans; D009339:Needles; D009403:Nephrostomy, Percutaneous / Q000295:instrumentation; D011312:Pressure; D014513:Ureter / Q000503:physiopathology*; D014517:Ureteral Obstruction / Q000175:diagnosis; D014563:Urodynamics; D014572:Urology / Q000295:instrumentation*