Manejo&
• Depende!de!Fpo!y!lugar!de!lesión.!Se!aconseja!la!reparación!inmediata!
• Ligadura,!lesión!parcial:!JJ!o!derivación!urinaria!con!nefrostomía!
• Lesión!completa:!!
– IO!reparación!primaria!o!reimplante!según!altura.!!
– Derivación!urinaria!en!caso!de!segmento&importante&con!reparación!diferida!
CHAPTER 42 ! Upper Urinary Tract Trauma 1183
2. Debride the ureter liberally until the edges bleed, especially
in high-velocity gunshot wounds.
3. Repair ureters with spatulated, tension-free, stented (Palmer
et al, 1983), watertight anastomosis; using fine absorbable
monofilament such as 5-0 polydioxanone; use optical mag-
nification and retroperitoneal drainage afterward.
4. Retroperitonealize the ureteral repair by closing peritoneum
over it.
5. With severely injured ureters, blast effect, concomitant vas-
cular surgery, and other complex cases, consider omental
interposition to isolate the repair when possible.
Ureteroureterostomy, or so-called end-to-end repair, is used in
injuries to the upper two thirds of the ureter. It is required com-
monly, up to 32% of the time in large series (Presti et al, 1989;
Elliott and McAninch, 2003), and has a reported success rate as
high as 90% (Carlton et al, 1971). Complications after ureteroure-
terostomy, usually urine leakage, occur 10% to 24% of the time
(Bright and Peters, 1977a; Pitts and Peterson, 1981; Presti et al,
1989; Campbell et al, 1992; Velmahos et al, 1996; Medina et al,
1998). Other acute complications include abscess and fistula.
Chronic complications, usually comprising ureteral stenosis, are
less common, involving approximately 5% (Palmer et al, 1999) to
12% (Velmahos et al, 1996) of patients. Interestingly, some authors
report prolonged leakage of urine from the drain in patients with
ureteral injury after external violence who underwent repair but
otherwise did well. Steers and colleagues (1985) reported that most
of their patients had persistent drainage (averaging 12 days) from
the retroperitoneal Penrose drain after repair. This has not been
our experience, but this observation might prompt watchful
waiting in such patients who leak persistently after repair. Routine
retroperitonealization of the repair may decrease the time or sever-
ity of postoperative urine leakage.
Management of dehiscence by percutaneous nephrostomy
placement and ureteral catheter placement for at least 6 weeks has
been reported in small studies, with a surprisingly good success
published data to assess its accuracy to date (Kenney et al, 1987;
Townsend and DeFalco, 1995). Reports of the utility of CT in
ureteral trauma are still limited to small numbers of cases.
Ureteral injuries can be difficult to diagnose on CT. If the
urinary extravasation from the ureteral injury is contained by
Gerota fascia, the extent of medial leakage can be small, obscuring
the diagnosis (Kenney et al, 1987). It is also known that ureteral
injuries often manifest with absence of contrast in the ureter on
delayed images. This underscores the absolute necessity of tracing
both ureters throughout their entire course on CT scans obtained
to evaluate urogenital injuries (Townsend and DeFalco, 1995). In
addition, because modern helical CT scanners can obtain images
before intravenous contrast dye is excreted in the urine, delayed
images must be obtained (5 to 20 minutes after contrast injection)
to allow contrast material to extravasate from the injured collect-
ing system, renal pelvis, or ureter (Brown et al, 1998; Mulligan
et al, 1998; Kawashima et al, 2001). Because ureteral injuries are
often detected late, periureteral urinoma seen on delayed CT scans
may be diagnostic (Gayer et al, 2002).
In reported series, all patients with significant ureteropelvic
laceration, for instance, had either medial extravasation of con-
trast material or nonopacification of the ipsilateral ureter on CT
(Kenney et al, 1987; Kawashima et al, 2001). Such findings should
always raise suspicion for ureteral injury.
Retrograde Ureterography. Retrograde ureterograms, the most
sensitive radiographic test for ureteral injury, are used in some
centers as a primary diagnostic technique to detect acute ureteral
injuries (Campbell et al, 1992); however, the authors tend to use
noninvasive methods such as one-shot IVP and CT scan or to
make the diagnosis intraoperatively when feasible. Retrograde ure-
terography is used, however, to delineate the extent of ureteral
injury seen on CT scan or IVP if further clinical information is
necessary. Retrograde ureterography is most commonly used to
diagnose missed ureteral injuries because it allows the simultane-
ous placement of a ureteral stent if possible.
Antegrade Ureterography. Anterograde ureterography is seldom
used in the authors’ practice. In cases in which ureteral injury is
discovered, we most often plan retrograde ureterography and stent
placement or open repair. If retrograde stent placement is not
possible (usually secondary to a large gap in the two ends of the
transected ureter), the authors use anterograde ureterography and
stent placement at the time of percutaneous nephrostomy place-
ment (Toporoff et al, 1992).
Management (Fig. 42–15)
External Trauma
Contusion
Ureteroureterostomy. Ureteral contusions, although the most
“minor” of ureteral injuries, can heal with stricture or breakdown
later if microvascular injury results in ureteral necrosis, with an
incidence that is not currently known. Severe or large areas of
contusion should be treated with excision of the damaged
area and ureteroureterostomy.
Following certain general principles of ureteral surgery increases
the success rate of this delicate surgery. Repair of the ureter must
be meticulous (Fig. 42–16). Ureteral blood supply is tenuous, and
a sequela of imperfect repair can be urine leakage that can result
in patient debility, nephrectomy, and in rare cases even death.
Principles of management of the injured ureter are as follows:
1. Mobilize the injured ureter carefully, sparing the adventitia
widely, so as not to devascularize the ureter.
Figure 42–15. Suggested management options for ureteral
injuries at different levels.
UPPER
Direct ureteroureterostomy
Transureteroureterostomy
MIDDLE
Direct ureteroureterostomy
Transureteroureterostomy
LOWER
Reimplantation
Psoas hitch
278Urological Trauma
function impairment.
¯ Haematuria is an unreliable indicator.
¯ Extravasation of contrast material in CT is the hallmark
sign of ureteral trauma, and in unclear cases, a retrograde
or antegrade urography is required for confirmation.
Management
¯ Partial injury can be managed with ureteral stenting or
urinary diversion by a nephrostomy.
¯ In complete injuries, ureteral reconstruction following
temporary urinary diversion is required.
¯ The type of repair procedure depends on the site of the
injury (Table 2), and it should follow the principles outlined
in Table 3.
¯ Proximal- and mid-ureteral injuries can often be managed
by primary uretero-ureterostomy, while a distal injury is
often treated with ureteral reimplantation.
Ta b l e 2 : U rete ra l re c o n st r u c t i o n o pt i o n s b y s i te of i n j u r y
Site of injuryReconstruction options
Upper ureterUretero-ureterostomy
Transuretero-ureterostomy
Uretero-calycostomy
Mid ureterUretero-ureterostomy
Transuretero-ureterostomy
Ureteral reimplantation and a Boari flap
Lower ureterUreteral reimplantation
Ureteral reimplantation with a psoas hitch
Complete Ileal interposition graft
Autotransplantation