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Lesion vesical iatrogenica: experiencia de diez anos, tratamiento y resultados entre 1999-2009, Kuala Lumpur, Malasia.

Iatrogenic bladder injury: a single institution's ten-year experience in treatment and outcome 1999-2009, Kuala Lumpur, Malaysia.

Iatrogenic bladder injuries are an occasional complication of surgery performed in the pelvis. Anatomically, the bladder lies in close proximity to the rectum in men and to the uterus in women; thus there is potential for iatrogenic injury occurring during surgical dissection of the aforementioned structures. We present here our single institution's experience in dealing with iatrogenic bladder injury over a ten-year period.

MATERIALS AND METHODS

This is a retrospective review of all iatrogenic bladder injuries treated by our unit in our institution over the last ten years. The case notes were retrieved from the records office and the pertinent information was recorded onto a spreadsheet. Patients or their next of kin were contacted via phone to determine their current status if the patients were no longer on regular follow-up. Variables such as gender, age at the time of injury, and site of injury were recorded, as well as information about the indication for surgery, type of surgery performed, location of injury, when the injury was identified, method of repair and outcome of repair. Patients who sustained bladder injuries due to non-surgical reasons (such as traumatic bladder injuries due to pelvic fractures, blunt trauma or penetrating injuries to the pelvis) were excluded.

RESULTS

There were a total of 12 iatrogenic bladder injuries. Nine injuries occurred in female patients, while three injuries occurred in males. Table I shows the number of bladder injuries in relation to surgery performed, as well as the location of the injury. Eight injuries occurred during gynaecological surgery with five injuries occurring during lower segment caesarean section (LSCS), two injuries during total abdominal hysterectomy and bilateral salpingo-oopherectomy (TAHBSO), and one injury due to Burch colposuspension. Among the patients who sustained injury during caesarean section, four of these patients had previously undergone caesarean sections, while only one patient had no prior history of surgery.

Of the remaining four non-gynaecological surgery related injuries, two injuries occurred during open hernioplasty and one during exploration of an enterocutaneous fistula and the last during insertion of a suprapubic port for a laparoscopic appendicectomy. All injuries were referred to and repaired by the urology team upon diagnosis.

Eleven of the injuries were diagnosed intraoperatively. Only one case was diagnosed postoperatively via cystography after exploration of an enterocutaneous fistula. Post-operatively the patient was noted to have haematuria with rising serum creatinine levels with unilateral hydronephrosis on ultrasound. Cystography showed extraperitoneal extravasation of contrast, while retrograde pyelography showed a concurrent urethral injury causing the unilateral hydronephrosis. Repair of the bladder was performed together with repair of the urether, which was re-implanted by using a Boari flap.

Five injuries involved the dome of the bladder, three injuries occurred at the posterior wall, and four injuries occurred at the lateral wall of the bladder. Eight of the injuries were intraperitoneal, while the remaining four were extraperitoneal. All injuries were repaired primarily with absorbable sutures using the two-layer suture technique of the bladder wall with perivesical drainage.

Drainage of the bladder post repair was performed via a urethral catheter (Foley's catheter) for a minimum of ten days, which was removed only after cystography confirmed there was no urinary leak. Patients were then followed up with repeat retrograde cystography six months later and if normal, were discharged.

Ten patients were successfully treated with no complications and have remained well. One patient passed away due to unrelated causes. Another one, with a posterior wall intraperitoneal injury during LSCS, needed to be on catheter for three months due to persistent bladder leak. Her urine culture showed Escherichia coli infection, which was sensitive to cefuroxime. She was put on prolonged antibiotics. A repeat cystogram and urine culture at three months showed that the bladder had healed completely without any contrast extravasation and there was no more urinary infection. The catheter was removed and she has remained well at six months of follow up.

DISCUSSION

Bladder injury is a known complication of caesarean section and its incidence is reported at about 0.1 in 1000 births (1). However, the risk is higher among patients who have undergone previous caesarean sections and present in labour necessitating emergency caesarean sections. Makoha et al. (2), reported significantly higher risk of bladder injuries among patients with multiple caesarean sections due to the presence of intraperitoneal adhesions from previous surgery. Almost half of the iatrogenic bladder injuries in our series occurred during lower segment caesarean sections and all five caesarean sections were performed as emergencies. Furthermore, four of the five patients who sustained bladder injury during caesarean section had also previously undergone two or more caesarean sections prior to injury. Previous caesarean section is known to significantly increase the risk of iatrogenic bladder injury (1-3).

Extraperitoneal injuries due to trauma can be safely treated non-surgically with just continuous bladder drainage (4). Such injuries often result in retroperitoneal and scrotal urine extravasation but do not cause problems such as peritonitis, which is seen in intraperitoneal injuries. However, iatrogenic bladder injuries, which occur during surgery opens up a potential space for continued urine leak and fistula. All four extraperitoneal injuries in our series were surgically repaired as three injuries were detected intra-operatively, while the other was diagnosed later with a concurrent urethral injury requiring surgical intervention. The bladder injury repair was undertaken during reimplantation of the ureter. Despite the delayed diagnosis, the repair was a success with no complications two years later.

Surgical repair in this series utilized the continuous two-layered suturing method without difficulty. All patients, regardless of site of injury, were successfully repaired without any complications. All patients underwent cystography 10 days post repair and were followed up for at least 18 months before being discharged without further surveillance. In our experience, bladder repair is often successful with meticulous technique and proper debridement of the ragged wound edge to recreate a clean surgical wound edge for approximation and suturing.

Prompt diagnosis of iatrogenic injury and almost immediate repair in 11 out of 12 cases in this series is likely to have contributed to the good outcome seen in this series. It is well documented that early diagnosis and repair offers the best outcomes in the management of iatrogenic bladder injuries (1,5). Delayed diagnosis often leads to the development of local infection, which usually progresses to sepsis; thereby, complicating repair, impairing wound healing, and producing poor outcomes.

Ascending cystography with a minimum of 300 ml of contrast insufflated into the bladder with two views followed by a post voiding film is adequate for the diagnosis of bladder injury and it provides all the anatomic details required for assessment and follow up. Ascending cystography was also advocated by Dobrowolski in his large series (6). Continuous bladder drainage should be continued from repair until cystography confirms the integrity of the bladder repair. Perivesical drainage is recommended but should be removed after 48 hours post-operatively unless there is bleeding or extravasation of urine, which suggests an imperfect repair.

CONCLUSION

Prevention remains the best management of iatrogenic bladder injury. The risk of injury should be anticipated in patients undergoing emergency caesarean section who have prior history of multiple previous caesarean sections. Necessary precautions such as bladder decompression preoperatively and careful, meticulous dissection is important in reducing the risk. Of equal importance is for the surgeon to be alert and able to identify injury intra-operatively to facilitate immediate repair and achieve the best outcome.

Conflict of interest. None of the authors has conflicts of interest related to this study.

REFERENCES

(1.) Rajasekar D, Hall M. Urinary tract injuries during obstetric intervention. Br J Obstet Gynaecol. 1997; 104: 731-4.

(2.) Makoha FW, Felimban HM, Fathuddien MA, Roomi F, Ghabra T. Multiple cesarean section morbidity. Int J Gynaecol Obstet. 2004; 125: 50-3.

(3.) Rahman MS, Gasem T, Suleiman SA, Jama FEA, Burshaid S. Bladder injuries during caesarean section in a University Hospital: A 25-year review. Arch Gynecol Obstet. 2009; 279: 349-52.

(4.) Lynch TH, Martinez-Pineiro L, Plas Eugen, Serafetinides E, Turkeri L. EAU guidelines on urological trauma. Eur Urol. 2005; 47: 1-15.

(5.) Gomez RG, Ceballos L, Coburn M, Corriere JN, Dixon CM. Consensus on genitourinary trauma; Consensus statement on bladder injuries. Br J Urol. 2004; 94: 27-32.

(6.) Dobrowolski ZF, Lipczynski W, Drewniak T, Jakubik P, Kusionowicz J. External and iatrogenic trauma of urinary bladder: A survey in Poland. Br J Urol. 2002; 89: 755-6.

Christopher CK Ho, MD [1], Hans Alexander, MD [2], Praveen Singam, MD [1], Lee Boon Cheok, MD [3], Zulkifli MD Zainuddin, MD [4]

[1.] Lecturer/Surgeon, Urology Unit, Department of Surgery, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia. e-mail: chrisckho2002@yahoo.com

[2.] Medical Officer, Urology Unit, Department of Surgery, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia.

[3.] Senior Lecturer/Consultant Urologist, Urology Unit, Department of Surgery, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia.

[4.] Associate Professor/Consultant Urologist, Urology Unit, Department of Surgery, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia.

Received for publication April 20, 2010

Accepted for publication October 19, 2010
Table 1
Summary of iatrogenic bladder injury

Type of            Indication            No of    Extraperitoneal/
surgery                                  cases    intraperitoneal

LSCS               In labour with 2or
                   more previous
                   LSCS                    3      Intraperitoneal
                   Placenta accreta        1      Intraperitoneal
                   Cephalopelvic
                   disproportion                  Intraperitoneal
TAHBSO             Uterine fibroid         1      Intraperitoneal
                   Endometriosis
                   and fibroid             1      Intraperitoneal
Bursch
Colposuspension                                   Extraperitoneal
Exploration of
enterocutaneous
fistula                                    1      Extraperitoneal
Hernioplasty                                      Extraperitoneal
Laparoscopic                               1      Intraperitoneal
appendicectomy

Type of            Indication            Location of injury
surgery

LSCS               In labour with 2or    Bladder dome
                   more previous         (2 cases)
                   LSCS                  Posterior bladderwall
                   Placenta accreta      Posterior bladderwall
                   Cephalopelvic
                   disproportion         Bladder dome
TAHBSO             Uterine fibroid       Bladder dome
                   Endometriosis
                   and fibroid           Posterior bladderwall
Bursch
Colposuspension                          Lateral bladder wall
Exploration of
enterocutaneous
fistula                                  Lateral bladder wall
Hernioplasty                             Lateral bladder wall
Laparoscopic                             Bladder dome
appendicectomy

LSCS: Lower Segment Caesarian Section; TAHBSO: Transabdominal
Hysterectomy and Bilateral Oophorectomy
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Article Details
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Author:Ho, Christopher C.K.; Alexander, Hans; Singam, Praveen; Cheok, Lee Boon; Zainuddin, Zulkifli M.D.
Publication:Colombia Medica
Article Type:Report
Date:Apr 1, 2011
Words:1632
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