Bladder calculi formed over a hair nidus in spinal injury cases

Assessment of Bacterial Communities Within the Biofilm of Bladder Calculi in the Neurogenic Bladder Rat Model Following Spinal Cord Injury

Purpose: To develop a rat model of bladder calculi in the neurogenic bladder following spinal cord injury (SCI) and assess bacterial communities within the biofilm of bladder calculi using denaturing gradient gel electrophoresis (DGGE).Methods: The silk tied to a small segment of the Teflon IV catheter was implanted through the urethra into the bladder of rats with SCI induced by T9 laminectomy. After 6 months, the rats were sacrificed and their bladder calculi were collected by opening the bladders through the low-midline incision. Genomic DNA was extracted from the biofilm of bladder calculi followed by DGGE to obtain bacterial DNA. The DNA sequences were compared and analyzed using BLAST (Basic Local Alignment Search Tool) to identify bacteria.Results: After placing silk nidus in the bladder for 6 months, all 6 rats developed bladder calculi. According to DGGE analysis, Pseudomonas aeruginosa was the most dominant strain, while Clostridium sp. and Lactobacillus sp. were relatively dominant strains within the biofilm of bladder calculi in the rats with SCI.Conclusions: DGGE analysis showed various microorganisms in the biofilm of calculi arising from a neurogenic bladder rat model. This research design can be the basis for clinical studies and may be applied to calculi in patients with neurogenic bladder following SCI.

Ultrasonographic diagnosis of a hair foreign body in the urinary bladder of a dog

A 13-year-old male neutered mixed-breed dog with a history of gallbladder mucocele and urolithiasis was evaluated by ultrasound. Two hyperechoic, linear foreign bodies with no distal acoustic shadowing were detected in the urinary bladder and urethra. Following the ultrasound examination, the patient underwent cystoscopy, and two single hairs were found and successfully retrieved. Considering that urinary bladder foreign bodies may be a source for urinary tract infection and can act as a nidus for urocystolith formation, removal is recommended. This is the first published report describing ultrasonographic diagnosis of a hair foreign body in the canine urinary bladder and urethra.

Unexpected foreign body in the bladder of a spinal cord injured patient: A case report

Context: Bladder dysfunction is common in patients with spinal cord injuries. Clean intermittent catheterization is a preferred method of neurogenic bladder management among spinal cord injured patients. Some complications may occur due to the use of clean intermittent catheterization.Findings: In this report, we presented a case with an unexpected foreign body detected in the bladder of a patient who used to perform clean intermittent catheterization for her neurogenic bladder management, to our knowledge, which has not been reported in the literature so far.Conclusion/Clinical Relevance: In this case report, we want to emphasis the importance of different kind of foreign bodies remaining in the bladder during clean intermittent catheterization.

Adult Neurogenic Lower Urinary Tract Dysfunction and Intermittent Catheterisation in a Community Setting: Risk Factors Model for Urinary Tract Infections

A risk factor model for urinary tract infections in patients with adult neurogenic lower urinary tract dysfunction performing clean intermittent catheterisation was developed; it consists of four domains, namely, (1) general (systemic) conditions in the patient, (2) individual urinary tract conditions in the patient, (3) routine aspects related to the patient, and (4) factors related to intermittent catheters per se. The conceptual model primarily concerns patients with spinal cord injury, spina bifida, multiple sclerosis, or cauda equina where intermittent catheterisation is a normal part of the bladder management. On basis of several literature searches and author consensus in case of lacking evidence, the model intends to provide an overview of the risk factors involved in urinary tract infections, with specific emphasis to describe those that in daily practice can be handled and modified by the clinician and so come to the benefit of the individual catheter user in terms of fewer urinary tract infections.

Comparison of biochemical parameters of blood and urine in spinal cord injury patients and association with urinary stone formation

OBJECTIVE

The aim of this study was to compare the biochemical parameters of the urine and blood in spinal cord injury (SCI) patients and healthy subjects.

METHODS

Thirty male patients with SCI were enrolled. Biochemical features of the urine and blood of the SCI patients were compared to healthy subjects. Extracted stones were analyzed by X-ray diffraction.

RESULTS

A total of 30 patients with SCI (mean age of 28.77 ± 7.3 years) and 10 healthy subjects (mean age of 27.6 + 6.2 years) were included. Among the patients with SCI; 12 of them (40%) had urinary stones and 18 of them (60%) did not. Urinary stone was localized in the kidneys and bladder in 25% and 75% of the subjects, respectively. The mean duration of cord injury at diagnosis of urinary stone was 9.2 ± 6 months. Urine cultures obtained on admission were negative for the control group, while the microorganism isolation rate was 73.3% in the SCI group. The urinary excretion of citrate and Mg were lower in the patient group compared with control group (p= 0.008, p= 0.001, respectively). As for the diffraction analysis of eight stones; five (62.5%) of the stones were calcium oxalate, two (25%) of them were calcium phosphate, and one (12.5%) was magnesium ammonium phosphate.

CONCLUSION

Both infection and metabolic changes play an important role in stones formation in SCI patients. The urinary excretion of citrate and Mg was decreased and urinary PH was increased in SCI patients.

"Hair in the Bladder": An Unusual Finding

Trichobezoar is a rare condition whereby a hairball is found in the human stomach or gastrointestinal tract, most frequently in young women, mainly in association with a psychiatric disorder. Trichobezoar cases have also been reported in the bladder and represent a rare complication of foreign bodies, called “hair nidus or hair ball,” in patients with chronic catheter. Approximately 10% to 15% of patients on long-term urethral catheter or clean intermittent self-catheterization develop urinary tract stones. In a small minority of cases, bladder stones can develop around a foreign body that was introduced into the bladder. In the literature, there are few cases of foreign bladder bodies that formed stones over a hair nidus. Recognizing this condition can optimize the patient's quality of life. Herein, we present a case of a 71-year-old Caucasian male with a long-term catheter in hypocontractile urinary bladder secondary to injury of pelvic plexus after rectal surgery. He had a bladder stone caused by hair encrusted together. Hair is introduced into the bladder either by adherence to the catheter directly or by overlying the urethral meatus and being pushed internally. Regular hygiene and shaving of pubic area represent effective preventive measures to reduce this kind of complications in patients with chronic indwelling catheter or under a self-catheterization regimen.

Intermittent self-catheterisation in women: reducing the risk of UTIs

Intermittent self-catheterisation (ISC) is the insertion and removal of a catheter to drain the bladder and is a safe and effective way to preserve renal function. It can be used as a one-off intervention to drain urine post-operatively or to measure residual urine volumes if a bladder scanner is unavailable. ISC can also be used as a long-term option to manage bladder dysfunction, and for some provides an excellent option to maintain independence and improve quality of life. Urinary tract infections are a common complication for women undertaking ISC. This article explores the prevention of urinary tract infections in women undertaking long-term ISC for the management of bladder dysfunction.