Clinical Outcomes and Risk Factor Analysis of Patients Presenting with Emphysematous Cystitis: A 15-Year Retrospective Multicenter Study

"Beyond the Bladder: Exploring the Intricacies of Emphysematous Cystitis and Its Surprising Associations"

Emphysematous cystitis is defined by the presence of air within the bladder wall or lumen in imaging studies with increased incidence in elderly women and diabetics. It is a result of gas-forming organisms like Klebsiella and E. coli but can be caused by fungi such as Candida and Aspergillus as well with a wide spectrum of clinical presentations. In this article, we present a case of a 77-year-old female with diabetes mellitus who presented to the hospital with a chief complaint of left lower quadrant abdominal pain. Abdominal imaging revealed emphysematous cystitis, paraspinal abscess, and air in the thoracic and lumbar vertebrae. Laboratory results showed leukocytosis, lactic acidosis, and urinalysis significant for urinary tract infection but no positive urine or blood cultures. The patient was admitted to the intensive care unit for septic shock and was treated with mechanical ventilation, vasopressor support, and prompt antimicrobial therapy following which the requirement of vasopressors ceased on the third day of admission. The decision was then made by the family to pursue hospice care, following which mechanical ventilation was discontinued and the patient transferred to inpatient hospice. With this case report, we aim to add to the existing literature regarding the spread of intra-abdominal infections and go over a brief review of the currently available literature. From our review, we would like to conclude that the presence of pneumoracchis, especially in the setting of an intra-abdominal infection, is a poor prognostic marker, and timely diagnosis and treatment of potential causes are required to reduce mortality.

Scoring Systems to Evaluate the Mortality Risk of Patients with Emphysematous Cystitis: A Retrospective Observational Study

BACKGROUND

Emphysematous cystitis (EC) is a complicated urinary tract infection (UTI) characterized by gas formation within the bladder wall and lumen. Immunocompetent people are less likely to suffer from complicated UTIs, but EC usually occurs in women with poorly controlled diabetes mellitus (DM). Other risk factors of EC include recurrent UTI, neurogenic bladder disorder, blood supply disorders, and prolonged catheterization, but DM is still the most important of all aspects. Our study investigated clinical scores in predicting clinical outcomes of patients with EC. Our analysis is unique in predicting EC clinical outcomes by using scoring system performance.

MATERIALS AND METHODS

We retrospectively collected EC patient data from the electronic clinical database of Taichung Veterans General Hospital between January 2007 and December 2020. Urinary cultures and computerized tomography confirmed EC. In addition, we investigated the demographics, clinical characteristics, and laboratory data for analysis. Finally, we used a variety of clinical scoring systems as a predictor of clinical outcomes.

RESULTS

A total of 35 patients had confirmed EC, including 11 males (31.4%) and 24 females (68.6%), with a mean age of 69.1 ± 11.4 years. Their hospital stay averaged 19.9 ± 15.5 days. The in-hospital mortality rate was 22.9%. The Mortality in Emergency Department Sepsis (MEDS) score was 5.4 ± 4.7 for survivors and 11.8 ± 5.3 for non-survivors (p = 0.005). For mortality risk prediction, the AUC of ROC was 0.819 for MEDS and 0.685 for Rapid Emergency Medicine Score (REMS). The hazard ratio of univariate and multivariate logistic regression analyses of REMS for EC patients was1.457 (p = 0.011) and 1.374 (p = 0.025), respectively.

CONCLUSION

Physicians must pay attention to high-risk patients according to clinical clues and arrange imaging studies as soon as possible to confirm the diagnosis of EC. MEDS and REMS are helpful for clinical staff in predicting the clinical outcome of EC patients. If EC patients feature higher scores of MEDS (≥12) and REMS (≥10), they will have higher mortality.