Demonstrated effectiveness against retrograde infections.*,1,2,3

UnoMeter™ Safeti™ Plus

Hourly Diuresis Monitoring System


* As demonstrated in vitro

Infection Prevention

Protecting patients at risk by reducing the risk of retrograde infection. In vitro proven effectiveness against retrograde infection.1,2

Optimized Nursing

Intuitive product design with features that help to save nursing time and provide caregivers with the confidence of reliable urine measurement.

For All Patients

Designed to provide accurate urine measurement for all patients, even for low volumes, during transportation, and for various bed types at different wards.


The Risk of Catheter Associated Urinary Tract Infections (CAUTI)

Monitoring hourly diuresis is essential for detecting impaired fluid balance, renal insufficiency, or possible infections of critically ill patients. While it is important to perform, catheter-based urine measurement can lead to CAUTI and additional treatment complications.

Prevalence of CAUTI

CAUTIs are the most common nosocomial infections in hospitals and nursing homes, accounting for >40% of all institutionally acquired infections.4

In the intensive care unit (ICU), patients are at a high risk for developing CAUTI due to the frequent use of indwelling catheters.5 In the ICU, 95% of all urinary catheters are CAUTIs.6 Due to their prevalene and despite existing measures to reduce the incidence of CAUTI, they are still considered the second most important healthcare-associated infection in critically ill patients. 6

Pathogenesis of CAUTI

CAUTI develop in up to 25% of patients requiring urinary catheters for ≥ 7 days.4 While most micro-organisms causing endemic CAUTI derive from the extra-luminal route, a significant percentage (30-40%) of catheter infections derive from the intra-luminal route. Intra-luminal contamination can be caused due to a reflux of microorganisms that have entered the catheter lumen or contaminated urine in the collection bag. 4

Complications caused by CAUTI

CAUTIs are posing a serious threat to patients. They can lead to an increased length of stay and complications, such as sepsis and endocarditis,8 and are associated with increased morbidity and economic consequences.6 Estimated 13000 deaths are associated with UTIs in the US annually.8

CAUTI is a hospital acquired condition and results in non-payment.9

CAUTI-associated complications can result in:

  • Patient discomfort13
  • Increased morbidity and mortality10
  • Length of hospital stay increased by 2-4 days10
  • Excess healthcare costs10



UnoMeter™ Safeti™ Plus Diuresis Monitoring System

Demonstrated effectiveness against retrograde infection*, 1,2

In vitro proven containment of contamination within the collection bag1,2,3

In vitro study results have demonstrated that UnoMeter™ Safeti™ Plus helps to prevent retrograde infection more effectively than traditional urine measuring devices with a front-mounted chamber.*, 1,2,3

Top mounted systems, such as the UnoMeter™ Safeti™ Plus have been found to be more effective in preventing ascending contamination than systems that require tilting to empty the monitoring chamber, which may potentially cause contact of contaminated urine with the tube inlet.1

An in vitro study compared the UnoMeter™ Safeti™ Plus and two front-mounted devices in preventing bacterial migration from the collection bag to the measuring chamber or catheter in a simulated bladder model.2

After 7 days, only UnoMeter™ Safeti™ Plus showed no progression of the bacteria from bag to the measuring chamber. In both front-mounted devices, contamination progressed into the measuring chamber.

Percentage of Samples with Bacteria Growth

  After 2 days After 4 days After 7 days
Urine meter 1 75% 100% 100%
Urine meter 2 100% 100% 100%
UnoMeter™ Safeti™ Plus 0% 0% 0%

2009 in vitro study: Four samples were tested for each device and taken at set time intervals to show whether there was bacteria growth (n=4)

The study results demonstrated that the UnoMeter™ Safeti™ Plus contains contamination within the collection bag and does not allow bacterial migration to the measuring chamber or catheter.2

*As demonstrated in vitro.

Discover the benefits of UnoMeter™ Safeti™ Plus

UnoMeter™ Safeti™ Plus helps to prevent retrograde infection*,1,2

In vitro study results have demonstrated that the UnoMeter™ Safeti™ Plus contains contamination within the collection bag and does not allow bacterial migration to the measuring chamber or catheter.*,1,2

The design of UnoMeter™ Safeti™ Plus with the top-mounted chamber and 2 non-return valves helps to minimize the risk of retrograde infection.1

The study results have shown that UnoMeter™ Safeti™ Plus helps to prevent retrograde infection more effectively than competitor devices with a traditional front-mounted chamber.2

* As demonstrated in vitro

Close Double lumen tube helps to minimize urine stasis
Close Sample port with documented prevention of bacterial transmission*,11
Close Non-return-valve in connector, helping to eliminate the risk of urine back flow into bladde
Close Anti-kink spiral helps to minimize urine stasis
Close Top-mounted drip chamber design helps to reduce the risk of retrograde infection1
Close Non-return-valve in collection bag, helping to prevent urine backflow to the chamber
Close Compact system helps to minimize risk of floor contamination

UnoMeter™ Safeti™ Plus has been designed to save nursing time and provide caregivers with the confidence of reliable urine measurement.

The system has been developed with features to allow caregivers to spend less time with handling the product and more time to focus on the patient.

UnoMeter™ Safeti™ Plus offers the unique Kombikon™ Sample Port with a transparent window for observation of urine build up, an intuitive open and close handling system for emptying the chamber with one hand and convenient and flexible hanging options.

Close Kombikon™ Sample Port (needle-free) with transparent window allows for observation of urine build up before sample taking
Close Easy-to-operate bottom outlet
Close Large digits on chamber for easy, accurate measurement
Close Intuitive open / close handle - One handed operation allows urine to be emptied into the collection bag by simply turning the lever on top of the monitoring chamber
Close Convenient and flexible hanging options for fixation to bed

UnoMeter™ Safeti™ Plus is designed to provide accurate urine measurement for all patients, during transportation, and for various bed types at different wards.

The measuring chamber has a detailed graduation that allows for accurate measurements even for patients with Oliguria and paediatric patients.

The Kombikon™ sample port allows for sampling of patient urine, even for low volumes. The transparent window on the front side allows for observation of urine build up when clamping the system with a tube clamp.

UnoMeter™ Safeti™ Plus can be transported even while connected.

Close Collect urine samples even from patients with low diuresis/oliguria (Tube clamp facilitates urine build-up at sample port)
Close The connector is compatible with all Foley catheters* *Foley catheters meeting requirements of ISO 20696:2018
Close The Kombikon™ sample port with observation window for urine build up allows for sampling, even with low urine output.
Close Can be transported face up when patients are moved without risk of losing measurement
Close Small chamber allows for accurate measurement even at low volumes12
Close Flexible hanging options allow for quick attachment to various bed types

For product catalogue please click here.

Essential Resources

Select documents to download, or click to open PDF.

UnoMeter™ Safeti™ Plus Brochure (Fixed Bag)

UnoMeter™ Safeti™ Plus Brochure (Change Bag)

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* As demonstrated in vitro

  1. Frimodt-Møller N, Corneliussen L. In vitro test of different urine-meters in an experimental bladder-drainage model: prevention of ascending contamination depends on construction of the urine meter. British J of Infect Control 2005;6(5):14-17
  2. Ashman P, SMTL Closed System Study Test Report, 2009, Data on file, ConvaTec Inc.
  3. Frimodt-Møller N, Corneliussen L. In vitro test of ascending contamination in different urine meter systems. Test Report: December 2011, data on file, ConvaTec.
  4. Maki DG, Tambyah PA; Engineering out the risk of Infection with Urinary Catheters. Emerging Infectious Diseases: Vol. 7, no. 2, March-April 2001.
  5. Marra, A. R., Sampaio Camargo, T. Z., Gonçalves, P., Sogayar, A. M., Moura, D. F., Jr, Guastelli, L. R., Alves Rosa, C. A., da Silva Victor, E., Pavão Dos Santos, O. F., & Edmond, M. B. (2011). Preventing catheter-associated urinary tract infection in the zero-tolerance era. American journal of infection control, 39(10), 817–822.
  6. Aubron, C., Suzuki, S., Glassford, N. J., Garcia-Alvarez, M., Howden, B. P., & Bellomo, R. (2015). The epidemiology of bacteriuria and candiduria in critically ill patients. Epidemiology and infection, 143(3), 653–662. Accessed on 14/2/2021.
  7. Scott RD. The Direct Medical Costs of Healthcare-Associated Infection in US Hospitals and Benefits of Prevention. Centers for Disease Control and Prevention. March 2009. Page 12, Table 3. Accessed February 16, 2021.
  8. Letica-Kriegel AS, Salmasian H, Vawdrey DK, et al Identifying the risk factors for catheter-associated urinary tract infections: a large cross-sectional study of six hospitals. BMJ Open 2019;9:e022137. doi: 10.1136/bmjopen-2018-022137.
  9. Centers for Medicare and Medicaid Services, Accessed 17/02/21
  10. Centers for Disease Control and Prevention. Background: Impact of CAUTI, HYPERLINK "" Accessed 17/02/21.
  11. Ashman P, Investigation of Microbial Barrier Properties of Urine Bag Sampling Ports. Test Report, March 2015, Data on file, ConvaTec.
  12. Price, L., UnoMeter Safeti Plus measuring accuracy testing (WHRI3693 TA263) , Test Report, October 29, 2012, Data on file, ConvaTec.
  13. Parker, V., Giles, M., Graham, L. et al. Avoiding inappropriate urinary catheter use and catheter-associated urinary tract infection (CAUTI): a pre-post control intervention study. BMC Health Serv Res 17, 314 (2017). Accessed 17.03.2021.

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