Tetra-NIRS Clinical Study


Laborie Medical Technologies

Status and phase

Phase 4


Lower Urinary Tract Symptoms
Overactive Bladder


Device: Urodynamics + TETRA - NIRS

Study type


Funder types




Details and patient eligibility


The purpose of this evaluation is to validate the previous clinical study results using a Near-Infrared Spectroscopy (NIRS) device, as compared to the conventional urodynamics (UDS) testing. The experiment will use the commercially available Tetra-NIRS and Laborie UDS equipment. The hypothesis is that the Tetra-NIRS device, in the clinical environment, provides data to enhance the analysis using the standard urodynamics equipment (stand-alone Urodynamic procedure).

Full description

This is a study of the commercially available Tetra-NIRS device to compare the results collected against conventional urodynamics. The study will evaluate male patients with lower urinary tract symptoms (LUTS) as well as female subjects with over-active bladder (OAB). The Tetra-NIRS unit uses near infrared light at 3 different wavelengths to measure changes in haemoglobin and cytochrome from the detrusor muscle from the human bladder wall. This process is similar to what is used for cerebral and muscle oxygenation monitoring (e.g., pulse oximetry). Previous clinical feasibility studies have identified the correlation between the changes in haemoglobin and cytochrome of the bladder, and bladder pressure values obtained during urodynamics procedures and uroflow procedures. For this study the Tetra-NIRS results will not be used by the urologist/nurse to guide in patient management and treatment decisions, but rather will only be used to collect measurements from the patient for the purposes of this study. The Tetra-NIRS sensor patch will be adhered externally to the skin surface where the bladder is located. For this study, a minimum of 30 male subjects with LUTS and 30 female subjects with OAB scheduled to undergo a urodynamics procedure are to be enrolled. Up to 20 female subjects with OAB will be enrolled. The investigators will attempt to equally enrol male subjects into each of the two categories including obstructed and non-obstructed groups according to prostate hyperplasia (equivocal subjects will be determined by the investigator).


155 patients




18+ years old


No Healthy Volunteers

Inclusion criteria

  • The selection of subjects enrolled for testing must meet the following criteria:

    • Subjects must be 18 years of age or older.
    • Subjects are patients of one of the institutions and are currently scheduled for UDS
    • Male subjects must have LUTS
    • Female subjects must have OAB
    • Subjects must give their informed consent prior to enrolment.

Exclusion criteria

  • The patient has an existing health condition which the investigators feel will not allow for safe or accurate measurements with the Tetra-NIRS device.

Trial design

Primary purpose




Interventional model

Single Group Assignment


None (Open label)

155 participants in 1 patient group

Urodynamics + Tetra
Experimental group
All patients were recruited to the same arm and receive Urodynamics testing as part of the routine diagnostic work-up, plus the Tetra-NIRS intervention.
Device: Urodynamics + TETRA - NIRS

Trial contacts and locations



Data sourced from clinicaltrials.gov

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