B1 Wearable Bladder Volume Monitor
B1 body-worn wireless bladder monitor: three probes scan the bladder and fuse images into a 3D view, measuring volume continuously and alarming.
- Brand: SonoStar
- Price: On request
- Probe frequency: See specifications
- Connection: Wireless - built-in WiFi transmits the images
- Charging: Wired charging
- Category: Wearable Ultrasound
Product overview
The B1 measures bladder volume automatically and continuously. For a patient with incontinence, where urine is passed involuntarily once the bladder is full, it warns the patient as the bladder approaches fullness, so urine can be passed in time and clothing stays dry. For a patient who no longer feels bladder filling, it warns when the bladder is full, so urine is passed in time instead of the bladder becoming over-distended. Elderly patients, critically ill patients and patients after surgery or anaesthesia are the usual users.
For nursing staff it removes the need to measure urine by hand at frequent intervals. When several patients are being cared for there is no need to walk round to check each one: the phone links to the workstation and alarms from several patients arrive at the same time, which cuts the workload considerably.
Maximum detection depth 300 mm. Body 60 mm x 50 mm x 20 mm, weight 45 g.
The data on this page is taken from the product technical documentation; where it has been updated, the latest version applies.
Technical specifications
Specifications
How it works
- Three multi-element phased-array probes on the underside of the device scan the bladder from different angles.
- The images are fused into a three-dimensional view, and bladder volume is calculated from it.
How to use
- Place the B1 on the lower abdomen and pair it with a phone over Bluetooth.
- Set the volume threshold for the alarm.
- The device scans the bladder continuously and calculates the volume automatically.
- When the volume passes the threshold a buzzer sounds; if a phone is paired, the full-bladder alarm is also sent to the phone.
Product features
| Feature | Detail |
|---|---|
| Compact and light | Matchbox-sized, 45 g - barely noticeable when worn |
| Simple to use | Straightforward operation; monitoring is automatic and continuous, so no frequent manual steps are needed |
| All-day monitoring | Up to 26 hours of battery life covers a full day of use |
| High accuracy | Volume is calculated from the fused 3D image, and measurement does not depend on the patient's position |
Technical data
| Item | Data |
|---|---|
| Signal processing channels | Medical version 32 channels, home version 16 channels |
| Dimensions | 60 mm x 50 mm x 20 mm |
| Weight | 45 g |
| Battery life | About 26 hours |
| Charging time | 4 hours |
| Monitoring depth | 300 mm |
| Volume range | 10-2000 ml |
Specifications updated 2026-11-01
Typical applications
The application scenarios on this page describe the device based on its technical data and configuration. The actual scope of application is the one stated in the product registration certificate. Follow your institution's procedures and the instructions for use.
| Setting / department | Typical use | Configuration note |
|---|---|---|
| Nursing and ICU | Real-time volume monitoring for patients with an indwelling catheter | Worn on the body, automatic and continuous |
| Elderly, post-operative and post-anaesthesia care | Volume monitoring and alerts where incontinence or retention is a risk | Alarms can be sent to a central workstation |
| Rehabilitation and long-term care | Observation of voiding function and support for nursing care | Continuous monitoring |
Usage and selection notes
The B1 is a body-worn monitoring device.
The actual scope of application is the one stated in the product registration certificate. Please confirm the model and configuration with our product department.
For contraindications and precautions, refer to the instructions for use. The device must be operated by a licensed physician with the relevant qualifications.
The technical data on this page is taken from the product technical documentation; where it has been updated, the latest version applies. The listed departments and application scenarios describe the device based on its technical data, and the actual scope of application is the one stated in the product registration certificate. This page makes no claim about clinical outcome and does not constitute clinical guidance.
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