# Respiratory bi-directional pressure and flow data collection device with auxiliary thoracic and abdominal circumferential monitoring

> Venturi device for bidirectional flow measurement in series with ventilator circuitry. Secondary measurement of the change in circumference of both abdomen and chest during breathing using a rotary encoder based tape measure.

**Wikidata**: [Q136094528](https://www.wikidata.org/wiki/Q136094528)  
**Source**: https://4ort.xyz/entity/respiratory-bi-directional-pressure-and-flow-data-collection-device-with-auxiliary-thoracic-and-abdominal-circumferentia

## Summary
The Respiratory bi-directional pressure and flow data collection device with auxiliary thoracic and abdominal circumferential monitoring is an open hardware device that measures bidirectional flow in ventilator circuits using a Venturi mechanism, while simultaneously tracking chest and abdominal circumference changes via rotary encoder-based tape measures.

## Key Facts
- OSHWA UID: nz000002  
- Instance of: open hardware  
- Contains a Venturi device for bidirectional flow measurement in series with ventilator circuitry  
- Incorporates rotary encoder-based tape measures for chest circumference monitoring during breathing  
- Incorporates rotary encoder-based tape measures for abdominal circumference monitoring during breathing  
- Classified as open hardware with freely accessible and modifiable design documents  

## FAQs
### Q: What is the primary measurement capability of this device?  
A: It measures bidirectional flow in ventilator circuits using a Venturi device and simultaneously tracks changes in chest and abdominal circumference during breathing.  

### Q: How does the device measure thoracic and abdominal movement?  
A: It uses rotary encoder-based tape measures to detect changes in both chest and abdominal circumference during the breathing cycle.  

### Q: Is this device open source?  
A: Yes, it is classified as open hardware, meaning its design documents are publicly accessible and modifiable by others.  

## Why It Matters
This device addresses critical gaps in respiratory monitoring by integrating flow/pressure data with thoracoabdominal movement metrics. Its Venturi-based bidirectional flow measurement provides precise ventilatory dynamics, while the auxiliary circumferential monitoring reveals diaphragmatic effort and potential patient-ventilator asynchrony. As open hardware (OSHWA UID: nz000002), it democratizes access to advanced respiratory monitoring technology, enabling low-cost customization for research and clinical settings. This dual-measurement approach offers a more holistic view of respiratory mechanics compared to single-parameter devices, potentially improving ventilator titration outcomes and reducing healthcare costs in resource-constrained environments.

## Notable For
- Combining ventilator-integrated Venturi flow measurement with simultaneous chest and abdominal circumference tracking  
- Utilizing rotary encoder technology for non-invasive respiratory movement monitoring  
- Being certified open hardware with OSHWA UID nz000002  
- Providing a unified system for both flow dynamics and thoracoabdominal synchrony assessment  

## Body  
### Device Functionality  
- Measures bidirectional airflow pressure and flow via a Venturi device installed in series with ventilator circuitry  
- Tracks real-time changes in thoracic circumference using a rotary encoder-based tape measure  
- Tracks real-time changes in abdominal circumference using a rotary encoder-based tape measure  

### Open Hardware Classification  
- Officially registered as open hardware with OSHWA ID nz000002  
- Design documents openly accessible and modifiable by others  
- Falls under the open hardware class, requiring shared design documentation  

### Measurement Integration  
- Synchronizes flow data (Venturi device) with circumferential data (rotary encoders)  
- Secondary measurements complement primary flow assessment in ventilatory circuitry  
- Tape measure components measure circumference changes during breathing cycles