Stakeholder Concerns & Requirements

Identifying stakeholder concerns & deriving top-level requirements.

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Stakeholder Concerns

The Project Tetra is guided by a series of stakeholder concerns, listed below.

1: Volumes fill most compliant lung segment

Volumes would go to the most compliant lung segments

Reference:

2: PEEP would be impossible to manage

Positive end‐expiratory pressure (PEEP), which is of critical importance in these patients, would be impossible to manage.

Reference:

3: Monitoring pulmonary mechanics impossible

Monitoring patients and measuring pulmonary mechanics would be challenging, if not impossible.

Reference:

4: Alarm monitoring infeasible

Alarm monitoring and management would not be feasible.

Reference:

5: Individualized management for clinical improvement

Individualized management for clinical improvement or deterioration would be impossible.

Reference:

6: Stop ventilation in the event of cardiac arrest

In the case of a cardiac arrest, ventilation to all patients would need to be stopped to allow the change to bag ventilation without aerosolizing the virus and exposing healthcare workers.

Reference:

7: Added circuit volume

The added circuit volume defeats the operational self‐test (the test fails).

Reference:

8: External monitoring required

Additional external monitoring would be required. The ventilator monitors the average pressures and volumes.

Reference:

9: Patients deteriorate and recover at different rates.

Patients deteriorate and recover at different rates, and distribution of gas to each patient would be unequal and unmonitored.

Reference:

10: Greatest risk with sudden deterioration

The greatest risks occur with sudden deterioration of a single patient (e.g., pneumothorax, kinked endotracheal tube), with the balance of ventilation distributed to the other patients.

Reference:

User Stories

The Project Tetra’s stakeholder concerns are then used to identify a series of user stories to capture the functional requirements of the Project Tetra project.

1: Volume Adjustment

As a Clinician I want to individually adjust valves so that I can control volumetric flowrate per patient.

Example:

Adjusting flow for each patient, decreasing PIP for the healthier lungs, and increasing PIP for the less healthy patient.

Derived From:

2: Matching Protocols

As a Clinician I want to [object Object] so that I can maintain matching protocols per patient volume.

Example:

Derived From:


Last modified September 4, 2021: remove section for data structures (2c9dbbc)