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The Haemonetics® Cardiovascular Perioperative Autotransfusion System (cardioPAT™) is indicated for use to salvage red blood cells from blood lost intraoperatively and postoperatively during cardiovascular surgical procedures, where the expected rate of processing of salvaged blood and fluid aspirated from the surgical site is less than or equal to two liters per hour. Autotransfusion is indicated for patients who meet at least one of the following criteria: The patient is expected to lose sufficient blood in the perioperative period, so as to require red blood cell transfusion, and autotransfusion will likely reduce or eliminate the need for allogeneic blood transfusion. Religious beliefs cause the patient to refuse allogeneic transfusion, but accept autologous transfusion. Compatible allogeneic blood is not available. The patient is unable to donate sufficient quantities of autologous blood prior to surgery to adequately cover the anticipated transfusion requirement. The patient or physician prefers perioperative autotransfusion rather than preoperative autologous donation or transfusion of allogeneic blood.

The cardioPAT system is designed to provide perioperative autotransfusion for patients undergoing cardiovascular surgery. The system consists of an electromechanical device and a sterile single-use disposable set, which together collect and process red blood cells lost during or after surgery. It is designed to be used in the operating room to recycle blood lost during cardiovascular surgical procedures and in the recovery room to recycle blood lost after surgery, where the expected rate of processing of salvaged blood and fluid aspirated from the surgical site is less than or equal to two liters per hour. It is a small portable system which mounts on an IV pole.

Here's a breakdown of the acceptance criteria and the study that proves the device meets them, based on the provided text:

1. Table of Acceptance Criteria and Reported Device Performance

Note: The document states, "The quality of salvaged red blood cells returned to the donor during autotransfusion procedures with both the current cardioPAT and modified cardioPAT system is acceptable with respect to measured markers." While specific numeric acceptance criteria are not explicitly given, the presentation of these mean values, with the accompanying statement of acceptability, implies these are the performance targets or within acceptable ranges determined by the manufacturer.

2. Sample Size Used for the Test Set and Data Provenance

• Test Set Sample Size: The document does not explicitly state the total number of samples or "pools of different hematocrit blood" tested. It lists results for 5%, 15%, and 40% hematocrit levels, implying at least three distinct test conditions.
• Data Provenance: The study was conducted under "simulated use conditions." There is no information regarding the country of origin of the data or whether it was retrospective or prospective. The reference "From TP- & TR-DIS-02028" suggests an internal company test report.

3. Number of Experts Used to Establish Ground Truth for the Test Set and Qualifications of those Experts

This information is not provided in the document. The study appears to be a laboratory performance test measuring objective criteria (washout percentages, recovery percentage) rather than requiring expert assessment for ground truth.

4. Adjudication Method for the Test Set

This information is not applicable and therefore not provided, as the study involves objective measurements rather than subjective expert consensus.

5. If a Multi-Reader Multi-Case (MRMC) Comparative Effectiveness Study was done, If so, what was the effect size of how much human readers improve with AI vs without AI assistance

This information is not applicable as the device is an autotransfusion system, not a diagnostic AI system that would assist human readers in interpretation.

6. If a Standalone (i.e. algorithm only without human-in-the-loop performance) was done

This information is not applicable as the device is an electromechanical autotransfusion system, not an algorithm, and its performance relies on its mechanical and operational function, not an algorithm's interpretation.

7. The Type of Ground Truth Used

The ground truth for this device's performance is based on objective laboratory measurements of:

• Supernatant concentrations of Heparin, Albumin, and Hemoglobin (used to calculate washout percentages).
• Red blood cell recovery percentage.

These are direct measurements of the physical properties and efficacy of the device's processing function.

8. The Sample Size for the Training Set

This information is not applicable as the device is an electromechanical system, not an AI/machine learning algorithm that requires a training set.

9. How the Ground Truth for the Training Set was Established

This information is not applicable for the same reason as above.

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