750 NATIONAL COURT, RICHMOND, CALIFORNIA, 9480

3. Low Priming Volume (1 liter for the adult size);

4. inherently constant blood volume;

5. Low hemodynamic resistance [about 25 millimeters Hg. at 3 liters/min. at 34°C.)

6. Negligible hemolysis;

7. Only one (1) pump is needed for the perfusion circuit;

8. The lung embodies integral heat exchange permitting rapid temperature changes [more than `/2-C per minute for a large adult];

9. All parts in contact with blood are disposable (except five (5) stainless steel bolts);

10. Membranes are robust and precision die-cut;

11. All membranes are pretested, and are free from pinholes;

12. By pretesting the lung any instance of faulty assembly can be eliminated;

13. The lung can be processed and tested in three hours;

14. In clinical use the lung has proved completely reliable.

DESCRIPTION OF THE UNIT

The complete equipment constitutes on integrated system for safe, accurate and physiologically adequate extracorporeal circulation. It comprises the following.

1. One single roller, fully occlusive arterial pump (flow rate up to 5 liters/minute).

2. A 14 cell Membrane Lung with 5.6 square meters effective diffusion area.

3. A disposable blood filter and bubble trap. 4. A disposable (plastic) control bladder or "atrium" receiving the venous blood from the patient.

6. A water circulating and automatic pressurizing system which maintains constant pressure difference between blood and water cells in the lung.**

7. A heat exchange system permitting the highest desired rates of cooling or rewarming of the patient.

8. Three single roller suction pumps for returning cardiotomy blood to the circuit.

9. All necessary automatic and manual controls.

10. Full instrumentation including alarm systems.

NOTE: Coronary perfusion equipment can also be supplied but is not ct standard accessory.

THE COMBINED EFFECT OF THE "CLOSED" BLOOD CIRCUIT, INHERENTLY CONSTANT BLOOD VOLUME AND AUTOMATIC PUMP SPEED CONTROL IS TO SIMPLIFY GREATLY THE TASK OF THE MACHINE OPERATOR.

**This unique feature is responsible for a.] low blood volume; b.) constant blood volume; c.) protection of membranes against stress and rupture; d.) outstandingly powerful heat exchange.