GB2408455A

GB2408455A - Temporary heart

Info

Publication number: GB2408455A
Application number: GB0327676A
Authority: GB
Inventors: Martin Lister
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-28
Filing date: 2003-11-28
Publication date: 2005-06-01
Also published as: GB0327676D0

Abstract

The temporary heart comprises 2 pumps one that delivers arterial blood (6.2 and 6.3) and one that removes venous blood (6.4 and 6.5) wherein the flow can be varied by means of a sliding resistor 6.15. Blood is stored in replacable tanks (figures 4 and 5).

Description

( 1 2408455

Temporary Heart Description

The heart will stop blood from passing through it when it has stopped pumping blood. The brain cannot survive without blood for more than a very short period of time. Therefore if the heart has stopped or is about to stop as it is faulty a supply of oxygenated blood is required and a means of delivering the arterial blood to the brain is required also a means of retrieving the venous blood is required. Oxygenated blood is required, oxygenated blood may be obtained from a donors arterial blood system or may be produced by application of Oxygen to the blood cells which may accept Oxygen or an artificial Oxygenated blood substitute may be used. The Oxygenated blood is administered to the arterial network of the brain via the carotid artery. The venous blood is retrieved from the brain via the jugular vein. Blood flow to and from the brain of the patient is determined by bodily mass. The Arterial Blood Tank and the Venous Blood Tank are vacuumed of air first. As the arterial blood is used up the level of the arterial blood in the tank goes down therefore the pressure reduces therefore the pump rotates at a greater revolutions per minute rate. Blood could alternatively be oxygenated for the arterial system of the brain and the waste products of respiration could be filtered out so that in a turnaround system the blood could be reoxygenated protein etc food required by the tissues of the brain could be supplied to the blood.

Thus using the Temporary Heart pump operations on the heart or heart replacement could be carried out in safety. The brain can only last for a very short amount of time without fresh oxygenated blood being received by it before brain damage ensues. The other organs can achieve recovery after a longer period without fresh oxygenated blood and afterwards still return to normal after a longer period without fresh oxygenated blood and removal of waste products from the blood than the brain.

Arterial blood is initially pumped through the Arterial Blood Syringe and venous blood is initially pumped through the Venous Blood Syringe before the Arterial Blood Syringe is inserted into the carotid artery and before the Venous Blood Syringe is inserted into the jugular vein so that no air bubbles happen in the artery or vein.

Fig 1 shows the arterial blood delivery syringe Fig 1.1 inserted into the carotid artery and the venous blood syringe Fig 1.2 inserted into the jugular vein. Fig 1.3 is a strap for holding these syringes in place.

Fig 2.1 is the main body of a syringe Fig 2.2 is a tube which attaches to the syringe by way of the top Fig 2.3 pinching it to the syringe' producing an airtight seal when the top is screwed down. ' ( Fig 2.4 to Fig 2.9 is a tap which is on the Arterial Blood Tank and the Venous Blood Tank and the means by which it is hooked up to the Temporary Heart.

Fig 2.4 shows the thread of the bolt of the tap which has a hole in it Fig 2.5, when turned the hole will allow blood to flow through it, turning of the bolt of the tap is by way of the handle Fig 2.6, Fig 2.7 shows a thread, Fig 2.8 is a tube, Fig 2.9 is the top which pinches the tube to the tap producing an airtight seal when the top is screwed down.

Fig 2.10 to Fig 2.12 shows the means by which the tubes from the patient and the Arterial Blood Tank and the Venous Blood Tank attach to the Temporary Heart, Fig 2.10 is a thread from the Temporary Heart, Fig 2.11 is a tube, Fig 2.12 is the top which pinches the tube to the thread from the Temporary Heart producing an airtight seal when the top is screwed down.

Fig 3 shows the Temporary Heart on a trolley which also houses the Arterial Blood Tank and the Venous Blood Tank also shown is the way the tubes are arranged from the Temporary Heart to the patient and the Arterial Blood Tank and the Venous Blood Tank. Fig 3.1 shows the arterial blood syringe inserted into the carotid artery.

Fig 3.2 shows the venous blood syringe inserted into the jugular vein. Fig 3.3 is attachment of the tube from the arterial blood syringe to the Temporary Heart.

Fig 3.4 is attachment of the tube from the venous blood syringe to the Temporary Heart. Fig 3.5 is the Temporary Heart. Fig 3.6 shows attachment of the tube from the arterial blood pump to the Arterial Blood Tank, attachment to this tank is at tap Fig 3.9. Fig 3.7 shows attachment of the tube from the venous blood pump to the Venous Blood Tank, attachment to this tank is at tap Fig 3.10. Fig 3.8 is a plug for power supply which may be from a DC source or the Temporary Heart may convert mains AC into DC via this plug. Fig 3.11 is the Arterial Blood Tank. Fig 3.12 is the Venous Blood Tank. Fig 3.13 is the trolley, which can be wheeled around.

Fig 4 is the Arterial Blood Tank Fig 4.1 is hollow cubical shaped with its taps Fig 4.2 and Fig 4.3 and a carry handle Fig 4.4.

Fig 5 is the Venous Blood Tank Fig 5.1 is hollow cubical shaped with its tap Fig 5.2 and carry handle Fig 5..

Fig 6 is the Temporary Heart showing attachment of tubes to it and internal workings are detailed.

Fig 6.1 is a compartment for storing the circuitry.

Fig 6.2 is a compartment for storing the motor of the arterial blood pump. Fig 6.3 is a compartment for storing the pump turbine of the arterial blood pump.

Fig 6.4 is a compartment for storing the motor of the venous blood pump. Fig 6.5 is a compartment for storing the pump turbine of the venous blood pump. Fig 6.6 is a compartment that could be used for an AC to DC converter or for wiring or for attachment of the Temporary Heart to the trolley. Fig 6.7 is a hollow column for wiring to go through, to the motors and the circuit from the power supply. Fig 6.8 is attachment of the tube from the syringe of the carotid artery to the Temporary Heart.

Fig 6.9 is attachment of the tube to the Arterial Blood Tank from the Temporary Heart at the fixture point of the Temporary Heart. Fig 6.10 is attachment of the tube from the syringe of the jugular vein to the Temporary Heart. Fig 6.11 is attachment of the tube to the Venous Blood Tank from the Temporary Heart at the fixture point of the Temporary Heart. Fig 6.12 is the on off switch of the Temporary Heart. Fig 6.13 is the on off indicator light of the Temporary Heart. Fig 6.14 is the LCD display of the Temporary Heart showing blood flow rate in pints per minute. Fig 6. 15 is the sliding contact of the variable resistor, the variable resistor being used to cater for different sized patients, and hence to cater for different blood flow rates to and from the patient by supplying variable torques of both blood flow into and out of the patient simultaneously, alternatively the resistors of the multivibrator astable part of the circuit could be varied by a sliding resistor so that the time the pumps are energised and hence the amount of pumping they do can be determined by the sliding contact of a variable resistor. Fig 6.16 is the channel of the variable resistor sliding contact. Fig 6.17 is the power cable of the Temporary Heart.

Fig 7 is a circuit for the Temporary Heart from a power source which is DC or considering the power source to already have been stepped down rectified and smoothed to have produced DC from an AC source, whichever is available.

Claims

Temporary Heart Claims 1. The Temporary Heart is a device which can

deliver arterial blood to a patient by means of a pomp and remove venous blood from the patient by means of a pump, the patients heart can thus be operated on in relative safety or replaced, the flow of blood into and out of the patient via the Temporary Heart can be varied to cater for different sized patients, blood supply to the Temporary Heart can be from a replaceable blood storage tank, blood supply to the Temporary Heart can be from a turnaround system which removes waste products from blood and oxygenates etc it.
2. The Temporary Heart is substantially as described herein with reference to the accompanying description and drawings.