Artificial stomach

1. An artificial stomach for replacing the normal stomach of a patient, comprising:

a food reservoir adapted to collect food,

an inlet connected to a first opening of the food reservoir and further being adapted to upstream connect to the patient's gastrointestinal tract, and

an outlet connected to a second opening of the food reservoir and further being adapted to downstream connect to the patient's gastrointestinal tract,

wherein an outer wall encloses both the food reservoir and a servo reservoir for regulating the size of the food reservoir, the food reservoir and the servo reservoir being separated by a flexible inner wall, where further both the food reservoir wall and the wall of the servo reservoir comprise parts of the outer wall and the flexible inner wall.

2. The artificial stomach according to claim 1 , wherein the servo reservoir is a bellow.

3. The artificial stomach according to claim 1 , wherein the emptying of the food reservoir is direct or indirect regulated by a gear construction.

4. The artificial stomach according to claim 3 , wherein the gear construction is driven by a motor.

5. The artificial stomach according to claim 4 , comprising a servo system connected to said motor, to save force against longer stroke.

6. The artificial stomach according to claim 4 , comprising a servo system connected to said motor and a drive shaft connected to said servo system.

7. The artificial stomach according to claim 4 , wherein the drive shaft direct or indirect affects the emptying of said food reservoir.

8. The artificial stomach according to claim 7 , wherein the drive shaft comprises two ends comprising a thread, spiral ridges turning in different directions at the two ends, further comprising a nut placed on the shaft at each end of the drive shaft, the food reservoir comprising two movable walls of said reservoir, wherein said nuts is adapted to be placed onto said moving walls, the motor adapted to change the volume of said food reservoir, when turning said drive shaft placed into said nuts, by moving said movable walls.

9. The artificial stomach according to claim 1 , wherein the servo reservoir is adapted to have a variable size and to be filled with different amounts of fluid.

10. The artificial stomach according to claim 9 , wherein the servo reservoir is adapted to have a shape allowing variation in size without limitation from surrounded fibrosis, covering the implant when implanted.

11. The artificial stomach according to claim 9 , the artificial stomach further comprising a hydraulic fluid reservoir, hydraulically connected to said servo reservoir and a pump for fluid connecting the fluid supply reservoir to the servo reservoir.

12. The artificial stomach according to claim 11 , wherein said pump for fluid connecting the hydraulic fluid reservoir to the servo reservoir is adapted to reversible move fluid between the servo reservoir and the hydraulic fluid reservoir.

13. The artificial stomach according to claim 9 , wherein said servo reservoir is adapted to be regulated by manually pressing a pumping reservoir in fluid connection with the servo reservoir.

14. The artificial stomach according to claim 13 , further comprising a reversed servo, wherein a small volume in the pumping reservoir is adapted to be moved manually to the servo reservoir in a closed system, compressed with a higher force per area unit and wherein said servo reservoir is adapted to create a larger volume change in a second closed system, having less force per area unit.

15. The artificial stomach according to claim 12 , wherein the outer wall is rigid.

16. The artificial stomach according to claim 15 , wherein the stomach food part comprises the food reservoir and the servo reservoir, and where the hydraulic fluid reservoir is separated from the stomach food part by the rigid outer wall and is further enclosed by a fluid reservoir wall.

17. The artificial stomach according to claim 16 , wherein said food reservoir is adapted to increase in volume when filled with food when the patient is eating, thereby causing a reduction in the volume of the servo reservoir, in turn moving fluid from said servo reservoir to said hydraulic fluid reservoir.

18. The artificial stomach according to claim 1 , being implantable in the patient's abdomen.

19. The artificial stomach according to claim 1 , wherein the inlet is further adapted to upstream connect to the oesophagus.

20. The artificial stomach according to claim 1 , wherein the inlet is further adapted to upstream connect to the intestine.