Infusion of drugs

1. An at least partly implantable system for injecting a substance into a patient's body, comprising

an infusion device comprising an infusion needle for injecting the substance into a part of the body of the patient, the infusion device being adapted for implantation inside the patient's body,

at least one reservoir comprising at least one compartment which accommodates and preserves or is adapted to accommodate and preserve the substance to be injected, the reservoir being adapted for implantation inside the patient's body in fluid connection with the infusion device to supply to the infusion device the substance to be injected into the patient's body, and

a cooling device adapted for implantation inside the patient's body and adapted to cool the reservoir and thereby keep the substance within said at least one compartment of the reservoir at a temperature below 37° C.

2. The system of claim 1 , wherein the reservoir or the at least one first compartment thereof is comprised in an insulation chamber.

3. The system of claim 1 , further comprising a heat exchanger for exchanging heat generated by the cooling device with the patient's body.

4. The system of claim 3 , wherein the heat exchanger is adapted for implantation within the patient's body remote from the cooling device and is connected to the cooling device via fluid lines for conducting a heat exchange fluid.

5. The system of claim 1 , wherein the cooling device contains at least two different chemicals reacting with each other, thereby consuming thermal energy, wherein the at least two chemicals are provided in separate chambers, the system further comprising a flow control device for bringing together certain amounts of the different chemicals.

6. The system of claim 1 , wherein the cooling device comprises a Peltier element or a refrigerator-type construction.

7. The system of claim 1 , wherein at least one first compartment of the reservoir accommodates or is adapted to accommodate a first substance and at least one second compartment of the reservoir accommodates or is adapted to accommodate a second substance, said cooling device being provided for keeping the substance within the at least one second compartment at a temperature below 37° C.

8. The system of claim 7 , wherein the at least one first compartment accommodates or is adapted to accommodate an infusion liquid and the at least one second compartment accommodates or is adapted to accommodate a drug for mixing with the infusion liquid of the first compartment.

9. The system of claim 7 , further comprising a mixing chamber for mixing the substance from the at least one first compartment with the substance from one or more of the at least one second compartment.

10. The system of claim 7 , wherein the substance contained in the at least one second compartment is in powder form or in freeze-dried form.

11. The system of claim 7 , wherein the number of the second compartments is 50 or more, in particular 100 or more.

12. The system of claim 7 , wherein a plurality of the second compartments is liquid-tightly sealed against the at least one first compartment, wherein the system further comprises a mechanism for individually opening a connection between the second compartments and the at least one first compartment.

13. The system of claim 1 , wherein the infusion needle has a tube-like body closed at the tip end and having a laterally arranged delivery exit port, wherein the at least one infusion needle is disposed at least partly within at least one housing with a tip end of the at least one infusion needle arranged for penetrating the at least one housing's outer wall in at least one penetration area, the system further comprising at least one drive unit adapted for implantation inside the patient's body, the at least one drive unit being coupled to the at least one infusion needle and arranged at least for advancing the tip end of the at least one infusion needle so that the at least one infusion needle penetrates, upon advancement of the tip end or ends thereof, the housing's outer wall, wherein at least in the penetration area or areas the outer wall is made from a material which is self-sealing in respect of penetrations resulting from said at least one infusion needle.

14. The system of claim 13 , wherein the at least one infusion needle is arranged for penetrating the at least one housing's outer wall in at least two different penetration areas.

15. The system of claim 13 , wherein the at least one drive unit comprises a hydraulic drive for transmitting hydraulic energy from a remote location within the patient's body to the at least one infusion needle for advancing the tip end of the infusion needle.

16. The system of claim 13 , further comprising at least one of;

at least one pump adapted for implantation inside the patient's body to advance the substance from the reservoir to the at least one infusion device, and

an actuating means for direct manual operation of the pump and/or the drive unit.

17. The system of claim 13 , wherein the drive unit is configured to laterally displace the tip end of the infusion needle to different penetration sites.

18. The system of claim 13 , further comprising an energy source for providing energy to at least one of the pump, the drive unit and the motor, and any other energy consuming part of the system, wherein the system comprises coupling elements for wireless energy transfer from outside the patient's body to the energy storage means for charging the energy storage means from outside a patient's body, when the energy storage means is implanted in a patient's body, wherein at least one feedback sensor is provided and adapted to sense one or more physical parameters of the patient and/or process parameter's of the system, further comprising a feedback subsystem adapted to wirelessly send feedback information relating to the energy to be stored in the energy storage means from inside the human body to the outside thereof, wherein the system is adapted to use the feedback information for adjusting the amount of wireless energy transmitted by the energy transmitter and/or adapted to provide feedback on parameters relevant for the treatment, including the one or more physical parameters of the patient and/or the process parameters of the system.

19. The system of claim 18 , wherein the feedback information relates to an energy balance which is defined as the balance between at least one of; an amount of wireless energy received inside the human body and an amount of energy consumed by the at least one energy consuming part and a rate of wireless energy received inside the human body and a rate of energy consumed by the at least one energy consuming part.

20. The system of claim 13 , wherein the at least one infusion needle is flexibly bendable, wherein the tip end of the at least one infusion needle is arranged for penetrating the outer wall of a first housing and the other end thereof is arranged in a second housing for remote implantation inside the patient's body, the infusion needle being sufficiently long to bridge the distance from the second housing for remote implantation to the first housing and further through the first housing up to the outer wall of the first housing.

21. The system of claim 1 , wherein the drive unit is configured to laterally displace the tip end of at least one of said at least one infusion needle in at least two different lateral directions, adapted to displace the infusion needle in at least; a first lateral direction and back, and a second lateral direction and back, wherein the second direction is different from the first direction, and wherein the drive unit further comprises;

a single, multifunctional drive unit or

a drive unit including a plurality of different drive units suitably arranged to work in

a coordinated fashion, and

wherein the drive unit is adapted to displace the infusion needle in the at least two different lateral directions.