Infusion pump comprising a computer for calculating the respective maximum permissible dosage

• US 20050021006A1
• Filed: 06/07/2004
• Published: 01/27/2005
• Est. Priority Date: 09/18/1998
• Status: Active Grant

• Current Assignee: Codman Neuro Sciences Sarl
• Original Assignee: Codman Neuro Sciences Sarl
• Inventors: Tonnies, Jan G.
• Granted Patent: US 7,931,642 B2
• Time in Patent Office: Days
• US Class Current: 604/890.100
• CPC Class Codes: A61M 2005/1405 Patient controlled analgesia [PCA]
• CPC Class Codes: A61M 2205/3507 with implanted devices, e.g. external control
• CPC Class Codes: A61M 5/14276 specially adapted for implantation
• CPC Class Codes: A61M 5/172 electrical or electronic A61M5/16804, A61M5/16831 take precedence

Abstract

Infusion pump for the delivery of a quantity of a medicament to the body of a patient determinable by means of an electronic control device, the pump being provided with a computer for calculating the maximum permitted administration quantity for each case as a function of the previously delivered quantity and with a blocking device for preventing further administration of the medicament on exceeding a predetermined, permitted maximum value, in which the computer determines the quantity or concentration of the active substance in the body of the patient resulting from the delivered medicament quantity and its breaking down in the body and compares it with the predetermined maximum value.

Claims

1. An infusion pump for the delivery of an amount of a medicament to the body of a patient determinable by means of an electronic control device, the infusion pump comprising:

a) a computer for calculating the maximum permitted quantity to be administrated each time as a function of any previously delivered quantity and the expected breaking down rate of the medicament,

b) a blocking device for preventing further administration of the medicament on exceeding a predetermined, permitted maximum value,

c) the computer having a memory in which is stored a quantitative figure resulting from a summation of a total delivered medicament amount and a subtracting of a percentage of a quantity entered in the memory resulting from an expected breaking down of the medicament in the body, and

d) the computer having a comparator which constantly compares the quantity entered in the memory with a predetermined, permitted maximum value.

2. The infusion pump according to claim 1, further comprising a device which, with a predetermined time interval corresponding to the expected breaking down of the medicament in the body, can subtract a fixed percentage of the quantity entered in the memory.

3. An infusion pump according to claim 1, further comprising a device which with fixed, predetermined time intervals brings about a subtraction of a percentage of the quantity entered in the memory corresponding to the expected breaking down of the medicament.

4. An infusion pump according to claim 2, wherein the infusion pump is implantable within the body of the patient and can be operated by an external control device.

5. An infusion pump according to claim 4, wherein the computer is a first computer which operates the infusion pump and a second computer operates the external control device.

6. An infusion pump according to claim 3, wherein the infusion pump is implantable within the body of the patient and can be controlled by an external control device.

7. An infusion pump according to claim 6, wherein the computer is a first computer which operates the infusion pump and a second computer operates the external control device.