Method and device for the vascular pressure-controlled selective perfusion of fluids through blood vessels
First Claim
1. Method for the selective perfusion of fluids through blood vessels, controlled by the pressure in said blood vessels, comprising:
- introducing a tubing line into a patient'"'"'s vein in which perfusion is to be performed, said tubing line being open at its proximal end for perfusing fluids through a tissue region, sealing off said vein from the line in the area of its proximal end, performing the following steps while maintaining said vein in the sealed-off condition;
(1) pumping said fluid periodically at intervals into said vein via said tubing line and suctioning blood from said vein via said tubing line, said pumping and suctioning intervals being synchronized with the patient'"'"'s heartbeat, (2) measuring the internal pressure of said vein, and (3) regulating said perfused flow of fluid during pumping in step (1) in such a way that a predefined set value for the internal pressure of said vein is maintained as closely as possible.
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Accused Products
Abstract
A method for selective perfusion of fluids through blood vessels is controlled by the pressure in the blood vessels. A tubing line open at the proximal end for the perfusion of fluids through a tissue region is introduced into a patient'"'"'s blood vessel in which perfusion is to be performed. The vessel is sealed off from the line in the area of its proximal end, and fluid is pumped into the vessel. The method is characterized in that a specific set value for the internal pressure of the vessel is measured, and the perfused flow of fluid is regulated during pumping in such a way that the set value for the internal pressure of the vessel is kept as closely as possible.
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Citations
26 Claims
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1. Method for the selective perfusion of fluids through blood vessels, controlled by the pressure in said blood vessels, comprising:
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introducing a tubing line into a patient'"'"'s vein in which perfusion is to be performed, said tubing line being open at its proximal end for perfusing fluids through a tissue region, sealing off said vein from the line in the area of its proximal end, performing the following steps while maintaining said vein in the sealed-off condition;
(1) pumping said fluid periodically at intervals into said vein via said tubing line and suctioning blood from said vein via said tubing line, said pumping and suctioning intervals being synchronized with the patient'"'"'s heartbeat, (2) measuring the internal pressure of said vein, and (3) regulating said perfused flow of fluid during pumping in step (1) in such a way that a predefined set value for the internal pressure of said vein is maintained as closely as possible. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Device for the selective perfusion of a fluid through blood vessels, controlled by the pressure in said blood vessels, comprising:
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a tubing line which can be introduced into a patient'"'"'s vein, said tubing line open at its proximal end thereof and being chargeable with a fluid under pressure which is to be pumped into said vein, said proximal end of said tubing line being provided with an enlargeable sealing means for sealing said vein off from said tubing line, a suction device connected to said tubing line for withdrawing blood from said vein of said patient, said control unit receiving signals from the patient'"'"'s heartbeat and defining pumping and suction intervals which are synchronized with the patient'"'"'s heart cycle, a control unit, means for measuring the internal pressure of said vein, said measuring means being connected to said control unit, means for regulating the perfused flow of fluid, said regulation means being operated by said control unit during a period when said enlargeable sealing means seals off said vein such that a defined set value for the internal pressure of the vein is maintained as constant as possible during pumping of said fluid. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. Method for the selective perfusion of fluids through blood vessels, controlled by the pressure in said blood vessels, comprising:
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introducing a tubing line into a patient'"'"'s vein in which perfusion is to be performed, said tubing line being open at its proximal end for perfusing fluids through a tissue region, sealing off said vein from the line in the area of its proximal end, performing the following steps while maintaining said vein in the sealed-off condition;
(1) pumping said fluid periodically at intervals into said vein via said tubing line, the pumping intervals being synchronized with the patient'"'"'s heartbeat, (2) measuring the internal pressure of said vein, and (3) regulating said perfused flow of fluid during pumping in step (1) in such a way that a predefined set value for the internal pressure of said vein is maintained as closely as possible, said predefined set value for the internal pressure of said vein being determined with said vein being sealed off and in the absence of venous blood flow, and by performing the steps of infusing fluid while increasing the flow of fluid at each pumping interval, measuring the internal pressure of the vein, and selecting a plateau pressure being created in said vein as said predefined set value. - View Dependent Claims (22, 23)
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21. Method for the selective perfusion of fluids through blood vessels, controlled by the pressure in said blood vessels, comprising:
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introducing a tubing line into a patient'"'"'s vein in which perfusion is to be performed, said tubing line being open at its proximal end for perfusing fluids through a tissue region, sealing off said vein from the line in the area of its proximal end, performing the following steps while maintaining said vein in the sealed-off condition;
(1) pumping said fluid periodically at intervals into said vein via said tubing line, the pumping intervals being synchronized with the patient'"'"'s heartbeat, (2) measuring the internal pressure of said vein, and (3) regulating said perfused flow of fluid during pumping in step (1) in such a way that a predefined set value for the internal pressure of said vein is maintained as closely as possible, said predefined set value for the internal pressure of said vein being determined with said vein being sealed off and in the presence of venous blood flow, and by performing the steps of measuring the internal pressure of the vein, selecting a plateau pressure of the peak venous pressures being created in said vein in this process as said set value.
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24. Device for the selective perfusion of a fluid through blood vessels, controlled by the pressure in said blood vessels, comprising:
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a tubing line which can be introduced into a patient'"'"'s vein, said tubing line open at its proximal end thereof and being chargeable with a fluid under pressure which is to be pumped into said vein, said proximal end of said tubing line being provided with an enlargeable sealing means for sealing said vein off from said tubing line, said tubing line comprising a multi-lumen catheter, in particular an at least three-lumen artery catheter for perfusion, said multi-lumen catheter comprising an admission line for said fluid, a measurement line for determining the internal pressure of a catheterised artery, and a control line for said enlargeable sealing means, a control unit, means for measuring the internal pressure of said vein, said measuring means being connected to said control unit, means for regulating the perfused flow of fluid, said regulation means being operated by said control unit during a period when said enlargeable sealing means seals off said vein such that a defined set value for the internal pressure of the vein is maintained as constant as possible during pumping of said fluid. - View Dependent Claims (25, 26)
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Specification