Dialysis machine, in particular for home use
First Claim
1. A dialysis machine comprising a dialyzer with a first blood circulation inlet and a first blood circulation outlet, a dialysate supply means, an arterial line connected between an arteriovenous fistula in a patient and the first dialyzer inlet, a venous line connected between the arteriovenous fistula and the first dializyer outlet, a pump coupled with the arterial line, a dialysate inlet line connected between the dialysate supply means and a second dialyzer inlet, and a dialysate evacuation line connected between a dialysate collection container and a second dialyzer outlet, wherein the dialysate supply means (25) includes at least two chambers (26), each of the at least two chambers containing at least one primary pouch (25a) of sterile dialysate, each of the at least one primary-pouches (25a) connected to the dialysate inlet line (31) leading to the dialyzer (20), pressurizing means for separately pressurizing each of the at least one primary pouches (25a) to provoke the flow of dialysate into the inlet line (31), each of the at least two chambers further containing at least one reserve pouch (25b) of sterile dialysate, with each of the at least one reserve pouches (25b) connected by a conduit (38) to a primary pouch (25a) within each of the at least two chambers (26), the dialysate inlet line (31) including a flow restrictor for generating a predetermined decrease in charge calculated so that for a given pressure in each of the at least two chambers (26), the flow rate and the pressure of the dialysate at the second inlet (23) on the dialyzer (20) have a constant given value, the dialysis machine including a volumetric device (36) connected to the evacuation line (33) at the second outlet (24) of the dialyzer (29), the volumetric device (36) designed to generate, in combination with the means for pressurizing the at least one primary pouch (25a) within each of the at least two chambers (26), a predetermined trans-membrane pressure in the dialyzer.
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Accused Products
Abstract
The invention concerns a dialysis machine (10) comprising a dialyzer (20) having a first inlet (21) and a first outlet (22) for the bloodstream, dialysate supply mechanism (25), an arterial line (16) connected between the patent'"'"'s arteriovenous fistula and the dialyzer, a venous line (17) connected between the arteriovenous fistula and the dialyzer, a pump (28) coupled with the arterial line, a dialysate supply line (31), connected between the dialysate supply mechanism and the dialyzer, a dialysate evacuation line (33) connected between a dialysate recuperating container (27) and the dialyzer. The sterile dialysate bags are arranged in a chamber (26) under a gas pressure.
84 Citations
19 Claims
- 1. A dialysis machine comprising a dialyzer with a first blood circulation inlet and a first blood circulation outlet, a dialysate supply means, an arterial line connected between an arteriovenous fistula in a patient and the first dialyzer inlet, a venous line connected between the arteriovenous fistula and the first dializyer outlet, a pump coupled with the arterial line, a dialysate inlet line connected between the dialysate supply means and a second dialyzer inlet, and a dialysate evacuation line connected between a dialysate collection container and a second dialyzer outlet, wherein the dialysate supply means (25) includes at least two chambers (26), each of the at least two chambers containing at least one primary pouch (25a) of sterile dialysate, each of the at least one primary-pouches (25a) connected to the dialysate inlet line (31) leading to the dialyzer (20), pressurizing means for separately pressurizing each of the at least one primary pouches (25a) to provoke the flow of dialysate into the inlet line (31), each of the at least two chambers further containing at least one reserve pouch (25b) of sterile dialysate, with each of the at least one reserve pouches (25b) connected by a conduit (38) to a primary pouch (25a) within each of the at least two chambers (26), the dialysate inlet line (31) including a flow restrictor for generating a predetermined decrease in charge calculated so that for a given pressure in each of the at least two chambers (26), the flow rate and the pressure of the dialysate at the second inlet (23) on the dialyzer (20) have a constant given value, the dialysis machine including a volumetric device (36) connected to the evacuation line (33) at the second outlet (24) of the dialyzer (29), the volumetric device (36) designed to generate, in combination with the means for pressurizing the at least one primary pouch (25a) within each of the at least two chambers (26), a predetermined trans-membrane pressure in the dialyzer.
- 6. A dialysis machine comprising a dialyzer with a first blood circulation inlet and a first blood circulation outlet, a dialysate supply means, an arterial line connected between an arteriovenous fistula in a patient and the first dialyzer inlet, a venous line connected between the arteriovenous fistula and the first dialyzer outlet, a pump coupled with the arterial line, a dialysate inlet line connected between the dialysate supply means and a second dialyzer inlet, and a dialysate evacuation line connected between a dialysate collection container and a second dialyzer outlet, the dialysate supply means including sterile dialysate contained in at least one pouch (25a), each at least one pouch connected by the dialysate inlet line (31) to the dialyzer (20), and means for pressurizing the pouch (25a) to provoke the flow of dialysate into the inlet line (31), wherein the supply means includes at least two chambers each containing at least one pouch of sterile dialysate, each of said pouches capable of separate pressurization.
Specification