US 12,214,157 B2
Fluid interface device for delivering fluid to and/or withdrawing fluid from a patient
Carlo Andretta, Uitikon-Waldegg (CH)
Assigned to SeraIP AG, Stans (CH)
Filed by SeraIP AG, Stans (CH)
Filed on Sep. 3, 2021, as Appl. No. 17/465,880.
Application 17/465,880 is a continuation of application No. 16/060,963, granted, now 11,110,222, previously published as PCT/EP2016/080694, filed on Dec. 12, 2016.
Claims priority of application No. 15199669 (EP), filed on Dec. 11, 2015; application No. 16176765 (EP), filed on Jun. 28, 2016; and application No. 16176771 (EP), filed on Jun. 28, 2016.
Prior Publication US 2022/0054749 A1, Feb. 24, 2022
Int. Cl. A61M 5/142 (2006.01); A61B 5/15 (2006.01); A61B 5/157 (2006.01); A61M 5/172 (2006.01); A61M 39/02 (2006.01); A61M 39/10 (2006.01)
CPC A61M 5/14276 (2013.01) [A61B 5/157 (2013.01); A61M 5/1723 (2013.01); A61M 39/0208 (2013.01); A61M 39/10 (2013.01); A61B 5/15003 (2013.01); A61M 2039/0276 (2013.01); A61M 2230/201 (2013.01)] 37 Claims
OG exemplary drawing
 
1. A fluid interface device for delivering fluid to and/or withdrawing fluid from a body of a patient, the device comprising:
a peripheral base element;
a fluid transmission element forming a central portion of the device and being sealingly connected to the peripheral base element which is circumferentially arranged around the fluid transmission element, the fluid transmission element comprising a front platelet with a primary face and a secondary face opposed to the primary face, the primary face being in contact with a patient's body fluid region when the device is implanted into the body of the patient, the fluid transmission element further comprising a counterplate sealingly stacked against the secondary face of the front platelet and forming a buffer volume therebetween;
the front platelet comprising at least one array of microchannels defining a fluid passage between the buffer volume and the primary face, each of the microchannels is a circular microchannel or a non-circular microchannel, wherein each of the circular microchannels has a diameter of 0.6 μm to 2 μm and each of the non-circular microchannels has a smallest transversal size of 0.6 μm to 2 μm;
the fluid transmission element having at least one fluid port for fluid delivery to and/or fluid withdrawal from the buffer volume,
wherein the primary face is provided with guard elements protruding with respect to a plane defined by microchannel exits located in the primary face, the guard elements being formed in such manner as to define at least one transversal limitation over each microchannel exit, the transversal limitation being larger than, for each of the circular microchannels, the diameter of each of the circular microchannels and, for each of the non-circular microchannels, the smallest transversal size of each of the non-circular microchannels and being in the range of 2 μm to 4 μm.
 
31. A fluid interface device for delivering fluid to and/or withdrawing fluid from a body of a patient, the device comprising:
a peripheral base element;
a fluid transmission element forming a central portion of the device and being sealingly connected to the peripheral base element which is circumferentially arranged around the fluid transmission element, the fluid transmission element comprising a front platelet with a primary face and a secondary face opposed to the primary face, the primary face being in contact with a patient's body fluid region when the device is implanted into the body of the patient, the fluid transmission element further comprising a counterplate sealingly stacked against the secondary face of the front platelet and forming a buffer volume therebetween;
the front platelet comprising at least one array of microchannels defining a fluid passage between the buffer volume and the primary face, each of the microchannels is a circular microchannel or a non-circular microchannel, wherein each of the circular microchannels has a diameter of 0.2 μm to 10 μm and each of the non-circular microchannels has a smallest transversal size of 0.2 μm to 10 μm;
the fluid transmission element having at least one fluid port for fluid delivery to and/or fluid withdrawal from the buffer volume, wherein
(i) the counterplate is substantially planar and wherein the buffer volume is enclosed within a peripheral protrusion zone of the secondary face of the front platelet, and/or
(ii) the buffer volume comprises at least two separate compartments, each compartment being in connection with a respective microchannel array and the at least one fluid port.
 
34. A fluid interface device for delivering fluid to and/or withdrawing fluid from a body of a patient, the device comprising:
a peripheral base element;
a fluid transmission element forming a central portion of the device and being sealingly connected to the peripheral base element which is circumferentially arranged around the fluid transmission element, the fluid transmission element comprising a front platelet with a primary face and a secondary face opposed to the primary face, the primary face being in contact with a patient's body fluid region when the device is implanted into the body of the patient, the fluid transmission element further comprising a counterplate sealingly stacked against the secondary face of the front platelet and forming a buffer volume therebetween;
the front platelet comprising at least one array of microchannels defining a fluid passage between the buffer volume and the primary face, each of the microchannels is a circular microchannel or a non-circular microchannel, wherein each of the circular microchannels has a diameter of 0.2 μm to 10 μm and each of the non-circular microchannels has a smallest transversal size of 0.2 μm to 10 μm;
the fluid transmission element having at least two fluid ports for fluid delivery to and/or fluid withdrawal from the buffer volume, each fluid port being arranged in the counterplate, the fluid interface device further comprising a spacer element made of a thermoplastic polymer, the spacer element having a first spacer face that is adhesively connected to an external face of the counterplate, the spacer element comprising traversing channels connecting the first spacer face and a second spacer face, each traversing channel being arranged to form a passage between one of the fluid ports and a corresponding channel opening at the second spacer face.