Pump housing for blood pump and blood pump

Abstract

The present invention relates to a pump housing (10) for a blood pump (100). [Solution] The pump housing (10) includes a distal end portion (12) having a first blood flow opening (14), a proximal end portion (16), an intermediate portion (18) extending axially between the distal end portion (12) and the proximal end portion (16), the intermediate portion (18) having at least one second blood flow opening (20), and a first sensor (22) for sensing at least one parameter, in particular aortic pressure, where the first sensor (22) is disposed on an outer circumferential surface (24) of the intermediate portion (18), and the pump housing (10) includes a second sensor (26) disposed on the distal end portion (12) for sensing at least one parameter, in particular pressure at the first blood flow opening. The present invention further relates to a blood pump including a corresponding pump housing (10).

Description

[Technical field]

[0001] The present invention relates to a pump housing for a blood pump and to a blood pump respectively comprising the pump housing, the blood pump being preferably a catheter pump or an intravascular blood pump. [Background technology]

[0002] Various types of blood pumps are known, for example intravascular blood pumps that can be introduced into a patient's heart to assist blood flow from the heart to blood vessels such as arteries. Intravascular blood pumps can be introduced percutaneously through the vascular system during a cardiac procedure, for example by a catheterization procedure. Blood pumps typically consist of a pump housing, a cannula, and a catheter. The cannula is attached to a cannula mounting portion provided at a distal end portion of the pump housing, and the catheter is attached to a proximal end portion of the pump housing. Typically, such intravascular blood pumps are used as left ventricular assist devices, with the cannula reaching the left ventricle through the aortic valve, whereby the pump housing and catheter are placed in the aorta outside the heart. A pump element in the form of an impeller is placed in the pump housing and generates a suction pressure such that blood is ejected from the left ventricle into the aorta to restore proper systemic blood flow. Thus, the pump housing further comprises at least one blood flow opening through which blood can exit the blood pump and enter a blood vessel.

[0003] The first need generally associated with such blood pumps is mechanical stability. In particular, any malfunction or mechanical failure must be detected urgently or it may lead to a dangerous situation that directly affects the vitality and health of the patient. This not only deals with the deterioration of the pumping performance of the blood pump, but also with the detachment of particles or materials from the blood pump itself, which may cause damage to the vascular system of the patient.

[0004] The second need is to avoid the occurrence of suction, which may occur if the left ventricular ejection is too large. Suction events may lead to arrhythmias and may also cause tissue trauma in the left ventricle. In addition, suction events may lead to a reduction in blood flow, which may itself cause damage to the blood pump. In some implementations of blood pumps, sufficient blood flow is required to lubricate and cool the impeller bearings or other parts of the blood pump. Thus, suction events may cause secondary damage, which may itself again impose a dangerous situation on the patient's vitality and health. Naturally, this needs to be avoided.

[0005] One possibility to quickly detect malfunctions and draw conclusions about suction events is to monitor the blood pressure around the blood pump introduced into the patient's heart. Thus, US Pat. No. 5,399,433 and US Pat. No. 5,499,446 propose to place a sensor on the outer periphery of the pump housing to monitor the aortic pressure. A detected pressure drop may provide the insight that the mechanical stability of the blood pump is no longer guaranteed and that urgent medical attention is necessary to ensure the vitality and health of the patient.

[0006] A further possibility is to monitor the power consumption of the motor, for example by monitoring the current consumption of the motor. Peaks and drops in the power consumption of the motor provide further insight into the operating characteristics of the blood pump, from which the suction pressure of the blood pump can be derived. However, monitoring the power consumption is less important if the electric motor is not fixedly coupled to the impeller, for example by a shaft. In recent years, a contactless coupling between the motor and the impeller has proven to be an advantage. For example, US Pat. No. 5,399,436 proposes a magnetic drive unit for rotating the impeller. In such a system, the peaks and drops in the power consumption cannot be sufficiently related to the performance of the blood pump.

[0007] There is therefore a need to provide further feasibility of reliably detecting aspiration events and blood pump malfunctions. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] International Publication No. 2020 / 061399 [Patent Document 2] International Publication No. 2017 / 214118 [Patent Document 3] International Publication No. 2020 / 187860 Summary of the Invention [Means for solving the problem]

[0009] According to a first aspect, a pump housing for a blood pump includes a distal end portion having a first blood flow opening, a proximal end portion, and an intermediate portion extending axially between the distal end portion and the proximal end portion. The intermediate portion has at least one second blood flow opening. The pump housing includes a first sensor for sensing at least one parameter, in particular vascular pressure, preferably aortic pressure, the first sensor being arranged on an outer circumferential surface of the intermediate portion. The pump housing further includes a second sensor, the second sensor being arranged on the distal end portion for sensing at least one parameter, in particular pressure at the first blood flow opening.

[0010] The second sensor is arranged upstream or downstream of the first sensor and transmits a further parameter, in particular the pressure at the first blood flow opening. Thus, not only the vascular pressure can be sensed directly, but also the pressure at the first blood flow opening. The pressure at the first blood flow opening does not have to be derived, for example, from the power consumption of the motor. In case of a suction event, the pressure drop at the first blood flow opening can be sensed directly and further measures can be taken immediately to ensure the vitality of the patient. Furthermore, this also increases the safety, in particular of blood pumps with a non-rigid coupling between the motor and the impeller.

[0011] The first blood flow opening can be a blood flow inlet or a blood flow outlet. Accordingly, the at least one second blood flow opening can be a blood flow outlet or a blood flow inlet. Depending on the application of the blood pump, the blood flow is thus generated from the first blood flow opening to the second blood flow opening or from the second blood flow opening to the first blood flow opening. Preferably, the blood pump is a left ventricular support, so that the first blood flow opening is preferably a blood flow inlet and the at least one second blood flow opening is preferably a blood flow outlet.

[0012] The distal end portion may include a thickened portion and the thickened portion may extend radially inward from the distal end portion. The second sensor may be disposed in the thickened portion. Preferably, the distal end portion may include a cannula mounting portion and the thickened portion may extend radially inward from the cannula mounting portion. The thickened portion ensures sufficient material thickness to support the second sensor and reduces the risk of the second sensor becoming dislodged.

[0013] The thickened portion may include a support recess, and the second sensor may be disposed within the support recess. The support recess may be configured to specifically set the location of the second sensor, which greatly facilitates attachment of the second sensor and further ensures accurate location of the second sensor relative to the distal end portion.

[0014] The thickened portion may taper axially from the first blood flow opening to the intermediate portion, in particular, the thickened portion may taper smoothly to minimize obstructed blood flow.

[0015] A support member having at least two arm portions may be disposed at the distal end portion, and one of the arm portions may include a thickened portion, the support member reducing turbulence in the blood flow, the thickened portion being directly integrated into the support member or one of the arm portions, respectively.

[0016] The support member may include a bearing support portion concentric with the distal end portion, and the arm portion may be connected to the bearing support portion. Preferably, the bearing support portion may have an axial end facing the first blood flow opening, and the axial end of the bearing support portion is preferably displaced axially inward from the first blood flow opening toward the middle portion. The bearing support portion is intended to support the bearing of the impeller. Recessing the bearing support portion relative to the first blood flow opening further reduces blood flow turbulence. In addition, the overlapping distal end portion allows the second sensor to be positioned as far upstream as possible of the first sensor.

[0017] The pump housing may further include a first elongated transmission, and the first sensor may include a first axial end and a second axial end. The first elongated transmission may be coupled to the second axial end of the first sensor, and the first elongated transmission may extend to a proximal end portion of the pump housing. Preferably, the first elongated transmission is a cable, a fiber, an optical fiber, or a light guide.

[0018] The pump housing may further include a first channel extending between the intermediate portion and the proximal end portion of the pump housing. The first elongated transmission may be disposed in the first channel. The first channel is preferably recessed from the outer circumferential surface of the intermediate portion and the outer circumferential surface of the proximal end portion of the pump housing. The first channel is preferably lined with resin, so that the first elongated transmission is fixed in the first channel. This significantly reduces the risk of the first sensor or the first elongated transmission becoming dislodged when the blood pump is introduced into the vasculature of the patient. Furthermore, there is no need to guide the first elongated transmission into the pump housing and thus close to the impeller and the motor.

[0019] The second sensor may include a first axial end and a second axial end, and the first axial end of the second sensor may be radially flush with the first blood flow opening. This ensures that at least one parameter is sensed directly at the first blood flow opening. In particular, this allows for accurate measurement of the suction pressure.

[0020] The pump housing may further include a second elongated transmission coupled to a second axial end of the second sensor. The second elongated transmission may extend to a proximal end portion of the pump housing. Preferably, the second elongated transmission is a cable, a fiber, an optical fiber, or a light guide.

[0021] The pump housing may further include a second channel extending between the distal end portion and the proximal end portion of the pump housing. The second elongated transmission may be disposed in the second channel. The distal end portion of the pump housing may include an outer circumferential surface, and the proximal end portion of the pump housing may include an outer circumferential surface. The second channel may be recessed from the outer circumferential surfaces of the distal end portion, the intermediate portion, and the proximal end portion of the pump housing. Preferably, the second channel is lined with resin, so that the second elongated transmission is fixed in the second channel. This significantly reduces the risk of the second sensor or the second elongated transmission becoming dislodged when the blood pump is introduced into the vasculature of the patient. Furthermore, there is no need to guide the second elongated transmission into the pump housing, and thus close to the impeller and the motor.

[0022] The proximal end portion of the pump housing may have a smaller diameter than the intermediate portion of the pump housing. The intermediate portion of the pump housing may taper toward the proximal end portion of the pump housing. This allows sufficient space within the pump housing to accommodate, for example, a motor and an impeller. Additionally, the proximal end portion may include a catheter attachment portion, which therefore has a smaller diameter than the intermediate portion.

[0023] The first sensor may be an optical sensor. The second sensor may be an optical sensor. In particular, the first sensor and / or the second sensor may be an optical fiber sensor, preferably an intrinsic optical fiber sensor. Thus, the parameters to be sensed, preferably the aortic pressure and the pressure at the first blood flow opening, may be easily measured.

[0024] According to a second aspect, a blood pump includes a pump housing as described above. The blood pump may be a catheter pump or an intravascular blood pump.

[0025] The foregoing summary, as well as the following detailed description of exemplary embodiments, will be better understood when read in conjunction with the appended drawings. For purposes of explaining the present disclosure, reference is made to the drawings. However, the scope of the present disclosure is not limited to the specific embodiments disclosed in the drawings. In the drawings: [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is a side view of a blood pump with a pump housing having a cannula and catheter attached thereto, shown diagrammatically. [Diagram 2] FIG. 2 is a side view of a pump housing of the blood pump shown in FIG. [Diagram 3] FIG. 3 is a perspective view of a pump housing shown in FIG. 2. [Figure 4] FIG. 3 is a detailed view of a distal end portion of the pump housing shown in FIG. 2. [Diagram 5] 3 is a diagram showing details of a first sensor of the pump housing shown in FIG. 2. [Figure 6] 3 is a cross-sectional view of the distal end portion of the pump housing shown in FIG. 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] The embodiments of the present disclosure will be described in detail with reference to the drawings, and like reference numerals are regarded as similar or identical elements. It should be understood that the disclosed embodiments are merely examples of the present disclosure, which may be embodied in various forms. Well-known functions or structures are not described in detail to avoid obscuring the present disclosure in unnecessary detail. Therefore, the specific structure and function details disclosed in this specification should not be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching those skilled in the art to use the present disclosure in various ways in substantially any appropriately detailed structure.

[0028] In order to provide a general understanding of the systems, methods, and devices described herein, certain illustrative examples are described. Although an intravascular blood pump may be described in various examples, it will be understood that the improvements of the present technology can also be applied and adapted to other types of medical devices, such as electrophysiology study and catheter ablation devices, angioplasty and stenting devices, angiography catheters, peripherally inserted central catheters, central venous catheters, midline catheters, peripheral catheters, inferior vena cava filters, abdominal aortic aneurysm treatment devices, thrombectomy devices, TAVR delivery systems, cardiac therapy and cardiac assist devices including balloon pumps, cardiac assist devices implanted through surgical incisions, and any other venous or arterial based introduction catheters and devices. As is known, an intravascular blood pump may be surgically or percutaneously introduced into a patient to pump blood from one location of the heart or circulatory system to another location of the heart or circulatory system. For example, an intravascular blood pump may pump blood from the left ventricle of the heart to the aorta when deployed in the left ventricle. When deployed in the right ventricle, the intravascular blood pump can pump blood from the inferior vena cava to the pulmonary artery.

[0029] As used herein, "proximal" and "distal" are viewed relative to the physician, and thus, when the intravascular blood pump is introduced into the patient's body, proximal refers to that which is relatively closer to the physician, while distal refers to that which is relatively further from the physician.

[0030] 1, a side view of a blood pump 100 is shown. The blood pump 100 is designed as an intravascular blood pump and is deployed within a patient's body via a catheter 104 in a well-known manner. The blood pump 100 includes a pump housing 10, a catheter 104, and a cannula 102. The catheter 104 is attached to a proximal end portion 16 of the pump housing 10, and the cannula is attached to a distal end portion 12 of the pump housing 10.

[0031] The illustrated intravascular blood pump 100 is used as a left ventricular assist device and is introduced percutaneously through the patient's vascular system during a cardiac procedure. Once installed, the cannula 102 passes through the aortic valve to reach the left ventricle of the heart. The pump housing 10 is located outside the aortic valve in the aorta. A pump element 62 in the form of an impeller is driven by a motor, not shown, and rotates within the pump housing 10 to generate suction pressure. Thus, as is commonly known, blood is pumped out of the left ventricle by entering the inlet 106 of the cannula 102 and exiting the pump housing 10 via a plurality of second blood flow openings 20 in the form of blood flow outlets 20.

[0032] 2 and 3 show the pump housing 10. As shown, the intermediate portion 18 extends between the distal end portion 12 and the proximal end portion 16, and the pump housing 10 has a generally cylindrical shape. The proximal end portion 16 has a smaller diameter than the intermediate portion 18. Thus, the intermediate portion 18 tapers toward the proximal end portion 16. The proximal end portion includes a catheter mounting portion 64 and has an outer circumferential surface 50 configured to support a catheter 104. The pump housing 10 has a central longitudinal axis LA, and the terms "radial," "axial," and the like, as used herein, are relative to the longitudinal axis LA of the pump housing 10.

[0033] Distal end portion 12 includes a cannula mounting portion 30 having an outer circumferential surface 60 configured to support a cannula 102. Cannula mounting portion 30 has a slightly smaller diameter than intermediate portion 18. As shown in FIG. 1, the outer circumferential surface of cannula 102 is flush with outer circumferential surface 24 of intermediate portion 18 when cannula 102 is supported in cannula mounting portion 30.

[0034] In the illustrated embodiment, the intermediate portion 18 includes a total of six blood flow outlets 20, which are evenly distributed around the circumference of the pump housing 10. Blood enters the pump housing 10 through a first blood flow opening 14 located at an axial end of the distal end portion 12. Thus, in this embodiment, the first blood flow opening is the blood flow inlet 14. A support member 34 is disposed within the distal end portion 12. In the illustrated embodiment, the support member 34 includes a bearing support portion 38 and three arm portions 36a, 36b, and 36c. The bearing support portion 38 is concentric with the distal end portion 12 and the longitudinal axis LA. The bearing support portion 38 is configured to support the impeller 62 in a well-known manner.

[0035] Arm portions 36a, 36b, and 36c each extend radially inward from cannula mounting portion 30. As shown, arm portions 36a, 36b, and 36c and bearing support portion 38 are integrally formed with distal end portion 12. Of course, all or portions of support member 34 may also be formed separately from distal end portion 12. Although the illustrated embodiment includes three arm portions 36a, 36b, and 36c, support member 34 may include only two arm portions, or more than three arm portions.

[0036] Additionally, the bearing support portion 38 includes an axial end 40 that faces the blood flow inlet 14. The axial end 40 is not flush with the distal end portion 12 or the blood flow inlet 14, respectively, but is displaced axially inward in a direction from the blood flow inlet 14 towards the intermediate portion 18, see also FIG. 4. Recessing the bearing support portion 38 reduces turbulence in the blood flow entering the pump housing 10 via the blood flow inlet 14.

[0037] As shown in Fig. 4, the arm portions 36a, 36b, and 36c expand radially in the axial direction such that the radially outer end of each arm portion 36a, 36b, and 36c has a greater axial extension than the radially inner end, where the radially outer end of each arm portion 36a, 36b, and 36c is the end where the arm portion 36a, 36b, and 36c is connected to the cannula mounting portion 30, and the radially inner end of each arm portion 36a, 36b, and 36c is the end where the arm portion 36a, 36b, and 36c is connected to the bearing support portion 38. Thus, each of the arm portions 36a, 36b, and 36c has a tapered shape at the axial end facing the blood inlet 14 and a straight shape at the opposite axial end. Additionally, one of the arm portions 36a includes a thickened portion 28 at its radially outer end, which will be described in more detail below.

[0038] As can be seen in Figures 1, 2, 3 and 5, the pump housing 10 includes a first sensor 22 arranged on the outer circumferential surface 24 of the intermediate portion 18. Here, the first sensor 22 is an optical sensor intended to sense at least one parameter, in particular the aortic pressure. As shown, the first sensor 22 is arranged between the blood flow outlet 20 and the distal end portion 12. The first sensor 22 is arranged in a recess and includes a first axial end 44 and a second axial end 46. The first axial end 44 of the first sensor 22 faces towards the distal end portion 12 and the second axial end 46 faces towards the proximal end portion 16.

[0039] The first sensor 22 has a cylindrical shape and is oriented parallel to the longitudinal axis LA of the pump housing 10. The outer peripheral surface 24 of the intermediate portion 18 further includes a partially circumferential slot 68 into which the first axial end 44 of the first sensor 22 opens. The slot 68 includes a through hole 70 that reaches through the pump housing 10. The first sensor 22 is covered by a shield 66 that protects the first sensor 22 from damage. The slot 68 and the through hole 70 ensure sufficient blood exchange so that blood does not pool in front of the first axial end 44 of the first sensor 22, which could otherwise lead to inaccurate sensing of the parameter.

[0040] A first elongated transmission 42 in the form of an optical fiber is connected to a second axial end 46 of the first sensor 22. The first optical fiber 42 is disposed in a first channel 48 extending from the intermediate portion 18 to the proximal end portion 16. In particular, the first channel 48 is recessed from the outer circumferential surface 24 of the intermediate portion 18 and from the outer circumferential surface 50 of the proximal end portion 16. The first channel 48 is lined with resin, so that the first optical fiber 42 is fixed within the first channel 48. The first optical fiber 42 is thus guided within the first channel 48 to the end of the proximal end portion 16. There, the first channel 48 opens into the catheter 104, and the first optical fiber 42 is further guided within the catheter 104 in a known manner.

[0041] Figure 6 is a cross-sectional view of the pump housing 10 through the arm portion 36a. As can be seen from Figure 6, the pump housing 10 includes, in addition to the first sensor 22, a second sensor 26 which senses a further parameter, in particular the pressure at the blood inlet 14, i.e. the suction pressure. In this embodiment, the second sensor 26 is identical to the first sensor 22 and is an optical sensor. Of course, the second sensor 26 may differ from the first sensor 22, if necessary and meaningful.

[0042] The second sensor 26 is cylindrical and includes a first axial end 52 and a second axial end 54. The second sensor 26 is disposed in the distal end portion 12. In particular, the second sensor 26 is disposed in the thickened portion 28 of the arm portion 36a, see Figs. 4 and 6. The thickened portion 28 thus includes a support recess 32 that supports the second sensor 26, such that the first axial end 52 of the second sensor 26 is flush with the blood inlet 14. The second sensor 26 is thus disposed to ensure that the suction pressure is sensed directly at the blood inlet 14.

[0043] The thickened portion 28 tapers axially from the blood flow inlet 14 to the intermediate portion 18, see FIG. 4. Thus, the thickened portion 28 has a greater elongation near the blood flow inlet 14 to provide secure support for the second sensor 26 and a lesser elongation in a direction toward the intermediate portion 18. By tapering the thickened portion 28 axially, turbulence in the blood flow entering the pump housing 10 through the blood flow inlet 14 may be reduced. Furthermore, due to the reduced axial elongation of the second sensor 26, a uniform thickness of the thickened portion 28 is not required.

[0044] The second sensor 26 is disposed in the support recess 32 and is tilted with respect to the longitudinal axis LA of the pump housing 10. As shown in Figure 6, the second sensor 26 is tilted because the second axial end 54 of the second sensor 26 is farther from the longitudinal axis LA of the pump housing 10 than the first axial end 52 of the second sensor 26.

[0045] A second elongated transmission 56 in the form of an optical fiber is connected to the second axial end 54 of the second sensor 26. A second channel 58 extends from the distal end portion 12, over the intermediate portion 18 to the proximal end portion 16, see also FIG. 2. The second channel 58 is recessed from the outer circumferential surface 60 of the distal end portion 12, the outer circumferential surface 24 of the intermediate portion 18 and the outer circumferential surface 50 of the proximal end portion 16. The second channel 58 is connected to the support recess 32 and the second optical fiber 56 is disposed in the second channel 58. The second channel 58 is lined with resin, so that the second optical fiber 56 is fixed in the second channel 58. The second optical fiber 56 is thus reliably guided in the second channel 58 from the distal end portion 12 to the proximal end portion 16, where the second channel 58 opens into the catheter 104. The second optical fiber 56 is then guided through a catheter 104 in a manner well known in the art.

[0046] 2, both the first channel 48 and the second channel 58 are recessed from the outer circumferential surface 24 of the intermediate portion 18 and taper into the proximal end portion 16. The first channel 48 and the second channel 58 are lined with resin to prevent the first optical fiber 42 and the second optical fiber 56 from falling out.

[0047] In contrast to the first sensor 22, the second sensor 26 is not covered by a shield. When the blood pump 100 is assembled, the second sensor 26 is disposed radially inward of the cannula 102, thereby preventing the second sensor 26 from falling out of the pump housing 10.

[0048] When the blood pump 100 is properly installed as a left ventricular assist device, blood flow entering the blood inlet 14 of the pump housing 10 through the cannula 102 passes through the second sensor 26. Thus, the second sensor 26 can reliably sense the suction pressure. Blood ejected from the left ventricle, in the blood pump 100, passes through the blood outlet 20 of the pump housing 10 into the aorta and passes through the first sensor 22. Thus, the first sensor 22 can reliably sense the aortic pressure. In essence, the blood pump 100 allows for direct detection of malfunctions and suction events that are critical to the health of the patient.

[0049] Exemplary Implementations As previously mentioned, the techniques described herein may be implemented in a variety of ways. In that regard, the foregoing disclosure is intended to include, but is not limited to, the systems, methods, and combinations and subcombinations thereof described in the following exemplary implementations. Preferred embodiments are described in the following sections.

[0050] Term A1 A pump housing (10) for a blood pump (100), comprising: a distal end portion (12) having a first blood flow opening (14); a proximal end portion (16); an intermediate portion (18) extending axially between the distal end portion (12) and the proximal end portion (16), the intermediate portion (18) having at least one second blood flow opening (20); a first sensor (22) for sensing at least one parameter, in particular aortic pressure; wherein the first sensor (22) is disposed on an outer circumferential surface (24) of the intermediate portion (18); the pump housing (10) includes a second sensor (26) disposed on the distal end portion (12) for sensing at least one parameter, in particular pressure at the first blood flow opening; Pump housing(10).

[0051] Term A2 the distal end portion (12) includes a thickened portion (28) that extends radially inward from the distal end portion (12), the second sensor (26) is disposed within the thickened portion (28), and the distal end portion (12) preferably includes a cannula mounting portion (30), the thickened portion (28) extending radially inward from the cannula mounting portion (30); A pump housing (10) according to paragraph A1.

[0052] Section A3 The thickened portion (28) includes a support recess (32), and the second sensor (26) is disposed within the support recess (32). A pump housing (10) as described in paragraph A2.

[0053] Section A4 The thickened portion (28) tapers axially from the first blood flow opening (14) to the intermediate portion (18). A pump housing (10) according to paragraph A2 or A3.

[0054] Section A5 A support member (34) having at least two arm portions (36a-36c) is disposed within the distal end portion (12), one of the arm portions (36a) including a thickened portion (28); A pump housing (10) according to any one of claims A2 to A4.

[0055] Section A6 the support member (34) includes a bearing support portion (38) concentric with the distal end portion (12), the arm portions (36a-36c) being connected to the bearing support portion (38), the bearing support portion (38) preferably having an axial end portion (40) facing the first blood flow opening (14), the axial end portion (40) of the bearing support portion (38) preferably being displaced axially inward from the first blood flow opening (14) towards the intermediate portion (18); A pump housing (10) according to paragraph A5.

[0056] Section A7 the pump housing (10) further includes a first elongated transmission (42), the first sensor (22) includes a first axial end (44) and a second axial end (46), the first elongated transmission (42) is coupled to the second axial end (46) of the first sensor (22), the first elongated transmission (42) extends to the proximal end portion (16) of the pump housing (10), the first elongated transmission (42) being preferably a cable, fiber, or light guide; A pump housing (10) according to any one of claims A1 to A6.

[0057] Section A8 The pump housing (10) further includes a first channel (48) extending between the intermediate portion (18) and the proximal end portion (16) of the pump housing (10), the first elongated transmission (42) being disposed within the first channel (48), the first channel (48) preferably being recessed from the outer circumferential surface (24) of the intermediate portion (18) and the outer circumferential surface (50) of the proximal end portion (16) of the pump housing (10), and the first channel (48) preferably being lined with resin such that the first elongated transmission (42) is secured within the first channel (48); A pump housing (10) according to paragraph A7.

[0058] Section A9 the second sensor (26) includes a first axial end (52) and a second axial end (54), the first axial end (52) of the second sensor (26) being radially flush with the first blood flow opening (14); A pump housing (10) according to any one of claims A1 to A8.

[0059] Section A10 the pump housing (10) further includes a second elongated transmission (56), the second elongated transmission (56) coupled to the second axial end (54) of the second sensor (26), the second elongated transmission (56) extending to the proximal end portion (16) of the pump housing (10), the second elongated transmission (56) being preferably a cable, fiber, or light guide; A pump housing (10) according to paragraph A9.

[0060] Section A11 The pump housing (10) further includes a second channel (58) extending between the distal end portion (12) and the proximal end portion (16) of the pump housing (10), the second elongated transmission (56) being disposed in the second channel (58). A pump housing (10) according to paragraph A10.

[0061] Section A12 the distal end portion (12) of the pump housing (10) includes an outer circumferential surface (60), the proximal end portion (16) of the pump housing (10) includes an outer circumferential surface (50), a second channel (58) is recessed from the outer circumferential surfaces (24, 50, 60) of the distal end portion (12), the intermediate portion (18), and the proximal end portion (16) of the pump housing (10), the second channel (58) being preferably lined with resin such that a second elongated transmission (56) is secured within the second channel (58); A pump housing (10) according to paragraph A11.

[0062] Section A13 The proximal end portion (16) of the pump housing (10) has a smaller diameter than the intermediate portion (18) of the pump housing (10), and the intermediate portion (18) of the pump housing (10) tapers toward the proximal end portion (16) of the pump housing (10). A pump housing (10) according to any one of paragraphs A1 to A12.

[0063] Section A14 the first sensor (22) is an optical sensor and / or the second sensor (26) is an optical sensor; A pump housing (10) according to any one of paragraphs A1 to A13.

[0064] Section A15 The pump housing (10) has a longitudinal axis (LA), and the second sensor (26) is inclined relative to the longitudinal axis (LA) of the pump housing (10). A pump housing (10) according to any one of claims A1 to A14.

[0065] Section A16 The second sensor (26) is gradually inclined from the distal end portion (12) toward the intermediate portion (18) relative to the longitudinal axis (LA) of the pump housing (10). A pump housing (10) according to paragraph A15.

[0066] Section A17 The pump housing (10) includes a shield (66), and the shield (66) is disposed radially outward of the first sensor (22), such that the shield (66) shields the first sensor (22); A pump housing (10) according to any one of paragraphs A1 to A16.

[0067] Section A18 the intermediate portion (18) of the pump housing (10) includes a partially circumferential slot (68), and the first sensor (22) is disposed adjacent to the slot (68) or the first sensor (22) is disposed at least partially within the slot (68); A pump housing (10) according to any one of paragraphs A1 to A17.

[0068] Section A19 The through hole (70) passes through the slot (68) in the pump housing (10). A pump housing (10) according to paragraph A18.

[0069] Section A20 A blood pump (100) including a pump housing (10) according to any one of paragraphs A1 to A19, the blood pump (100) being preferably a catheter pump or an intravascular blood pump.

[0070] Section A21 The blood pump (100) includes a cannula (102) disposed partially on the distal end portion (12), and a second sensor (26) disposed radially inward of the cannula (102). A blood pump (100) according to paragraph A20.

[0071] Section A22 The blood pump (100) includes a catheter (104), the catheter (104) being partially disposed on the proximal end portion (16), and the first channel (48) and / or the second channel (58) being partially disposed radially inward of the catheter (104); A blood pump (100) according to item A21 or A22. [Explanation of symbols]

[0072] 10 Pump housing 12 Distal end section 14 First blood flow opening / blood flow inlet 16 Proximal end portion 18 Middle part 20 Second blood flow opening / blood flow outlet 22 First Sensor 24 Outer surface of middle part 26 Second Sensor 28 Thickened area 30 Cannula attachment part 32 Support recess 34 Support member 36a Arm part 36b Arm part 36c Arm part 38 Bearing support part 40 Axial end of bearing support portion 42 First elongated transmission device / optical fiber 44 first axial end of first sensor 46 second axial end of first sensor 48 First Channel 50 Outer periphery of proximal end portion 52 first axial end of second sensor 54 second axial end of second sensor 56 Second elongated transmission device / optical fiber 58 Second Channel 60 Outer Circumference of Distal End Portion 62 Pump element / impeller 64 Catheter attachment part 66 Shield 68 Slots 70 through hole 100 Blood Pump 102 Cannula 104 Catheter 106 Entrance LA Longitudinal axis of pump housing

Claims

1. A pump housing (10) for a blood pump (100), comprising: a distal end portion (12) having a first blood flow opening (14); a proximal end portion (16); an intermediate portion (18) extending axially between the distal end portion (12) and the proximal end portion (16), the intermediate portion (18) having at least one second blood flow opening (20); a first sensor (22) for sensing at least one parameter, in particular aortic pressure; wherein the first sensor (22) is disposed on the outer circumferential surface (24) of the intermediate portion (18); the pump housing (10) includes a second sensor (26) disposed on the distal end portion (12) for sensing at least one parameter, in particular pressure at the first blood flow opening; Pump housing (10).

2. the distal end portion (12) includes a thickened portion (28) extending radially inward from the distal end portion (12), the second sensor (26) is disposed within the thickened portion (28), and the distal end portion (12) preferably includes a cannula mounting portion (30), the thickened portion (28) extending radially inward from the cannula mounting portion (30); The pump housing (10) of claim 1.

3. The thickened portion (28) includes a support recess (32), and the second sensor (26) is disposed within the support recess (32). A pump housing (10) according to claim 2.

4. the thickened portion (28) tapers axially from the first blood flow opening (14) to the intermediate portion (18); A pump housing (10) according to claim 2.

5. A support member (34) having at least two arm portions (36a-36c) is disposed within said distal end portion (12), one of said arm portions (36a) including said thickened portion (28); A pump housing (10) according to claim 2.

6. the support member (34) includes a bearing support portion (38) concentric with the distal end portion (12), the arm portions (36a-36c) are connected to the bearing support portion (38), the bearing support portion (38) preferably having an axial end (40) facing the first blood flow opening (14), the axial end (40) of the bearing support portion (38) preferably being displaced axially inward from the first blood flow opening (14) towards the intermediate portion (18); A pump housing (10) according to claim 5.

7. the pump housing (10) further includes a first elongated transmission (42), the first sensor (22) includes a first axial end (44) and a second axial end (46), the first elongated transmission (42) is coupled to the second axial end (46) of the first sensor (22), the first elongated transmission (42) extends to the proximal end portion (16) of the pump housing (10), and the first elongated transmission (42) is preferably a cable, fiber, or light guide; A pump housing (10) according to any one of claims 1 to 6.

8. the pump housing (10) further includes a first channel (48) extending between the intermediate portion (18) and the proximal end portion (16) of the pump housing (10), the first elongated transmission device (42) being disposed within the first channel (48), the first channel (48) preferably being recessed from the outer circumferential surface (24) of the intermediate portion (18) and the outer circumferential surface (50) of the proximal end portion (16) of the pump housing (10), and the first channel (48) preferably being lined with resin such that the first elongated transmission device (42) is secured within the first channel (48); A pump housing (10) according to claim 7.

9. the second sensor (26) includes a first axial end (52) and a second axial end (54), the first axial end (52) of the second sensor (26) being radially flush with the first blood flow opening (14); A pump housing (10) according to any one of claims 1 to 6.

10. the pump housing (10) further includes a second elongated transmission (56), the second elongated transmission (56) coupled to the second axial end (54) of the second sensor (26), the second elongated transmission (56) extending to the proximal end portion (16) of the pump housing (10), the second elongated transmission (56) being preferably a cable, fiber, or optical guide; A pump housing (10) according to claim 9.

11. The pump housing (10) further includes a second channel (58) extending between the distal end portion (12) and the proximal end portion (16) of the pump housing (10), and the second elongated transmission (56) is disposed in the second channel (58). A pump housing (10) according to claim 10.

12. the distal end portion (12) of the pump housing includes an outer circumferential surface (60), the proximal end portion (16) of the pump housing (10) includes an outer circumferential surface (50), the second channel (58) is recessed from the outer circumferential surfaces (24, 50, 60) of the distal end portion (12), the intermediate portion (18), and the proximal end portion (16) of the pump housing (10), the second channel (58) preferably being lined with resin such that the second elongated transmission (56) is secured within the second channel (58); A pump housing (10) according to claim 11.

13. The proximal end portion (16) of the pump housing (10) has a smaller diameter than the intermediate portion (18) of the pump housing (10), and the intermediate portion (18) of the pump housing (10) tapers toward the proximal end portion (16) of the pump housing (10). A pump housing (10) according to any one of claims 1 to 6.

14. the first sensor (22) is an optical sensor and / or the second sensor (26) is an optical sensor; A pump housing (10) according to any one of claims 1 to 6.

15. A blood pump (100) comprising a pump housing (10) according to any one of claims 1 to 6, preferably a catheter pump or an intravascular blood pump.

Images