Methods and systems for establishing retrograde carotid arterial blood flow

Patent metadata

Field	Value
Publication number	US-11364332-B2
Application number	US-201916377663-A
Country	US
Kind code	B2
Filing date	Apr 8, 2019
Priority date	Jul 18, 2007
Publication date	Jun 21, 2022
Grant date	Jun 21, 2022

Abstract

Interventional procedures on the carotid arteries are performed through a transcervical access while retrograde blood flow is established from the internal carotid artery to a venous or external location. A system for use in accessing and treating a carotid artery includes an arterial access device, a shunt fluidly connected to the arterial access device, and a flow control assembly coupled to the shunt and adapted to regulate blood flow through the shunt between at least a first blood flow state and at least a second blood flow state. The flow control assembly includes one or more components that interact with the blood flow through the shunt.

First claim

What is claimed is:

1. A carotid artery lesion treatment system, comprising:
an arterial access sheath configured for placement into a common carotid artery at an insertion site in a patient's neck;
a blood-flow block configured to be inserted via the arterial access sheath into the common carotid artery and to block blood flow in at least a portion of the common carotid artery to establish retrograde blood flow through the common carotid artery such that blood flows into a lumen of the arterial access sheath;
an extracorporeal shunt configured to allow the retrograde blood flow to pass from the common carotid artery to a femoral vein of the patient;
wherein the access sheath is configured to allow deploying a stent to the lesion, and wherein the arterial access sheath includes a proximal extension and a proximal hemostasis device at a proximal end of the proximal extension, and wherein the proximal extension has a length sufficient to space the hemostasis device a distance away from a insertion site such that a clinician can introduce a treatment device into the proximal extension and sheath while lessening radiation exposure to the clinician when fluoroscopy is being performed.

2. The carotid artery lesion treatment system of claim 1 , wherein extracorporeal shunt has a length and an inner diameter, and wherein a ratio of the length to the inner diameter of the shunt is in the range of 84 to 147.

3. The carotid artery lesion treatment system of claim 1 , wherein the access sheath has a length sufficient to space a hemostasis device a distance away from the insertion site such that a clinician can introduce a treatment device into the sheath while lessening radiation exposure to the clinician when fluoroscopy is being performed.

4. The carotid artery lesion treatment system of claim 1 , further comprising a filter that is configured to be deployed in the arterial blood system at a location distal of the lesion.

5. The carotid artery lesion treatment system of claim 1 , wherein the arterial access sheath comprises a working length of 5 cm to 15 cm.

6. The carotid artery lesion treatment system of claim 1 , wherein the extracorporeal shunt includes a stopcock.

7. The carotid artery lesion treatment system of claim 6 , wherein the extracorporeal shunt includes a filter.

8. The carotid artery lesion treatment system of claim 1 , wherein the shunt has a length of 40 cm to 70 cm.

9. The carotid artery lesion treatment system of claim 1 , wherein the shunt has an internal diameter of 4.76 mm.

10. A carotid artery lesion treatment system, comprising:
an arterial access sheath configured for placement into a common carotid artery at an insertion site in a patient's neck;
a blood-flow block configured to be inserted via the arterial access sheath into the common carotid artery and to block blood flow in at least a portion of the common carotid artery to establish retrograde blood flow through the common carotid artery such that blood flows into a lumen of the arterial access sheath;
an extracorporeal shunt configured to allow the retrograde blood flow to pass from the common carotid artery to a femoral vein of the patient, wherein the extracorporeal shunt includes a stopcock and a filter;
wherein the access sheath is configured to allow deploying a stent to the lesion, and wherein the arterial access sheath includes a proximal extension and a proximal hemostasis device at a proximal end of the proximal extension, and wherein the proximal extension has a length sufficient to space the hemostasis device a distance away from the insertion site such that a clinician can introduce a treatment device into the proximal extension and sheath while lessening radiation exposure to the clinician when fluoroscopy is being performed.

11. The carotid artery lesion treatment system of claim 10 , wherein extracorporeal shunt has a length and an inner diameter, and wherein a ratio of the length to the inner diameter of the shunt is in the range of 84 to 147.

12. The carotid artery lesion treatment system of claim 10 , wherein the access sheath has a length sufficient to space a hemostasis device a distance away from the insertion site such that a clinician can introduce a treatment device into the sheath while lessening radiation exposure to the clinician when fluoroscopy is being performed.

13. The carotid artery lesion treatment system of claim 10 , further comprising deploying a filter in the arterial blood system at a location distal of the lesion.

14. The carotid artery lesion treatment system of claim 10 , wherein the arterial access sheath comprises a working length of 5 cm to 15 cm.

15. The carotid artery lesion treatment system of claim 10 , wherein the shunt has a length of 40 cm to 70 cm.

16. The carotid artery lesion treatment system of claim 10 , wherein the shunt has an internal diameter of 4.76 mm.

Assignees

• Silk Road Medical Inc

Inventors

• Criado Enrique
• Chou Tony M
• Garrison Michi E
• Hyde Gregory M
• Schaer Alan
• Renati Richard

Classifications

• A61M2205/3331

  Pressure; Flow · CPC title

• A61F2/90

  characterised by a net-like or mesh-like structure · CPC title

• A61M25/10

  Balloon catheters ({A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02;} inflatable balloons for placing stents or stent-grafts A61F2/958 {; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00}) · CPC title

• A61B2017/00778

  Operations on blood vessels (A61B2017/22097, A61B2017/320741 take precedence) · CPC title

• A61F2002/065

  Y-shaped blood vessels · CPC title