Apparatus and methods for ocular injection
First Claim
1. A method, comprising:
- inserting a distal end portion of a puncture member of a medical injector into a target tissue to define a delivery passageway within the target tissue and such that a distal end surface of a hub of the medical injector is in contact with a target surface of the target tissue;
exerting a force on an actuation rod of the medical injector when the distal end surface of the hub is in contact with the target surface, the force having magnitude of less than a threshold value, the force produces movement of a distal end portion of the actuation rod within a medicament container when the distal end portion of the puncture member is disposed within a first region of the target tissue, movement of the distal end portion of the actuation rod within the medicament container being limited when the distal end portion of the puncture member is disposed within a second region of the target tissue; and
conveying, in response to the exerting, a substance from the medicament container into the target tissue via the puncture member when the distal end portion of the puncture member is disposed within the first region of the target tissue.
6 Assignments
0 Petitions
Accused Products
Abstract
An apparatus includes a housing coupled to a medicament container, which is coupled to a needle. An injection assembly is disposed within the housing and includes an energy storage member and an actuation rod. A distal end portion of the actuation rod is disposed within the medicament container. The energy storage member can produce a force on a proximal end portion of the actuation rod sufficient to move the distal end portion of the actuation rod within the medicament container. This can convey at least a portion of a substance from the medicament container via the needle when a distal tip of the needle is disposed within a first region of a target location. The force is insufficient to move the distal end portion of the actuation rod within the medicament container when the distal tip of the needle is disposed within a second region of the target location.
245 Citations
30 Claims
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1. A method, comprising:
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inserting a distal end portion of a puncture member of a medical injector into a target tissue to define a delivery passageway within the target tissue and such that a distal end surface of a hub of the medical injector is in contact with a target surface of the target tissue; exerting a force on an actuation rod of the medical injector when the distal end surface of the hub is in contact with the target surface, the force having magnitude of less than a threshold value, the force produces movement of a distal end portion of the actuation rod within a medicament container when the distal end portion of the puncture member is disposed within a first region of the target tissue, movement of the distal end portion of the actuation rod within the medicament container being limited when the distal end portion of the puncture member is disposed within a second region of the target tissue; and conveying, in response to the exerting, a substance from the medicament container into the target tissue via the puncture member when the distal end portion of the puncture member is disposed within the first region of the target tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method, comprising:
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inserting a distal end portion of a puncture member of a medical injector into a target tissue to define a delivery passageway within the target tissue, the inserting is performed such that a centerline of the puncture member and a surface line tangent to a target surface of the target tissue define an angle of entry of between about 75 degrees and about 105 degrees; placing a distal end surface of a hub of the medical injector into contact with a target surface of the target tissue to fluidically isolate the delivery passageway, the distal end surface of the hub including a convex sealing portion configured to define a substantially fluid-tight seal with the target surface; and conveying, after the placing, a substance into the target tissue via the puncture member. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A method, comprising:
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inserting a distal end portion of a puncture member of a medical injector into an eye to define a delivery passageway within a sclera of the eye and such that a distal end surface of a hub of the medical injector is in contact with a surface of the eye, the puncture member coupled to the hub such that the hub moves with the puncture member during the inserting; and applying, after the inserting, a force to the medical injector such that a substance is conveyed from a medicament container of the medical injector via the puncture member when a distal tip of the puncture member is disposed within at least one of a suprachoroidal space, a lower portion of the sclera, a choroid of the eye, or a subretinal space of the eye, the force being insufficient to convey the substance from the medicament container via the puncture member when the distal tip of the puncture member is disposed within an upper portion of the sclera of the eye. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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28. A method, comprising:
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inserting a distal end portion of a puncture member of a medical injector into an eye to define a delivery passageway within the eye and such that a distal end surface of a hub of the medical injector is in contact with a target surface of the eye, the inserting includes deforming the target surface of the eye with the distal end surface of the hub; exerting a force on an actuation rod of the medical injector when the distal end portion of the puncture member is disposed in the eye, the force having magnitude of less than a threshold value, the medical injector configured such that the force is sufficient to move a distal end portion of the actuation rod within a medicament container when the distal end portion of the puncture member is disposed within a first region of the eye, the medical injector configured such that the force is insufficient to move the distal end portion of the actuation rod within the medicament container when the distal end portion of the puncture member is disposed within a second region of the eye; and defining, in response to the exerting, at least a portion of a suprachoroidal space within the eye when the distal end portion of the puncture member is disposed within the first region. - View Dependent Claims (29, 30)
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Specification