A medical device comprising: a hub that defines a hub lumen that extends from a proximal portion of the hub to a distal portion of the hub and a longitudinal axis extending from a proximal end of the hub to a distal end of the hub at a centerline of the hub lumen, wherein an outer surface of the distal portion of the hub tapers inwardly toward the longitudinal axis as the distal portion extends distally; and a strain relief positioned over the distal portion of the hub, wherein the strain relief comprises a proximal portion configured to receive the distal portion of the hub within the strain relief, wherein the strain relief defines a strain relief lumen that substantially aligns with the hub lumen when the proximal portion of the strain relief receives the distal portion of the hub, wherein at least one of the hub or the strain relief are configured to securely receive a proximal end of a catheter body such that a catheter body lumen of the catheter body substantially aligns with the hub lumen when the strain relief receives the distal portion of the hub, wherein the strain relief lumen shares the longitudinal axis of the hub when the proximal portion of the strain relief receives the distal portion of the hub, wherein both an outer surface of the strain relief and an outer surface of a medial portion of the hub define a substantially similar distance to the longitudinal axis along an interface between the outer surface of the strain relief and the outer surface of the medial portion of the hub, wherein an inner surface of the proximal portion of the strain relief defines a cavity configured to receive the distal portion of the hub, characterized in that the inner surface of the proximal portion of the strain relief tapers inward toward the longitudinal axis as the cavity extends distally, and wherein the inner surface of the proximal portion of the strain relief tapers inwardly with a relatively greater slope than the distal portion of the hub as the distal portion tapers inwardly to define an interference fit between the outer surface of the distal portion of the hub and the inner surface of the proximal portion of the strain relief. a hub that defines a hub lumen that extends from a proximal portion of the hub to a distal portion of the hub and a longitudinal axis extending from a proximal end of the hub to a distal end of the hub at a centerline of the hub lumen, wherein an outer surface of the distal portion of the hub tapers inwardly toward the longitudinal axis as the distal portion extends distally; and a strain relief positioned over the distal portion of the hub, wherein the strain relief comprises a proximal portion configured to receive the distal portion of the hub within the strain relief, wherein the strain relief defines a strain relief lumen that substantially aligns with the hub lumen when the proximal portion of the strain relief receives the distal portion of the hub, wherein at least one of the hub or the strain relief are configured to securely receive a proximal end of a catheter body such that a catheter body lumen of the catheter body substantially aligns with the hub lumen when the strain relief receives the distal portion of the hub, wherein the strain relief lumen shares the longitudinal axis of the hub when the proximal portion of the strain relief receives the distal portion of the hub, wherein both an outer surface of the strain relief and an outer surface of a medial portion of the hub define a substantially similar distance to the longitudinal axis along an interface between the outer surface of the strain relief and the outer surface of the medial portion of the hub, wherein an inner surface of the proximal portion of the strain relief defines a cavity configured to receive the distal portion of the hub, characterized in that the inner surface of the proximal portion of the strain relief tapers inward toward the longitudinal axis as the cavity extends distally, and wherein the inner surface of the proximal portion of the strain relief tapers inwardly with a relatively greater slope than the distal portion of the hub as the distal portion tapers inwardly to define an interference fit between the outer surface of the distal portion of the hub and the inner surface of the proximal portion of the strain relief.