Patent ID: 11918765
Assignee: TELEFLEX MEDICAL INCORPORATED
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. An assembly for accessing a superior vena cava of a patient without visualization of a vasculature of the patient, the assembly comprising:
a stylet including a housing member and an elongated body configured to be inserted through the vasculature of the patient, the elongated body extending from the housing member to a distal tip and including a core wire disposed within a tubular body, the core wire having a pre-formed shape in a first state and a straightened shape in a second state, wherein a potential energy of the core wire in the first state is less than the potential energy of the core wire in the second state, the core wire comprising:
a first portion extending distally from the housing member and having a substantially straight shape in the first state;
a second portion extending distally from the first portion and having a first pre-formed bend in the first state;
a third portion extending distally from the second portion and having a substantially straight shape in the first state;
a fourth portion extending distally from the third portion and having a second pre-formed bend in the first state;
a fifth portion extending distally from the fourth portion to the distal tip, the fifth portion having a substantially straight shape in the first state and including a narrow segment with a reduced width or diameter relative to the first through fourth portions, and a distal segment between the narrow segment and the distal tip, the distal segment having a width or diameter greater than the respective width or diameter of the narrow segment, the narrow segment being configured to increase deflection of the distal tip, and the distal tip having a width or diameter greater than the respective width or diameter of the distal segment; and
a first distal taper with an increasing width or diameter in a distal direction, the first distal taper disposed between the narrow segment and the distal segment, and a second distal taper with an increasing width or diameter in the distal direction, the second distal taper disposed between the distal segment and the distal tip;

wherein the first pre-formed bend and the second pre-formed bend are in the same plane and the same rotational direction,
wherein the first pre-formed bend defines a first angle in the range of 55-70° between a longitudinal axis of the first portion and a longitudinal axis of the third portion,
wherein the second pre-formed bend defines a second angle in the rage of 8- 15° between the longitudinal axis of the third portion and a longitudinal axis of the fifth portion, and
wherein an arc length of the first pre-formed bend is in the range of 3-7 inches.