Medical guidewire assembly having predetermined spatial geometry

An apparatus, comprising:

• a medical guidewire assembly configured to be movable, at least in part, through an exit portal of a guidewire introducer, and the exit portal being in fluid communication with an elongated interior channel extending, at least in part, longitudinally along the guidewire introducer, and the exit portal being positionable proximate to a biological wall located within the body of a patient;
• and
• the medical guidewire assembly having a flexible distal shaft section;
• and
• the flexible distal shaft section being configured to extend, at least in part, longitudinally along the elongated interior channel of the guidewire introducer after the flexible distal shaft section is received in, and supported by, the elongated interior channel;
• and
• the flexible distal shaft section also being configured to have a predetermined spatial geometry once the flexible distal shaft section is moved beyond said exit portal, at least in part, from, and unsupported by, the elongated interior channel of the guidewire introducer, wherein the flexible distal shaft section includes a shaft guard portion spaced apart from the piercing stylet device, the shaft guard portion being configured to shield the piercing stylet device when the predetermined spatial geometry is formed;
• and
• the medical guidewire assembly having a piercing stylet device extending from the flexible distal shaft section;
• and
• the piercing stylet device being configured to puncture the biological wall of the patient in response to placement of the exit portal of the guidewire introducer, in use, proximate to the biological wall of the patient, and movement of the flexible distal shaft section through the exit portal toward the biological wall;
• and
• the predetermined spatial geometry of the flexible distal shaft section being configured to prevent, at least in part, physical contact between the piercing stylet device and adjacently positioned tissue of the patient in response to formation of the predetermined spatial geometry by further movement of the flexible distal shaft section through the exit portal of the guidewire introducer after the biological wall is punctured by the piercing stylet device, wherein the predetermined spatial geometry forms a closed loop arrangement and causes the piercing stylet device to make physical contact with the shaft guard portion;
• wherein the predetermined spatial geometry forms the closed loop arrangement configured to prevent a straight line from being drawn to the piercing stylet device without first contacting another portion of the predetermined spatial geometry.