Needle handle with vacuum chamber

A method comprising:

• moving a stylet in a proximal direction relative to a handle of a medical device,
• wherein the stylet applies a proximal force to a plunger device located within a chamber of the handle,
• wherein the moving of the plunger device occurs in a proximal direction relative to the chamber,
• wherein the plunger device is disposed around the stylet within the chamber,
• the plunger device includes an outer edge in sealing contact with an inner wall of the chamber,
• the outer edge of the plunger device provides a separation between a first volume of space within the chamber and a second volume of space within the chamber,
• the first volume of space being distal from the plunger device and the second volume the space being proximal from the plunger device;
• and moving the plunger device proximally to reduce pressure at a distal end of at least one of the medical device or the stylet,
• wherein the plunger device includes a first tab attached to the stylet and a plunger configured to seal with an inner wall of the chamber and wherein moving the plunger device includes:
• moving the first tab into contact with the plunger;
• and simultaneously moving the first tab and the plunger in the proximal direction.

A method comprising:

• moving a stylet in a proximal direction relative to a handle of a medical device,
• wherein the stylet applies a proximal force to a plunger device located within a chamber of the handle,
• wherein the moving of the plunger device occurs in a proximal direction relative to the chamber,
• wherein the plunger device provides a separation between a first volume of space within the chamber and a second volume of space within the chamber,
• the first volume of space being distal from the plunger device and the second volume the space being proximal from the plunger device;
• and reducing pressure at a distal end of at least one of the medical device or the stylet based on proximal motion of the plunger device;
• wherein the plunger device comprises:
• a balloon attached to the stylet at first and second locations;
• a first port located on the stylet between the first and second locations;
• a second port located at or adjacent to a proximal end of the stylet;
• and a lumen configured to connect the first port and the second port,
• wherein moving the plunger device further comprises:
• inflating the balloon using an air source coupled to the second port;
• and moving the balloon in the proximal direction.

An apparatus comprising:

• a medical device having a distal end and a proximal end, the medical device comprising a lumen;
• a stylet having a distal end and a proximal end,
• the stylet further comprising a port and a stylet lumen that extends from the proximal end of the stylet to the port;
• a handle comprising:
• an actuator connected to the proximal end of the medical device;
• and a chamber portion connected to the actuator,
• the chamber portion comprising a volume of space configured to volumetrically connect to the lumen of the medical device via the actuator;
• a plunger device disposed around the stylet within the chamber portion and including an outer edge in sealing contact with an inner wall of the chamber portion,
• the outer edge of the plunger device operable to pneumatically isolate a proximal portion of a volume of air within the chamber portion from a distal portion of the volume of air within the chamber portion,
• the plunger device further comprising an inflatable balloon attached to the stylet around the port;
• and at least one of a gas or a fluid source configured to supply a gas or a fluid into the inflatable balloon via the stylet lumen and the port,
• wherein when the inflatable balloon is in an inflated state,
• a portion of an outer surface of the balloon makes at least one of a pneumatic or fluidic seal with an inner wall of the chamber portion,
• wherein proximal motion of the stylet causes proximal motion of the plunger device resulting in reduced pressure at the distal end of at least one of the medical device or the stylet.