Infusor with flexible sheath
AssigneeBaxter International Inc.
InventorsMark Bridle, Larry Black
Life of this patent
Estimating the term…
Abstract
An improved ambulatory infusion device for dispensing a fluid into a patient includes a flexible bladder enclosure including a sheath of flexible material having a first open end a closed second end. The first open end of the sheath is affixed to a rigid closure, and a bladder support is secured in fixed position relative to the closure. An elastic bladder is mounted on the bladder support and positioned inside the sheath for holding fluid to be dispensed. The closed second end of the sheath is free to conform to the body of the patient so that the device is comfortable when worn. In other aspects, a flow restrictor and a pressure regulator are provided.
Claims26
An ambulatory infusion device for dispensing a fluid into a patient comprising:
- a bladder enclosure comprising a sheath of flexible material having a first open end defining a mouth and a second closed end, the first open end being affixed to a rigid closure;
- a bladder support secured in fixed position relative to said closure;
- and
- an elastic bladder mounted on the bladder support and positioned inside the sheath for holding the fluid,
- the sheath extending from said closure toward the closed second end of the sheath spaced beyond said bladder, said closed second end of the sheath being free to conform to the body of the patient so that the device is comfortable when worn.
An ambulatory infusion device for dispensing a fluid into a patient comprising:
- a bladder enclosure comprising a sheath of flexible material having a first open end defining a mouth and a second closed end, the first open end being affixed to a rigid closure;
- a bladder support secured in fixed position relative to said closure;
- and
- an elastic bladder mounted on the bladder support and positioned inside the sheath for holding the fluid,
- the sheath extending from said closure toward the closed second end of the sheath spaced beyond said bladder, said closed second end of the sheath being free of attachment to said bladder support to allow for folding of the sheath.
An ambulatory infusion device for dispensing a fluid at a predetermined flow rate comprising:
- a bladder having an interior volume for storing the fluid under pressure;
- a pressure regulator in fluid communication with the bladder;
- a flow restrictor in fluid communication with the pressure regulator and positioned downstream therefrom, the flow restrictor having an inlet for receiving the fluid at an inlet pressure and an outlet for discharging the fluid at an outlet pressure,
- the flow restrictor being formed of flexible tubing having an inside diameter less than about 0.003 inches.
An ambulatory infusion device for dispensing a fluid into a patient comprising:
- a bladder enclosure comprising a sheath of flexible material having a first open end defining a mouth and a second closed end, the first open end being affixed to a rigid closure;
- a bladder support secured in fixed position relative to said closure;
- an elastic bladder mounted on the bladder support, the bladder being positioned inside the sheath and having an interior volume for storing the fluid under pressure,
- the sheath extending from said closure toward the closed second end of the sheath spaced beyond said bladder, said closed second end of the sheath being free to conform to the body of the patient so that the device is comfortable when worn,
- a pressure regulator in fluid communication with the bladder, and
- a flow restrictor in fluid communication with the pressure regulator and positioned downstream therefrom, the flow restrictor having an inlet for receiving the fluid at an inlet pressure and an outlet for discharging the fluid at an outlet pressure.
Dependencies are inferred from the claim text.