Infusion pump with tube spike holder
First Claim
1. An infusion pump for infusing intravenous solution from a bag through intravenous tubing into a patient, the bag having a flexible sidewall which at least partially encloses an interior chamber to contain the solution, the bag further having a dispensing port for releasable connection with an end of the tubing, the infusion pump comprising the combination of:
- a housing having a compartment for removably receiving and supporting the bag in a solution-dispensing position;
a bladder having a flexible wall which moves by expansion and contraction responsive to respective increase and decrease in the pressure of a fluid within the bladder;
means for mounting the bladder within the housing in a position for applying a pushing force against the sidewall of the bag to collapse the bag responsive to expansion of the bladder wall whereby solution within the chamber in the bag is infused out through the dispensing port;
pump means for pumping fluid into the bladder to increase said pressure in an effective amount to cause said collapse of the bag;
pressure sensor means for generating an electrical signal representing fluid pressure responsive to said expansion and contraction movement of the bladder wall for indirectly sensing said pressure of the fluid within the bladder; and
control means for controlling the pump means between a fluid pumping mode and an off mode responsive to said electrical signal.
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Accused Products
Abstract
An infusion pump for infusing solutions from IV bags through tubing to patients. The pump comprises a housing having a compartment which receives an IV bag in a solution-dispensing position. The bag is placed over a bladder within the compartment, and the bladder is expanded by a pressurized fluid to apply a pushing force against the bag which collapses to infuse solution through the tubing. A pump in the housing pumps a fluid such as air into the bladder under influence of a control circuit. A pressure sensor indirectly senses pressure of fluid in the bladder through a pressure of pad which contacts the bladder wall. A control circuit generates a pressure signal responsive to movement of the pressure pad for operating a valve which directs fluid between the pump and bladder. A dispensing spike is provided for interconnecting a dispensing port of the bag in fluid communication with the tubing. The spike is formed with an annulus which cooperates with a wall of the housing to prevent unintended withdrawal of the spike from a dispensing port while infusion takes place. The annulus also operates a switch which is connected in the control circuit to ensure that infusion proceeds only when the bag is in its proper solution-dispensing position in the housing.
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Citations
23 Claims
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1. An infusion pump for infusing intravenous solution from a bag through intravenous tubing into a patient, the bag having a flexible sidewall which at least partially encloses an interior chamber to contain the solution, the bag further having a dispensing port for releasable connection with an end of the tubing, the infusion pump comprising the combination of:
- a housing having a compartment for removably receiving and supporting the bag in a solution-dispensing position;
a bladder having a flexible wall which moves by expansion and contraction responsive to respective increase and decrease in the pressure of a fluid within the bladder;
means for mounting the bladder within the housing in a position for applying a pushing force against the sidewall of the bag to collapse the bag responsive to expansion of the bladder wall whereby solution within the chamber in the bag is infused out through the dispensing port;
pump means for pumping fluid into the bladder to increase said pressure in an effective amount to cause said collapse of the bag;
pressure sensor means for generating an electrical signal representing fluid pressure responsive to said expansion and contraction movement of the bladder wall for indirectly sensing said pressure of the fluid within the bladder; and
control means for controlling the pump means between a fluid pumping mode and an off mode responsive to said electrical signal. - View Dependent Claims (2, 3, 4)
- a housing having a compartment for removably receiving and supporting the bag in a solution-dispensing position;
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5. An infusion pump for infusing intravenous solution from a bag through intravenous tubing into a patient, the bag having a flexible sidewall which at least partially encloses an interior chamber to contain the solution, the bag further having a dispensing port for releasable connection with an end of the tubing, the infusion pump comprising the combination of:
- a housing having a compartment for removably receiving and supporting the bag in a solution-dispensing position;
a bladder having a flexible wall which moves by expansion and contraction responsive to respective increase and decrease in the pressure of a fluid within the bladder;
means for mounting the bladder within the housing in a position for applying a pushing force against the sidewall of the bag to collapse the bag responsive to expansion of the bladder wall whereby solution within the chamber in the bag is infused out through the dispensing port;
pump means for pumping fluid into the bladder to increase said pressure in an effective amount to cause said collapse of the bag;
pressure sensor means for generating a fluid pressure signal responsive to said expansion and contraction movement of the bladder wall for indirectly sensing said pressure of the fluid within the bladder; and
control means for controlling the pump means between a fluid pumping mode and an off mode responsive to said fluid signal, said control means comprises signal means for generating a bag-in-place signal when the bag is in said solution-dispensing position, said control means controlling the pump means to the fluid pumping mode only responsive to the bag-in-place signal. - View Dependent Claims (6, 7, 8, 9, 10)
- a housing having a compartment for removably receiving and supporting the bag in a solution-dispensing position;
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11. An infusion pump for infusing intravenous solution from a bag through intravenous tubing into a patient, the bag having a flexible sidewall which at least partially encloses a chamber to contain the solution, the bag further having a dispensing port for releasable connection with an end of the tubing, the infusion pump comprising the combination of:
- a housing having a compartment for removably receiving and supporting the bag in a solution-dispensing position;
operating means for applying a force against the sidewall of the bag to collapse the bag and infuse solution within the chamber out through the dispensing port;
interconnect means for releasably interconnecting said end of the tubing in fluid connection with said chamber in the bag, said interconnect means comprising a dispensing spike, means for releasably connecting the spike with said end of the tubing, said dispensing spike having an annular groove together with an outlet end positioned distally of the groove for connection with said dispensing port of the bag;
said housing having a structure positioned in register with said annular groove when the outlet end of the spike is connected with the dispensing port; and
means for moving said structure into and out of lockable relationship with said annular groove. - View Dependent Claims (12)
- a housing having a compartment for removably receiving and supporting the bag in a solution-dispensing position;
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13. An infusion pump for infusing intravenous solution from a bag through intravenous tubing into a patient, the bag having a flexible sidewall which at least partially encloses a chamber to contain the solution, the bag further having a dispensing port for releasable connection with an end of the tubing, the infusion pump comprising the combination of:
- a housing having a compartment for removably receiving and supporting the bag in a solution-dispensing position;
operating means for applying a force against the sidewall of the bag to collapse the bag and infuse solution within the chamber out through the dispensing port;
interconnect means for releasable interconnecting said end of the tubing in fluid communication with said chamber in the bag, said interconnect means comprising a dispensing spike, said dispensing spike having means for releasably connecting the spike with said end of the tubing, said dispensing spike when connected with the end of the tubing being in a set position relative to the housing when the bag is in its solution-dispensing position; and
control means for enabling said operating means to apply said force responsive to the dispensing spike being in its set position. - View Dependent Claims (14, 15, 16)
- a housing having a compartment for removably receiving and supporting the bag in a solution-dispensing position;
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17. An infusion pump for infusing intravenous solution from a bag through intravenous tubing into a patient, the bag having a flexible sidewall which at least partially encloses a chamber to contain the solution, the bag further having a dispensing port for releasable connection with an end of the tubing, the infusion pump comprising the combination of:
- a housing having a compartment for removably receiving and supporting the bag in a solution-dispensing position;
operating means for applying a force against the sidewall of the bag to collapse the bag and infuse solution within the chamber out through the dispensing port;
interconnect means for releasable interconnecting said end of the tubing in fluid communication with said chamber in the bag, said interconnect means comprising a dispensing spike adapted for connection with said end of the tubing, said dispensing spike when connected with the end of the tubing being in a set position relative to the housing when the bag is in its solution-dispensing position; and
control means for enabling said operating means to apply said force responsive to the dispensing spike being in its set position, said control means comprises signal means for generating a bag-in-place signal when the bag is in said solution-dispensing position, said control means enabling said operating means to apply said force only responsive to the bag-in-place signal. - View Dependent Claims (18)
- a housing having a compartment for removably receiving and supporting the bag in a solution-dispensing position;
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19. An infusion pump for infusing intravenous solution from a bag through tubing into a patient, the bag having a flexible sidewall which at least partially encloses an interior chamber to contain a solution, the bag further having a dispensing port, the infusion pump comprising the combination of:
- a housing having a compartment for removably receiving and supporting the bag in a solution-dispensing position, said housing having an opening of a predetermined size;
a bladder having a flexible wall which moves by expansion and contraction responsive to respective increase and decrease in the pressure of a fluid within the bladder;
said bladder being mounted in the housing so that said expansion of the flexible wall applies a pushing force against the sidewall of the bag to collapse the bag responsive to expansion of the bladder wall whereby solution within the chamber in the bag is infused out through the dispensing port;
pump means for pumping fluid into the bladder to increase said pressure in an effective amount to cause such collapse of the bag;
a spike which is sized for fitting within said opening in the housing, said spike including means for releasably connecting the spike with said tubing, a member carried by the spike, said member having a part which, when the spike is fitted within said opening, is positioned within the housing, said part being of a size greater than said predetermined size of the opening to prevent unintended withdrawal of the spike from the housing. - View Dependent Claims (23)
- a housing having a compartment for removably receiving and supporting the bag in a solution-dispensing position, said housing having an opening of a predetermined size;
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20. An infusion pump for infusing intravenous solution from a bag through tubing into a patient, the bag having a flexible sidewall which at least partially encloses an interior chamber to contain a solution, the bag further having a dispensing port, the infusion pump comprising the combination of:
- a housing having a compartment for removably receiving and supporting the bag in a solution-dispensing position, said housing having an opening of a predetermined size;
a bladder having a flexible wall which moves by expansion and contraction responsive to respective increase and decrease in the pressure of a fluid within the bladder;
said bladder being mounted in the housing so that said expansion of the flexible wall applies a pushing force against the sidewall of the bag to collapse the bag responsive to expansion of the bladder wall whereby solution within the chamber in the bag is infused out through the dispensing port;
pump means for pumping fluid into the bladder to increase said pressure in an effective amount to cause such collapse of the bag;
a spike which is sized for fitting within said opening in the housing, a member carried by the spike, said member having a part which, when the spike is fitted within said opening, is positioned within the housing, said part being of a size greater than said predetermined size of the opening to prevent unintended withdrawal of the spike from the housing, a switch carried by the housing and operable from an off mode to an on mode responsive to said port being in said position within the housing, and means for providing a bag-in-place signal responsive to said on mode of the switch. - View Dependent Claims (21, 22)
- a housing having a compartment for removably receiving and supporting the bag in a solution-dispensing position, said housing having an opening of a predetermined size;
Specification