Patent US5127907A successfully refreshed from Google Patents.
US5127907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for eliminating or reducing static electricity in infusion pumping systems
Assignee: Hospira Inc
•
Filing: 1990-12-06
•
Granted: 1992-07-07
•
Expires: 2010-12-06
Abstract
Abstract A system for eliminating or reducing static electricity in infusion pumping systems which may cause artifacts in electrocardiograms is disclosed. Infusion pumping systems deliver prescribed infusates to a patient. Frequently, such infusion systems are used in conjunction with electrocardiogram monitors. Static electricity generated at or by the infusion pumping system may cause artifacts in the electrocardiogram monitor. The present invention reduces or eliminates this static electricity by forming parts in relative motion of a similar material to reduce generation of static electric charges. The pumping piston and diaphragm wall of a pumping chamber may be formed from a similar material. The valve pistons and valve diaphragms may be formed of a similar material. The removable pumping cassette and cassette receiver may be formed from a similar material. The present invention also reduces the formation of static electric charges by coating the cassette with an antistatic material. In a further embodiment of the present invention, the fluid flow line may include an electrical conductor connected to a ground.
Inventors
- 👤 James E. Coutre
- 👤 Scott F. Jenney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:22
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/142; A61M5/14212; A61M5/14224; C; C09; C09K; C09K3/00; C09K3/16; A61M2205/00; A61M2205/02; A61M2205/0233; A61M2205/42
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
64 words
An infusion system for administering infusates to a patient comprising: a pumping system including means for pumping the infusates from at least one fluid flow line to at least one fluid outlet flow line connected to the patient; and means associated with an interface between the pumping means and the infusate for preventing static electricity from causing artifact in an electrocardiogram of the patient.
Claim 2
Dependent Claim
64 words
An infusion system for administering infusates to a patient comprising: a pumping system including means for pumping the infusates from at least one fluid flow line to at least one fluid outlet flow line connected to the patient; and means associated with an interface between the pumping means and the infusate for preventing static electricity from causing artifact in an electrocardiogram of the patient.
Claim 3
Dependent Claim
24 words
The infusion system of claim 1 wherein the artifact preventing means comprises means for preventing the generation of static electricity at the pumping means.
Claim 4
Dependent Claim
87 words
The infusion system of claim 2 wherein the pumping means further includes a pumping chamber, a flexible diaphragm forming a wall of the pumping chamber, and a pumping piston mounted for reciprocal movement into and out of the pumping chamber, the pumping piston having a face disposed to push against the diaphragm; and the static electricity preventing means comprises forming both the face of the piston and the diaphragm from a material tending to reduce the exchange of electrical charge between the piston face and the diaphragm.
Claim 5
Dependent Claim
95 words
The infusion system of claim 3 wherein the pumping means further includes an inlet valve comprising a valve aperture, a valve diaphragm, and a valve piston mounted for reciprocal movement into and out of the valve aperture and having a face disposed to push against the valve diaphragm to close the valve aperture; and the static electricity preventing means further comprises forming the inlet valve piston face and the inlet valve diaphragm from a further material tending to reduce the exchange of electrical charge between the inlet valve piston face and the inlet valve diaphragm.
Claim 6
Dependent Claim
87 words
The infusion system of claim 2 wherein: the pumping means further comprises: a housing having cassette receiving means, a cassette releasably mounted to the cassette receiving means of the housing, the cassette including means for receiving the at least one fluid inlet flow line and means for receiving the at least one fluid outlet flow line; and the artifact preventing means comprises the cassette and the cassette receiving means being comprised of a material tending to reduce the exchange of electrical charge at all points of contact.
Claim 7
Dependent Claim
59 words
The infusion system of claim 2 wherein: the pumping means further comprises: a housing having cassette receiving means, and a cassette releasably mounted to the cassette receiving means of the housing, the cassette including means for receiving the at least one fluid outlet flow line; and the artifact preventing means comprises a coating of antistatic material on the cassette.
Claim 8
Dependent Claim
28 words
The infusion system of claim 6 wherein the antistatic coating is sprayed on the cassette before the cassette is mounted in the cassette receiving means of the housing.
Claim 9
Dependent Claim
32 words
The infusion system of claim 11 wherein the artifact preventing means comprises means for preventing a flow of electric current down the at least one fluid outlet flow line to the patient.
Claim 10
Dependent Claim
26 words
The infusion system of claim 8 wherein the current preventing means comprises means for electrically grounding a static electricity-induced electric current generated at the pumping means.
Claim 11
Dependent Claim
66 words
The infusion system of claim 9 wherein the pumping system further includes an electrical connection to a ground, the pumping means includes a fluid flow line, and the grounding means comprises an electrical conductor disposed along a portion of the fluid flow line to be in electrical contact with infusates flowing along the fluid flow line and further connected to the electrical connection to the ground.
Claim 12
Dependent Claim
15 words
The infusion system of claim 10 wherein the electrical conductor is an electrically conductive wire.
Claim 13
Dependent Claim
87 words
The infusion system of claim 1 wherein the pumping means further includes a pumping chamber, a flexible diaphragm forming a wall of the pumping chamber, and a pumping piston mounted for reciprocal movement into and out of the pumping chamber, the pumping piston having a face disposed to push against the diaphragm, and the artifact preventing means comprises the face of the piston and the diaphragm each being formed from a material tending to reduce the exchange of electrical charge between the piston face and the diaphragm.
Claim 14
Dependent Claim
19 words
The infusion system of claim 12 wherein the material forming the piston face and the diaphragm is silicon rubber.
Claim 15
Dependent Claim
20 words
The infusion system of claim 12 wherein the pumping piston is formed entirely of the material of the piston face.
Claim 16
Dependent Claim
71 words
The infusion system of claim 12 wherein the pumping means further includes an inlet valve comprising a valve aperture, a valve diaphragm, and a valve piston mounted for reciprocal movement into and out of the valve aperture and having a face disposed to push against the valve diaphragm to close the valve aperture, wherein the inlet valve piston face and the inlet valve diaphragm are both formed of a further material.
Claim 17
Dependent Claim
13 words
The infusion system of claim 15 wherein the further material is silicon rubber.
Claim 18
Dependent Claim
25 words
The infusion system of claim 1 wherein the artifact preventing means comprises means for electrically grounding a static electricity-induced current generated at the pumping means.
Claim 19
Dependent Claim
66 words
The infusion system of claim 17 wherein the pumping system further includes an electrical connection to a ground, the pumping means includes a fluid flow line, and the grounding means comprises an electrical conductor disposed along a portion of the fluid flow line to be in electrical contact with infusates flowing along the fluid flow line and further connected to the electrical connection to the ground.
Claim 20
Dependent Claim
15 words
The infusion system of claim 18 wherein the electrical conductor is an electrically conductive wire.
Claim 21
Dependent Claim
24 words
The infusion system of claim 1 wherein the artifact preventing means comprises means for dissipating a static electricity-induced charge generated at the pumping means.
Claim 22
Dependent Claim
36 words
The infusion system of claim 1 wherein the artifact preventing means comprises forming parts of the pumping means capable of relative motion to each other of a material tending to reduce the exchange of electrical charge.
Claim 23
Dependent Claim
116 words
An infusion system for administering infusates to a patient comprising: a pumping system including means for pumping the infusates from at least one fluid inlet flow line to at least one fluid outlet flow line connected to the patient, the pumping means further including a pumping chamber, a flexible diaphragm forming a wall of the pumping chamber, and a pumping piston mounted for reciprocal movement into and out of the pumping chamber, the pumping piston having a face disposed to push against the diaphragm; and means associated with the pumping system for preventing the generation of static electricity at the pumping system comprising forming the face of the piston and the diaphragm from an identical material.
Claim 24
Dependent Claim
116 words
An infusion system for administering infusates to a patient comprising: a pumping system including means for pumping the infusates from at least one fluid inlet flow line to at least one fluid outlet flow line connected to the patient, the pumping means further including a pumping chamber, a flexible diaphragm forming a wall of the pumping chamber, and a pumping piston mounted for reciprocal movement into and out of the pumping chamber, the pumping piston having a face disposed to push against the diaphragm; and means associated with the pumping system for preventing the generation of static electricity at the pumping system comprising forming the face of the piston and the diaphragm from an identical material.
Claim 25
Dependent Claim
77 words
The infusion system of claim 22 wherein the pumping means further includes an inlet valve comprising a valve aperture, a valve diaphragm, and a valve piston mounted for reciprocal movement into and out of the valve aperture and having a face disposed to push against the valve diaphragm to close the valve aperture; and the static electricity preventing means further comprises forming the inlet valve piston face and the inlet valve diaphragm from a further identical material.
Claim 26
Dependent Claim
129 words
An infusion system for administering infusates to a patient comprising: a pumping system including means for pumping the infusates from at least one fluid inlet flow line to at least one fluid outlet flow line connected to the patient, the pumping means further comprising a housing having cassette receiving means, a cassette releasably mounted to the cassette receiving means of the housing, the cassette including means for receiving the at least one fluid inlet flow line and means for receiving the at least one fluid outlet flow line; and means associated with the pumping system for preventing the generation of static electricity at the pumping system, the static electricity preventing means comprising forming the cassette and the cassette receiving means of an identical material at all points of contact.
Claim 27
Dependent Claim
129 words
An infusion system for administering infusates to a patient comprising: a pumping system including means for pumping the infusates from at least one fluid inlet flow line to at least one fluid outlet flow line connected to the patient, the pumping means further comprising a housing having cassette receiving means, a cassette releasably mounted to the cassette receiving means of the housing, the cassette including means for receiving the at least one fluid inlet flow line and means for receiving the at least one fluid outlet flow line; and means associated with the pumping system for preventing the generation of static electricity at the pumping system, the static electricity preventing means comprising forming the cassette and the cassette receiving means of an identical material at all points of contact.
Claim 28
Dependent Claim
121 words
An infusion system for administering infusates to a patient comprising: a pumping system including means for pumping the infusates from at least one fluid inlet flow line to at least one fluid outlet flow line connected to the patient, the pumping means further comprising a housing having cassette receiving means, and a cassette releasably mounted to the cassette receiving means of the housing, the cassette including means for receiving the at least one fluid inlet flow line and means for receiving the at least one fluid outlet flow line; and means associated with the pumping system for preventing the generation of static electricity at the pumping system, the static electricity preventing means comprising a coating of antistatic material on the cassette.
Claim 29
Dependent Claim
121 words
An infusion system for administering infusates to a patient comprising: a pumping system including means for pumping the infusates from at least one fluid inlet flow line to at least one fluid outlet flow line connected to the patient, the pumping means further comprising a housing having cassette receiving means, and a cassette releasably mounted to the cassette receiving means of the housing, the cassette including means for receiving the at least one fluid inlet flow line and means for receiving the at least one fluid outlet flow line; and means associated with the pumping system for preventing the generation of static electricity at the pumping system, the static electricity preventing means comprising a coating of antistatic material on the cassette.
Claim 30
Dependent Claim
28 words
The infusion system of claim 25 wherein the antistatic coating is sprayed on the cassette before the cassette is mounted in the cassette receiving means of the housing.
Claim 31
Dependent Claim
99 words
An infusion pumping system for administering infusates to a patient comprising: a pumping chamber; a diaphragm forming a wall of the pumping chamber; means for connecting a fluid inlet line to the pumping chamber; means for connecting a fluid outlet line to the pumping chamber; and a pumping piston mounted for reciprocal movement into and out of the pumping chamber, the piston having a face disposed to push against the diaphragm, wherein the piston face and the diaphragm are each formed of a material tending to reduce the exchange of electrical charge between the piston face and the diaphragm.
Claim 32
Dependent Claim
99 words
An infusion pumping system for administering infusates to a patient comprising: a pumping chamber; a diaphragm forming a wall of the pumping chamber; means for connecting a fluid inlet line to the pumping chamber; means for connecting a fluid outlet line to the pumping chamber; and a pumping piston mounted for reciprocal movement into and out of the pumping chamber, the piston having a face disposed to push against the diaphragm, wherein the piston face and the diaphragm are each formed of a material tending to reduce the exchange of electrical charge between the piston face and the diaphragm.
Claim 33
Dependent Claim
89 words
The infusion system of claim 27, wherein the fluid inlet line connecting means further comprises an inlet valve comprising a valve aperture, a valve diaphragm, and a valve piston mounted for reciprocal movement into and out of the valve aperture and having a face disposed to push against the valve diaphragm to close the valve aperture, wherein the inlet valve piston face and the inlet valve diaphragm are each formed of a further material tending to reduce the exchange of electrical charge between the piston face and the diaphragm.
Claim 34
Dependent Claim
117 words
An infusion pumping system for administering infusates to a patient comprising: a housing having an electrical connection to a ground and having disposable cassette receiving means; a disposable cassette releasably mounted to the cassette receiving means of the housing; the disposable cassette including means for receiving an inlet infusion flow line, means for receiving an outlet infusion flow line, and a fluid flow path connecting the inlet flow line receiving means to the outlet flow line receiving means; means for pumping along the fluid flow path from the inlet flow line receiving means to the outlet flow line receiving means; and means for electrically grounding the cassette to the electrical connection of the housing to the ground.
Claim 35
Dependent Claim
117 words
An infusion pumping system for administering infusates to a patient comprising: a housing having an electrical connection to a ground and having disposable cassette receiving means; a disposable cassette releasably mounted to the cassette receiving means of the housing; the disposable cassette including means for receiving an inlet infusion flow line, means for receiving an outlet infusion flow line, and a fluid flow path connecting the inlet flow line receiving means to the outlet flow line receiving means; means for pumping along the fluid flow path from the inlet flow line receiving means to the outlet flow line receiving means; and means for electrically grounding the cassette to the electrical connection of the housing to the ground.
Claim 36
Dependent Claim
53 words
The infusion pumping system of claim 29, wherein the cassette grounding means comprises an electrical conductor attached to the cassette along a portion of the fluid flow path to be in electrical contact with infusates flowing along the fluid flow path, the electrical conductor further connected to the electrical connection to the ground.
Claim 37
Dependent Claim
101 words
An infusion pumping system for administering infusates to a patient comprising: a housing having cassette receiving means; a cassette releasably mounted to the cassette receiving means of the housing, the cassette including means for receiving at least one inlet infusion flow line and means for receiving at least one outlet infusion flow line; means for pumping infusates through the cassette from the inlet flow line receiving means to the outlet flow line receiving means; and the cassette and the cassette receiving means each being comprised of a material tending to reduce the exchange of electrical charge at all points of contact.
Claim 38
Dependent Claim
101 words
An infusion pumping system for administering infusates to a patient comprising: a housing having cassette receiving means; a cassette releasably mounted to the cassette receiving means of the housing, the cassette including means for receiving at least one inlet infusion flow line and means for receiving at least one outlet infusion flow line; means for pumping infusates through the cassette from the inlet flow line receiving means to the outlet flow line receiving means; and the cassette and the cassette receiving means each being comprised of a material tending to reduce the exchange of electrical charge at all points of contact.
References Cited (Backward Citations)
US4475141A
Cited
US4696671A
Cited
US4577256A
Cited
US4585320A
Cited
US4627840A
Cited
US4744955A
Cited
US4731068A
Cited
US4866565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-07 | 1996-01-06 | 1996-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-07 | 2000-01-06 | 2000-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-07 | 2004-01-06 | 2004-07-07 | $7700.00 | Window Closed / Lapsed |