EP0329599B1
Expired / Lapsed
EP
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Apparatus for perfusing body cavities
Assignee: Wiest Peter P Dipl-Ing
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Filing: 1989-02-15
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Granted: 1991-12-04
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Expires: 2009-02-15
Abstract
Abstract The invention relates to a procedure for the perfusion of body cavities with a fluid led from a dispenser reservoir 3 via a perfusion line 10 and a medical instrument 6. Pump 4 is connected with the perfusion line 10, a pressure sensor 5 is connected between pump 4 and medical instrument 6 to perfusion line 10, and an adjustment and measurement electronic system 12 is connected to pressure sensor 5 and pump 4. To build up, maintain, and measure as precisely as possible a preselected and precisely determined pressure in the body cavity, according to the invention the adjustment and measurement electronic system 12 determines the actual pressure in body cavity 1 by evaluating the pressure PIST measured by pressure sensor 5, the volume flow V supplied by pump 4, and the conductance G of the perfusion line 9 between pressure sensor 5 and instrument 6 and conductance G of instrument 6, and the pressure PSOLL in body cavity 1 is maintained constant at preset level PSOLL by continuous adjustment of the output of pump 4 with due consideration for conductance G.
Inventors
- 👤 Peter P. Dipl.-Ing. Wiest
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 15:10
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/168; A61M5/16831; A61M5/16854; A61M3/00; A61M3/02; A61M3/0202; A61M3/0204; A61M3/0208; A61M3/0216; A61M3/022; A61M3/0233; A61M3/0254; A61M3/0258; G; G05; G05D; G05D16/00; G05D16/20; G05D16/2006; G05D16/2066; A61M2205/00; A61M2205/33; A61M2205/3317; A61M2205/3331; A61M2205/3334; A61M2205/3344; A61M2205/3365; A61M2205/3379; A61M2205/3393; A61M2205/50; A61M2205/52; Y; Y10; Y10S; Y10S128/00; Y10S128/13
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
284 words
A device for the perfusion of body cavities, comprising a liquid supplied from a supply container over a perfusion line and a medical instrument, a pump connected to the perfusion line, a pressure transducer connected between the pump and the medical instrument, a device for measuring the volume flow and an electronic regulating and measuring circuitry connected to the pressure transducer and the pump, said circuitry determining the actual pressure in the body cavity by evaluation of the pressure measured by the pressure transducer, characterized by that the electronic regulating and measuring circuitry (12) is provided for determining the actual pressure (P ACT ) in the body cavity (1) by evaluation of the pressure (P MEAS ) measured by the pressure transducer (5), of the volume flow (V) supplied over the pump (4) and of the conductivity (G₁) of the perfusion line (9) between the pressure transducer (5) and the instrument (6), and of the conductivity (G₂) of the instrument (6), that a device is provided for determining the conductivities (G₁) of the perfusion line (9) between the pressure transducer (5) and the medical instrument (6), and the conductivities (G₂) of the instrument (6) by releasing a short-time sample supply of liquid by means of the pump (4) through the medical instrument (6) against the atmosphere for different volume flows (V), that a device is provided for storing the determined conductivities (G₁, G₂) in the electronic regulating and measuring circuitry (12), and that a device is provided for holding the pressure (P ACT ) in the body cavity constant by continuous regulation of the supply capacity of the pump (4) under consideration of the conductivities (G₁, G₂) at a preset value (P DES ).
Claim 2
Independent Claim
284 words
A device for the perfusion of body cavities, comprising a liquid supplied from a supply container over a perfusion line and a medical instrument, a pump connected to the perfusion line, a pressure transducer connected between the pump and the medical instrument, a device for measuring the volume flow and an electronic regulating and measuring circuitry connected to the pressure transducer and the pump, said circuitry determining the actual pressure in the body cavity by evaluation of the pressure measured by the pressure transducer, characterized by that the electronic regulating and measuring circuitry (12) is provided for determining the actual pressure (P ACT ) in the body cavity (1) by evaluation of the pressure (P MEAS ) measured by the pressure transducer (5), of the volume flow (V) supplied over the pump (4) and of the conductivity (G₁) of the perfusion line (9) between the pressure transducer (5) and the instrument (6), and of the conductivity (G₂) of the instrument (6), that a device is provided for determining the conductivities (G₁) of the perfusion line (9) between the pressure transducer (5) and the medical instrument (6), and the conductivities (G₂) of the instrument (6) by releasing a short-time sample supply of liquid by means of the pump (4) through the medical instrument (6) against the atmosphere for different volume flows (V), that a device is provided for storing the determined conductivities (G₁, G₂) in the electronic regulating and measuring circuitry (12), and that a device is provided for holding the pressure (P ACT ) in the body cavity constant by continuous regulation of the supply capacity of the pump (4) under consideration of the conductivities (G₁, G₂) at a preset value (P DES ).
Claim 3
Dependent Claim
28 words
2 A device according to claim 1, characterized by that the conductivities of different instruments (6) can be stored beforehand in the electronic regulating and measuring circuitry (12).
Claim 4
Independent Claim
39 words
A device according to claims 1 or 2, characterized by that a weight sensor (15) is attached at the supply container (12) and is connected with the electronic regulating and measuring circuitry (12) for determining the volume flow (V).
Claim 5
Dependent Claim
36 words
A device according to claim 1, characterized by that a speed sensor (16) is provided at the pump (4) and is connected with the electronic regulating and measuring circuitry (12) for determining the volume flow (V).
Claim 6
Independent Claim
45 words
A device according to claims 1, 3 or 4, characterized by that a volume flow sensor is provided at the perfusion hose (10) and is connected with the electronic regulating and measuring circuitry (12) for determining the volume flow (V) in the order of zero.
Claim 7
Independent Claim
63 words
A device according to one of claims 3 to 5, characterized by that a device for short-time stopping of the pump (4) by means of the electronic regulating and measuring circuitry (12) is provided, in this condition the static pressure (P ACT ) corresponding to the actual body cavity pressure being determined and being used for self-monitoring of the calculated body cavity pressure.
Claim 8
Independent Claim
43 words
A device according to one of claims 3 to 6, characterized by that the electronic regulating and measuring circuitry (12) is provided with LED displays (21) for indicating the body cavity pressure (P ACT ) and the pressure of apparatus (P APP ).
Claim 9
Independent Claim
26 words
A device according to one of the preceding claims, characterized by that the pump (4) is replaced by a supply container (3) with controllable pressure sleeve.
Claim 10
Independent Claim
41 words
A device according to one of the preceding claims, characterized by that the pump (4) is replaced, under making use of gravity, by a supply container (3) for the liquid with a volume flow valve arranged at the output side thereof.
References Cited (Backward Citations)
No citation records indexed.
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