DE2640413A1 - Katheter-ueberwachungsgeraet - Google Patents
Katheter-ueberwachungsgeraetInfo
- Publication number
- DE2640413A1 DE2640413A1 DE19762640413 DE2640413A DE2640413A1 DE 2640413 A1 DE2640413 A1 DE 2640413A1 DE 19762640413 DE19762640413 DE 19762640413 DE 2640413 A DE2640413 A DE 2640413A DE 2640413 A1 DE2640413 A1 DE 2640413A1
- Authority
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- Germany
- Prior art keywords
- measuring
- signal
- vessel
- alarm
- measuring vessel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/20—Measuring for diagnostic purposes; Identification of persons for measuring urological functions restricted to the evaluation of the urinary system
- A61B5/201—Assessing renal or kidney functions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/20—Measuring for diagnostic purposes; Identification of persons for measuring urological functions restricted to the evaluation of the urinary system
- A61B5/207—Sensing devices adapted to collect urine
- A61B5/208—Sensing devices adapted to collect urine adapted to determine urine quantity, e.g. flow, volume
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Veterinary Medicine (AREA)
- Biomedical Technology (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Biophysics (AREA)
- Heart & Thoracic Surgery (AREA)
- Urology & Nephrology (AREA)
- Pathology (AREA)
- Surgery (AREA)
- Molecular Biology (AREA)
- Medical Informatics (AREA)
- Physiology (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Anesthesiology (AREA)
- Electromagnetism (AREA)
- Hematology (AREA)
- Pulmonology (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- External Artificial Organs (AREA)
Description
Dr. Hugo Wilcken _
Dipl.-! ng. Thomas Wilcken . A ύβΡ· 1976
Dipl.-Chem. Dr. Wolfgang Läufer (f. 2640413
24 LflbBcii, Breite Straße 52-54
Anmelder: Richard Wolf GmbH, Pforzheimer Str. 22, 7134 Knittlingen
Katheter-Überwachungsgerät
Die Erfindung betrifft ein Gerät zur überwachung der aus einem
Katheter austretenden Körperflüssigkeit, bei dem unter Verwendung eines Meßgefäßes die Körperflüssigkeit aufgefangen und das Füllvolumen
gemessen wird, um hieraus ein dem Füllvolumen entsprechendes elektrisches Meßsignal zu entwickeln.
Nach Operationen bzw. endoskopischen Eingriffen in der Niere und der Blase werden postoperativ Katheter eingelegt, um den urin direkt
abzuleiten. Hierbei ist es wichtig, daß eine bestimmte Urinmenge pro Zeiteinheit abgeht und daß beim Verstopfen oder Abklemmen des
Katheters das Pflegepersonal alarmiert wird, um die Ursache der Störung zu beseitigen.
Es sind Überwachungsgeräte bekannt, bei denen die Körperflüssigkeit
aus dem Katheter in ein Gefäß mit einem engen Auslaß geleitet wird, aus dem die Flüssigkeit tropfenweise austritt, wobei die Tropfen
zwei oder mehr mit geringem Abstand zueinander liegende Elektroden kurzzeitig überbrücken. Dieser Vorgang wird elektrisch zur Steuerung
einer Signalschaltung herangezogen, indem etwa ein zeitlich über-
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mäßig langes Ausbleiben von Tropfen bzw. Elektrodenüberbrückungen einen Alarm zur Folge hat·.
Diese Geräte haben sich allerdings in der Praxis nicht bewährt, da
sie im Aufbau zu aufwendig und störanfällig sind. Außerdem bereitet die Reinigung der Geräte meist Schwierigkeiten.
Die Aufgabe der Erfindung besteht in der Beseitigung dieser Nachteile
und insbesondere in der Schaffung eines Überwachungsgerätes, bei dem über ein elektrisches Warnsystem eine beliebige Einstellung
der Alarmschwelle möglich ist.
Zu diesem Zweck wird das eingangs erwähnte Gerät nach der Erfindung
so ausgebildet, daß in einem vorgegebenen Meßtakt das Meßsignal als Ist-Wert mit einem Soll-Wert vergleichbar ist, der den bei einer normalen
Körperfunktion in der Taktzeit zu erwartenden Füllvolumen zugeordnet ist, daß bei einem negativen Vergleich, also wenn der Ist-Wert
nicht mit dem Soll-Wert übereinstimmt, mittels einer Alarmeinrichtung .ein AlarmsignalT..erzeugt JwjLxd _und -daß xlas __Meß gefäß. jnach_jsdem
Meßtakt automatisch entleert wird.
Zweckmäßigerweise kann die Alarmeinrichtung so vorprogrammiert werden,
daß das Alarmsignal erst nach Ablauf einer einstellbaren Anzahl von Meßtakten gegeben wird, falls das Meßsignal den Soll-Wert während
dieser Meßtakte nicht erreicht hat. Auf diese Weise wird eine unnötige Alarmgabe vermieden, falls sich im Laufe der eingestellten
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Q 2640A13
Meßtakte die Körperfunktion des Patienten wieder normalisiert hat
oder wenn es sich nur um eine unschädliche vorübergehende Störung des Gerätes gehandelt hat.
Aus der Feststellung jedes negativen Vergleichs wird ein elektrischer
Zählimpuls erzeugt/ der auf einen Zähler gegeben wird, dessen Endstellung über eine Gatterlogik programmierbar ist. Dieser Zähler
zählt die unmittelbar nacheinander einlaufenden Zählimpulse und löst nach Erreichen seiner vorgewählten Endstellung Alarm aus. Anderenfalls
wird der Zähler gelöscht bzw. zurückgestellt, sobald er vor Erreichen seiner Endstellung ein Rückstellsignal empfängt, das bei
einem positiven Vergleich des Ist-Wertes mit dem Soll-Wert entwickelt wird.
Das Füllvolumen im Meßgefäß wird kapazitiv gemessen, indem die Kapazität
eines Kondensators vom zeitabhängigen Füllstand der Körperflüssigkeit beeinflußt und die Kapazitätsänderung zur Erzeugung des
Meßsignals elektrisch ausgewertet wird.
In der anliegenden Zeichnung ist ein Ausführungsbeispiel der Erfindung
dargestellt. Es zeigen:
Figur 1 die Seitenansicht des mechanischen Geräteaufbaues in teilweisem Längsschnitt und
Figur 2 schematisch die elektrische Schaltung des Überwachungsgerätes .
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26A0A13
Die Körperflüssigkeit gelangt gemäß Figur. 1 vom Katheter des Patienten
über den Schlauch 1 zu einem Einlauftrichter 2 und von diesem aus in das Meßgefäß 3. In diesem sind zwei getrennte Elektroden 4,
vorgesehen, die einen Meßkondensator bilden und von denen eine mit einem Dielektrikum 5 a beschichtet ist, so daß die Körperflüssigkeit
nur leitenden Kontakt mit der anderen Elektrode haben kann.
Durch die in das Gefäß 3 einfließende Flüssigkeit ändert sich wegen
des direkten Kontaktes der Körperflüssigkeit mit einer Elektrode die Geometrie des Meßkondensators 4, 5 und somit die Kapazität,
und zwar in direkter Abhängigkeit vom jeweiligen Füllstand und Füllvolumen im Meßgefäß. Auf an sich bekannte Weise wird in einem Meßspannungsgeber
6 aus .der Kapazitätsänderung eine Spannungsänderung
erzeugt, die als Meßspannung zur Verfügung steht und der zeitlichen Volumenfunktion entspricht.
Das Meßgefäß 3 ist am unteren Auslauf mit einem Stößel 7 verschlossen,
der als Dauermagnet 8 mit einem Mantel 9 aus Kunststoff ausgebildet'
1st." Im übrigen" ist der "im Raum 10 axial geführte und mit
einer Feder 11 abgestützte Stößel 7 außen von einer Wicklung 12 umgeben, die als Magnetwicklung zusammen mit dem Stößel ein Magnetventil
bildet.
Wie noch später näher zu erläutern ist, wird der Stößel 7 bei Erregung
des Magnetventils gegen die Wirkung der Feder 11 nach unten gezogen,
um den Auslauf des Gefäßes 3 freizugeben und die Körperflüs-
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sigkeit in den Schlauch 13 abfließen zu lassen. Zweckmäßigerweise
sollte zumindest das Innenrohr 14, der Stößel 7 mit der Feder 11 sowie das Gefäß 3 mit den Elektroden 4, 5 zu Reinigungszwecken leicht
ausgebaut werden können.
Der schaltungstechnische Aufbau des Gerätes geht aus der Figur 2 hervor. Der Meßspannungsgeber 6 gibt eine dem augenblicklichen Füllvolumen
im Gefäß 3 entsprechende Spannung als Meßsignal auf die Leitung 15. Ein schreibendes und anzeigendes Registriergerät 16 kann
das Meßsignal direkt über die Leitung 17 aufnehmen, um so die unmittelbar abgehende Körperflüssigkeit als Volumen registrieren zu können.
Hierdurch kann man sich beispielsweise ein Bild darüber verschaffen, wie gleichmäßig die Nieren Urin ausscheiden.
Weiterhin kann das Meßsignal· über einen Integrierkreis 18 zum Gerät
16 geleitet werden, um die gesamte Menge der in das Gefäß 3 geflossenen
Flüssigkeit registrieren zu lassen. Schließlich ist auch noch ein Differenzierkreis 19 vorgesehen, in dem das Meßsignal differenzier-fc
,wird, und ,dessen,.Ausgangssignal, dann^die -zeitliche-^ Strömu-ngsratedarstellt,
die ebenfalls im Gerät 16 zur Registrierung kommt.
Eine Aussage darüber, ob ein Patient ausreichend Körperflüssigkeit
ausscheidet, läßt sich dadurch erzielen, daß man das in einer bestimmten Zeit im Gefäß 3 angesammelte Füllvolumen als Ist-Wert in
Vergleich setzt zu einem Soll-Wert, der bei einer normalen oder einer
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auf den jeweiligen Behandlungsfall abgestellten Körperfunktion an
sich erwartet werden muß.
Für das Füllvolumen steht eine Vergleichsgröße durch das vom Meßgeber
6 kommende Meßsignal als Spannung auf der Leitung 15 zur Verfügung.
Diese Spannung gelangt auf einen Eingang eines Differenzverstärkers 20. Der Soll-Wert wird am Stellwiderstand 21 vorprogrammiert
und auf den anderen Eingang des Verstärkers 20 gegeben.
Die einzuhaltende Meßzeit wird von einem Taktgeber 22 bestimmt, dem
ein Impulsgeber 22 a zugeordnet ist. Dieser erzeugt innerhalb der gesamten Taktzeit T einen Impuls a, der zur Einleitung des Vergleichs
zwischen dem tatsächlichen Füllstand im Gefäß 3 als Ist-Wert und dem am Widerstand 21 eingestellten Soll-Wert auf die Leitung 23 gegeben
wird.
Wenn der Ist-Wert den Soll-Wert erreicht hat und damit der Vergleich
positiv ausfällt, ist am Ausgang des Differenzverstärkers 20 ein
Ausgangssigna-l -vorhanden-/· das an· einem -Eingang--des -Tores--24~ ansteht/·-
während der andere Eingang dieses Tores mit dem Impuls a beaufschlagt wird. Bei diesem Betriebszustand wird am Ausgang des Tores 24 ein
Rückstellimpuls entstehen, der über die Leitung 26 einen Zähler 27
auf "0" stellt mit der Folge, daß die nachgeschaltete Älarmeinrichtung
28 kein Signal gibt*
Wenn andererseits am Tor 24 kein Ausgangsimpuls entsteht, also wenn
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der Vergleich zwischen Ist-Wert und Soll-Wert negativ ausgefallen ist,
erzeugen während der Meßzeit der Inverter 29 und das Tor 30, an dessen einem Eingang ebenfalls der Impuls a liegt, einen Zählimpuls,
der über die Leitung 31 auf den Eingang des Zählers 27 gelangt und diesen um eine Zählstellung weiterstellt. Wie noch nachfolgend beschrieben
wird, würde bei dieser Zählerstellung eine Alarmgabe ausgelöst, wenn die Endstellung des Zählers 27 auf "1" programmiert ist.
Die jeweiligen Endstellungen des Zählers werden mit einer Gatterlogik
32 programmiert. Bexspxelsweise könnte die Endstellung auf "4" eingestellt werden, wie es auch in der Zeichnung dargestellt ist. Hieraus
wird folgen, daß insgesamt vier Zählimpulse nacheinander über die Leitung 31 in den Zähler 27 einlaufen müßten, bevor dieser in die
vorprogrammierte Endstellung i54n gelangt und über die Leitung 33 ein
Alarmsignal zur Älarmeinrichtung 28 gibt, die hierdurch in Betrieb
gesetzt v/ird. Auf diese Weise hätte man im Vergleich zu einer Zählerendstellung
"1" eine Zeitvorgabe von vier Meßtakten bis zu einer Alarmauslösung für den PaIl1, daß nacheinander vier negative Vergleiche
ermittelt werden und dar"'-'" auch vier Zäh !impulse auf der Leitung
31 ankommen. Dies bringt insofern vorteilet, als eine kurzzeitige unschädliche
Störung oder ein nur vorübergehend ungenügender Fluß von
Körperflüssigkeit keine unnötige Alarmgabe verursachen wird, da bei
einem wieder positiven Vergleich während der Zeit von vier Takten und
vor Erreichen der Zählerendstelluncr über die Lei tuna 26 das Zähler-
S81C/Ö4S9
rückstellsignal kommen wird.
Zum Taktgeber 22 gehört ein weiterer Impulsgeber 22 b, der nach Durchführung des vorher beschriebenen Meßvorganges einen Impuls b
über die Leitung 34 zur Wicklung 12 des Magnetventils gibt, um durch Einwirkung des sich aufbauenden Magnetfeldes den Stößel 7 von
der AuslaufÖffnung des Gefäßes 3 abzuheben und dieses leerlaufen zu
lassen. Nach Beendigung dieses Steuerimpulses wird der Magnet entregt, und die Feder 11 drückt den Stößel 7 auf seinen Sitz zurück.
Um kontrollieren zu können, ob das Gefäß 3 vor dem nächsten Meßtakt
und Meßvorgang vollständig entleert ist, wird in der zum Taktgeber 22 gehörenden Schaltung 22 c ein Impuls c entwickelt, der
auf die Leitung 35 und zunächst an den einen Eingang eines Tores 36 gelangt. Am anderen Eingang dieses Tores ist der Ausgang eines Verstärkers
37 angeschlossen, der über die Leitungen 15 und 38 mit dem Meßsignal gespeist wird.
Wenn das Gefäß 3"während der Dauer des Impulses" c leer" ist," entstellt
am Ausgang des Tores 36 ein Impuls. Dieser wird über den Inverter 39 und das Tor 40 gedreht, an dem ebenfalls der Impuls c über die Leitung
41 ansteht. Dies hat zur Folge, daß kein Alarmsignal auf der Leitung 42 zur Alarmeinrichtung 28 kommen wird. Wenn dagegen das Meßgefäß
3 nicht völlig leer ist, entsteht am Ausgang des Tores 40 ein Alarmimpuls, der die Alarmeinrichtung 28 in Betrieb setzt, um einen
technischen Fehler des Gerätes anzuzeigen.
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Α-it
Das Signal, das einen solchen Fehler anzeigt, soll sich von dem Signal,
das ein ungenügendes Füllvolumen anzeigt, eindeutig unterscheiden,
damit das Pflegepersonal sofort erkennen kann, wo eine Störung gegeben ist und wo eine Prüfung stattzufinden hat. Das eine Signal
kann also beispielsweise akustisch mit dem Lautsprecher 43 und das andere Signal optisch mit der Lampe 44 erzeugt werden. Andererseits
könnte man auch nur mit Lampen oder Lautsprechern bzw. akustischen Signalgebern arbeiten, wenn man die Unterscheidung durch unterschiedliche
Lichtfarben oder sich stark voneinander abhebende Tonhöhen bzw. Tonpegel gewährleistet.
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, * Al-Leerseite
Claims (9)
1./ Gerät zur Überwachung der aus einem Katheter austretenden Körperflüssigkeit,
bei dem unter Verwendung eines Meßgefäßes die Körperflüssigkeit aufgefangen und das Füllvolumen gemessen wird,
um hieraus ein dem Füllvolumen entsprechendes elektrisches Meßsignal zu entwickeln, dadurch gekennzeichnet, daß in einem vorgegebenen
Meßtakt (T) das Meßsignal als Ist-Wert mit einem Soll-Wert verglichen wird, der einem bei einer normalen Körperfunktion
in der Taktzeit zu erwartenden Füllvolumen zugeordnet ist, daß bei einem negativen Vergleich über eine Alarmeinrichtung (28)
ein Alarmsignal erzeugt wird und daß das Meßgefäß (3) vor dem jeweils nächsten Meßtakt entleert wird.
2. Gerät nach Anspruch 1, dadurch gekennzeichnet, daß die Alarmeinrichtung
(28) so programmierbar ist, daß das Alarmsignal nach Ablauf einer einstellbaren Anzahl von Meßtakten (T) gegeben
wird, falls während dieser Meßtakte kein positiver Vergleich
zwischen Ist-Wert und Soll-Wert anfällt.
3. Gerät nach Anspruch 2, dadurch gekennzeichnet, daß aus der Fest-
- 2 ORIGINAL INSPECTED
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stellung jedes negativen Vergleichs ein elektrischer Zählimpuls
entwickelt wird, der auf einen Zähler (27) gegeben wird, dessen Endstellung über eine Gatterlogik (32) vorprogrammiert ist, daß
der Zähler die unmittelbar nacheinander einlaufenden Zählimpulse zählt und nach Erreichen seiner Endstellung Alarm auslöst
und daß der Zähler gelöscht bzw. zurückgestellt wird, sobald er vor Erreichen seiner Endstellung ein aus einem positiven Vergleich
entwickeltes Rückstellsignal empfängt.
4. Gerät nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß die Steuerung des Funktionsablaufes mittels eines Taktgebers
(22) erfolgt, der kurz vor Ende jeder Taktzeit (T) einen Impuls (a)
zur Durchführung des Vergleichs zwischen dem Ist-Wert und dem Soll-Wert abgibt, nachfolgend einen Impuls (b) zum Entleeren
des Meßgefäßes (3) und anschließend einen weiteren Impuls (c) für eine Prüfschaltung (36, 37, 39, 40) liefert, welche die
Vollständigkeit der Entleerung des Meßgefäßes überprüft und bei nicht entleertemMeßgefäß ein Alarmsignal auslöst, welches sich
vom anderen möglichen Alarmsignal unterscheidet."
5. Gerät nach einem oder mehreren der Ansprüche 1 bis 4, gekennzeichnet
durch ein schreibendes und/oder anzeigendes Registriergerät (16), dem das dem Füllvolumen entsprechende Meßsignal
wahlweise oder in Kombination direkt, nach Differentiation über einen Differenzierkreis (19) und nach Integration über einen
Integrierkreis (18) zwecks Aufzeichnung zugeführt wird.
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6. Gerät nach einem oder mehreren der Ansprüche 1 bis 5, dadurch
gekennzeichnet, daß das Füllvolumen im Meßgefäß (3) kapazitiv gemessen wird, indem die Kapazität eines Meßkondensators (4, 5)
vom zeitabhängigen Füllstand im Meßgefäß beeinflußt und die Kapazitätsänderung zur Erzeugung des Meßsignals ausgewertet
wird.
7. Gerät nach Anspruch 6, dadurch gekennzeichnet, daß die eine Kondensatorelektrode (4 oder 5) mit einem Dielektrikum beschichtet
ist.
8. Gerät nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Auslauf des Meßgefäßes (3) durch den
federbelasteten Stößel (7) eines Magnetventils verschlossen ist, das beim Auftreten des vom Taktgeber (22, 22 b) kommenden Signals
zur Entleerung des Meßgefäßes erregt wird, um den Ventilstößel zur Freigabe des Gefäßauslaufes zu betätigen.
9. Gerät nach einem .oder-mehreren der .Ansprüche .1 .i>is ^.,.dadurch...
gekennzeichnet, daß es zu Reinigungszwecken zumindest teilweise
demontierbar ist.
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19762640413 DE2640413C3 (de) | 1976-09-08 | 1976-09-08 | Katheter-Überwachungsgerät |
FR7727150A FR2364036A1 (fr) | 1976-09-08 | 1977-09-07 | Appareil de controle de catheter |
GB3761177A GB1574066A (en) | 1976-09-08 | 1977-09-08 | Device for monitoring body liquid coming from a catheter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19762640413 DE2640413C3 (de) | 1976-09-08 | 1976-09-08 | Katheter-Überwachungsgerät |
Publications (3)
Publication Number | Publication Date |
---|---|
DE2640413A1 true DE2640413A1 (de) | 1978-03-09 |
DE2640413B2 DE2640413B2 (de) | 1979-07-26 |
DE2640413C3 DE2640413C3 (de) | 1980-03-27 |
Family
ID=5987444
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19762640413 Expired DE2640413C3 (de) | 1976-09-08 | 1976-09-08 | Katheter-Überwachungsgerät |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2640413C3 (de) |
FR (1) | FR2364036A1 (de) |
GB (1) | GB1574066A (de) |
Cited By (449)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0007618A2 (de) * | 1978-07-24 | 1980-02-06 | Terumo Corporation | Tropfenmessgerät |
DE4137075A1 (de) * | 1991-11-12 | 1993-05-13 | Sigfried Dipl Ing Hessberg | Messzelle fuer ein geraet zur ueberwachung von aus einem katheter austretender koerperfluessigkeit |
WO1996005873A1 (en) * | 1994-08-22 | 1996-02-29 | Kinetic Concepts Inc. | Wound drainage equipment |
US6994702B1 (en) | 1999-04-06 | 2006-02-07 | Kci Licensing, Inc. | Vacuum assisted closure pad with adaptation for phototherapy |
US7004915B2 (en) | 2001-08-24 | 2006-02-28 | Kci Licensing, Inc. | Negative pressure assisted tissue treatment system |
US7117869B2 (en) | 1997-09-12 | 2006-10-10 | Kci Licensing, Inc. | Surgical drape and suction head for wound treatment |
US7144390B1 (en) | 1999-04-02 | 2006-12-05 | Kinetic Concepts, Inc. | Negative pressure treatment system with heating and cooling provision |
US7214202B1 (en) | 1997-07-28 | 2007-05-08 | Kci Licensing, Inc. | Therapeutic apparatus for treating ulcers |
US7273054B2 (en) | 1997-09-12 | 2007-09-25 | Kci Licensing, Inc. | Surgical drape and head for wound treatment |
US7279612B1 (en) | 1999-04-22 | 2007-10-09 | Kci Licensing, Inc. | Wound treatment apparatus employing reduced pressure |
US7645269B2 (en) | 2001-04-30 | 2010-01-12 | Kci Licensing, Inc. | Gradient wound treatment system and method |
US7651484B2 (en) | 2006-02-06 | 2010-01-26 | Kci Licensing, Inc. | Systems and methods for improved connection to wound dressings in conjunction with reduced pressure wound treatment systems |
US7670323B2 (en) | 1995-11-14 | 2010-03-02 | Kci Licensing, Inc. | Portable wound treatment apparatus having pressure feedback capabilities |
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Also Published As
Publication number | Publication date |
---|---|
FR2364036A1 (fr) | 1978-04-07 |
GB1574066A (en) | 1980-09-03 |
FR2364036B1 (de) | 1983-06-03 |
DE2640413C3 (de) | 1980-03-27 |
DE2640413B2 (de) | 1979-07-26 |
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