Arrangement for anaesthetising a living creature

• US 7,040,315 B1
• Filed: 05/08/2000
• Issued: 05/09/2006
• Est. Priority Date: 05/10/1999
• Status: Expired due to Fees

• Current Assignee: Aneo AB
• Original Assignee: Aneo AB
• Inventors: Strömberg, Stefan
• Primary Examiner(s): Dawson, Glenn K.
• Assistant Examiner(s): Mendoza, Michael G
• Application Number:
  US09/959,841
• Time in Patent Office: 2,192 Days
• Field of Search: 128/203.12, 128/203.13, 128/203.14, 128/203.26, 128/203.27, 128/203.28, 128/204.18, 128/204.22
• US Class Current: 128/203.14
• CPC Class Codes: A61M 16/0051 with alarm devices
• CPC Class Codes: A61M 16/01 specially adapted for anaesthetising A61M16/104, A61M16/18 take precedence
• CPC Class Codes: A61M 16/024 including calculation means, e.g. using a processor
• CPC Class Codes: A61M 16/0841 for sampling
• CPC Class Codes: A61M 16/085 Gas sampling
• CPC Class Codes: A61M 16/0858 Pressure sampling ports
• CPC Class Codes: A61M 2016/0036 in the breathing tube and used in both inspiratory and expiratory phase
• CPC Class Codes: A61M 2205/505 Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
• CPC Class Codes: A61M 2230/04 Heartbeat characteristics, e.g. ECG, blood pressure modulation
• CPC Class Codes: A61M 2230/205 partial oxygen pressure (P-O2)
• CPC Class Codes: A61M 2230/432 partial CO2 pressure (P-CO2)
• CPC Class Codes: A61M 2230/435 partial O2 pressure (P-O2)

Abstract

The invention relates to an arrangement (200) for anaesthetising a living creature (V) and for maintaining said creature in an anaesthetised state, by administering thereto an infused volume of anaesthesia inducing pharmaceutical (22) in liquid phase per unit of time, with the aid of one or more lung ventilator units (A) and one or more infusion units (B). Chosen parts of the lung ventilator unit, with the exception of external insufflation hose, expiration valve, measuring probe and a number of hoses (12), and selected parts of the infusion unit (B), with the exception of cannula (5B) and hose (4B) are mutually combined to form a single equipment unit (201). Some of the parts of the equipment unit are mutually coordinated with respect to communication via a computer unit (600) included in the equipment unit, and the computer unit is adapted to monitor unit related criteria and creature related criteria.

Claims

1. An arrangement for anaesthetising a living creature and maintaining said creature anaesthetised, by administering to said creature an infused volume of an anaesthesia inducing pharmaceutical in liquid phase per unit of time, said arrangement comprising:

a. at least one lung ventilator unit, an insufflation hose extending from said at least one lung ventilator unit to an expiration valve for being oriented adjacent to or mouth-proximal said creature, a measuring probe spaced from said at least one lung ventilator unit, and a plurality of further hoses extending from said at least one lung ventilator unit,

b. at least one infusion unit having parts related to said infusion unit co-ordinated to said arrangement, a cannula, and a hose extending from said infusion unit and operatively connected to said cannula,

c. first means related to a computer unit for monitoring unit-related criteria,

d. second means related to said computer unit for monitoring creature-related criteria,

e. a display unit exposing a display surface for said unit-related criteria and said creature-related criteria,

f. said valve having a first part and a second part that each perform different functions, said first part being included in the at least one ventilator unit for applying an over pressure to one of said hoses, and said second part being moveable from a first valve member position to a second valve member position, so as to force insufflation gas into the creature when said second part is in said first valve member position and to enable expiration gas to pass freely from said creature when said second part in said second valve member position,

g. said plurality of hoses extending from said at least one ventilator unit are adapted as pressure-measuring hoses for measuring pressure differences and pressure variations generated by a gas flow in said measuring probe adjacent said valve by using said insufflation gas flow,

h. said plurality of hoses extending from said at least one ventilator unit further including a gas analysis hose operatively associated with said measuring probe and adapted to enable flow of at least one of insufflation gas and expiration gas to an evaluating unit for gas analysis,

i. said gas analysis hose and said plurality of hoses extending from said at least one ventilator unit are connected to equipment for sensing and evaluating selected criteria, said selected criteria including a time wise variation of the at least one of air path pressure and a flow rate, a VL-value denoting the volume of insufflated gas and a volume valve of expired gas, and/or a FiO2 value denoting a fraction of inspired oxygen content in the insufflation gas and in the expiration gas,

j. wherein a plurality of values obtained from said evaluating unit are sent to said computer unit, said plurality of values including;

k. a HR value denoting a heart frequency,

l. a NIBP-value denoting a systolic blood pressure, a mean value and a diastolic blood pressure, and/or

m. a SpO₂ value denoting, in percentage, a blood oxygen saturation value;

n. the plurality of values representing item “

k”

to “

m”

are each received by their respective control unit, and wherein each of said control units is connected to said computer unit,

o. an information carrying line connecting said computer unit to said display unit,

p. said information carrying line being adapted for a two-way information exchange so that the computer unit is able to transmit desired values to the display unit,

q. whereby a selected surface area of said display unit can be used to send instructions and messages to said computer unit, and

r. said computer unit being equipped with an expert system wherein a utilised computer program is adapted to sense and calculate and interpret obtained measurements values and set alarm limits.

2. An arrangement according to claim 1, further comprising an equipment unit including at least said at least one ventilator unit, at least one therapeutic unit and at least one diagnostic unit, wherein at least one of said at least one therapeutic unit and said at least one diagnostic unit is structured on at least one printed circuit board, which has a function unit mounted thereon;

wherein said at least one board is co-ordinated in an equipment unit, with one input of respective units connected to one part of a two-part coupling device, and wherein said part of said coupling device is attached to and co-ordinated on said equipment unit.

3. An arrangement according to claim 2, wherein said equipment unit has connected thereto and/or affixed thereto said display unit, which is adapted for the display of at least one of instantaneous criteria value and timewise variation of the criterion on said display surface.

4. An arrangement according to claim 1, wherein first criteria related to a diagnostic unit, and second criteria related to a therapeutic unit can be presented on a display surface of the display unit;

wherein said first criteria are chosen for display on said display surface as instantaneous values; and

wherein said first criteria are chosen for display on said display surface as timewise variation of the criterion.

5. An arrangement according to claim 1, wherein time axes of selected criteria of at least one of said unit-related criteria and said creature-related criteria chosen to be shown as timewise variation of respective criteria are co-ordinated and arranged in mutually superimposed relationship.

6. An arrangement according to claim 1, wherein signals generated by a measuring probe, a sensor in respect of chosen criteria of said unit-related criteria or said creature-related criteria are time-delayed prior to said chosen criteria being presented on the display surface.

7. An arrangement according to claim 1, wherein instantaneous values and values concerning time related graphs for criteria related to a diagnostic unit and instantaneous value concerning time-related graphs for criteria related to a therapeutic unit can be stored in memories for presentation as timewise variation of the respective criteria.

8. An arrangement according to claim 7, wherein the timewise variation of said respective criteria can be presented in a time compressed form.

9. An arrangement according to claim 2, further comprising an equipment unit including at least said at least one lung ventilator unit and a plurality of said hoses, and wherein a first coupling part of a two-part hose coupling of at least one of said hoses is attached to said equipment unit, and said coupling part is adapted for a co-action with an external hose section for an insufflation gas flow and a plurality of external hose sections.

10. An arrangement according to claim 2, wherein at least one first coupling part of said two-part coupling device is attached to the equipment unit, and wherein said at least one first coupling part is adapted for co-action with a unit for evaluating different criteria, said different criteria including CO₂-content, O₂-content, and/or breathing frequency.

11. An arrangement according to claim 2, wherein the equipment unit has attached thereto at least one two-part electric connector, said electric connector including a first part adapted for co-action with an external electric cable that carries sensor-related electric signals representative of different criteria, said different criteria including at least ECG-values, SpO₂-values, BIS-values, and/or PLET-values.

12. An arrangement according to claim 1, further comprising an equipment unit including at least said at least one lung ventilator unit and a plurality of said hoses, and wherein a first coupling part of a two-part hose coupling of at least one of said hoses is attached to said equipment unit, and said coupling part is adapted for a co-action with an external hose section for an insufflation gas flow and a plurality of external hose sections.