Pressure-maintaining smoke evacuation in an insufflator

• US 10,384,021 B2
• Filed: 09/26/2014
• Issued: 08/20/2019
• Est. Priority Date: 09/27/2013
• Status: Active Grant

• Current Assignee: W.O.M. World Of Medicine Gmbh (Novanta Inc.)
• Original Assignee: W.O.M. World Of Medicine Gmbh (Novanta Inc.)
• Inventors: Koeth, Yves, Stegemann, Sebastian
• Primary Examiner(s): Osinski, Bradley J
• Application Number:
  US15/024,947
• Publication Number:
  US 20160317764A1
• Time in Patent Office: 1,789 Days
• CPC Class Codes: A61B 18/1482 having a long rigid shaft for accessing the inner body transcutaneously in minimal invasive surgery, e.g. laparoscopy
• CPC Class Codes: A61B 18/20 using laser
• CPC Class Codes: A61B 2218/008 for smoke evacuation
• CPC Class Codes: A61B 90/02 Devices for expanding tissue, e.g. skin tissue implements for holding wounds open, surgical tractors A61B17/02; implantable mammary prosthesis A61F2/12; dilators A61M29/00
• CPC Class Codes: A61M 13/003 Blowing gases other than for carrying powders, e.g. for inflating, dilating or rinsing
• CPC Class Codes: A61M 16/16 Devices to humidify the respiration air A61M16/1045 takes precedence
• CPC Class Codes: A61M 16/203 Proportional
• CPC Class Codes: A61M 2202/0225 Carbon oxides, e.g. Carbon dioxide
• CPC Class Codes: A61M 2205/07 having air pumping means
• CPC Class Codes: A61M 2205/3334 Measuring or controlling the flow rate
• CPC Class Codes: A61M 2205/3337 Controlling, regulating pressure or flow by means of a valve by-passing a pump
• CPC Class Codes: A61M 2205/3344 Measuring or controlling pressure at the body treatment site
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/75 with filters

Abstract

The present invention relates to an insufflator with a flue gas extraction, which is configured such that the abdominal pressure remains substantially constant during the extraction process.

Claims

1. An insufflator for minimally invasive surgery, comprising

a) a gas connection with a proportional valve,

b) a supply line with a pressure measurement, filter, and connection to a first trocar,

c) a second trocar with an extraction hose and filter, connected to an extraction device with an adjustable extraction capacity for extracting insufflation gas such that all insufflation gas that is extracted from a body cavity is always discharged to the atmosphere, and

d) an electronic control unit,

wherein the electronic control unit adjusts the extraction device in dependence on the pressure in the supply line.

2. The insufflator of claim 1, wherein the electronic control unit decreases the extraction rate by control of the extraction device, when the pressure in the supply line exceeds a certain threshold value,

and/or

that the electronic control unit increases the extraction rate by control of the extraction device, when the pressure in the supply line falls below a certain threshold value.

3. The insufflator of claim 2, wherein the threshold value for decreasing the extraction rate for the pressure in the supply line is between 60 and 80 mm Hg.

4. The insufflator of claim 2, wherein the threshold value for increasing the extraction rate for the pressure in the supply line is between 0 and 50 mm Hg.

5. The insufflator of claim 1, wherein the extraction device with an adjustable extraction capacity consists of an adjustable suction pump

or

of a suction pump with an adjustable by-pass valve

or

of a suction pump with an additional adjustable proportional valve.

6. The insufflator of claim 1, wherein the extraction device with an adjustable extraction capacity is connected to an external pump, and the extraction capacity is controlled through an adjustable valve.

7. The insufflator of claim 1, wherein an insufflation capacity being adjustable between 0 and 50 l/min.

8. The insufflator of claim 7, wherein an extraction capacity being adjustable between 0 and 20 l/min.

9. The insufflator of claim 8, wherein an extraction capacity being adjustable between 0 and 10 l/min.

10. The insufflator of claim 1, wherein a gas heating device is located in the gas supply line.