CN108652688A - A kind of pneumoperitoneum apparatus and its voltage stabilizing control method with voltage stabilizing function - Google Patents
A kind of pneumoperitoneum apparatus and its voltage stabilizing control method with voltage stabilizing function Download PDFInfo
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- CN108652688A CN108652688A CN201810853240.4A CN201810853240A CN108652688A CN 108652688 A CN108652688 A CN 108652688A CN 201810853240 A CN201810853240 A CN 201810853240A CN 108652688 A CN108652688 A CN 108652688A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/0218—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors for minimally invasive surgery
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/0281—Abdominal wall lifters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/18—Arrangements for supervising or controlling working operations for measuring the quantity of conveyed product
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Abstract
The present invention relates to a kind of pneumoperitoneum apparatus with voltage stabilizing function, including pressure-reduction module, proportioning valve, control unit, air bleeding valve, switch valve, first pressure sensor and second pressure sensor；Further include flow monitoring unit, port corresponding with flow monitoring unit is connected respectively for the proportioning valve, switch valve and air bleeding valve, and flow monitoring unit is electrically connected with control unit.The present invention is then sent in control unit by flow monitoring unit monitoring human abdominal cavity actual pressure and is handled, and it is compared with abdominal cavity actual pressure according to the abdominal pressure of setting by control unit, regulate and control the opening and closing of proportioning valve or air bleeding valve, and it corresponds to and carries out gas injection or exhaust, the voltage stabilizing control method of the present invention is instead of the technical solution for utilizing single baroceptor to judge operative space air pressure size in prior art, not only overcome and sees in prior art delay effect caused by sensor and proportioning valve, and barometric error is small, and the stability of pressure control might as well, facilitate the operation of doctor.
Description
Technical field
The present invention relates to a kind of pneumoperitoneum apparatus, and in particular to a kind of pneumoperitoneum apparatus and its voltage stabilizing controlling party with voltage stabilizing function
Method.
Background technology
In Minimally Invasive Surgery, since the organ of human body or its hetero-organization press together, not enough spaces
Observation and operation, just need pneumoperitoneum apparatus to provide air pressure this when, and inner cavity is supportted greatly, in order to provide suitable operative space and hand
The art visual field, air pressure it is unstable, can bring it is soft tissue be subjected to displacement with the variation of air pressure, influence doctor to operative site
The judgement of exact position, excessively high air pressure can bring some patientss and seriously affect.Existing routine pneumoperitoneum apparatus, air pressure fluctuation
Greatly, therefore, it is provided with higher air pressure, enough operative spaces are provided also to meet in the low ebb of air pressure fluctuation.In order to
Ensure that the safety of operation, the stability for the air pressure that pneumoperitoneum apparatus provides are even more important.
For pneumoperitoneum apparatus, the pneumoperitoneum apparatus in prior art is all to judge operative space using single baroceptor at present
The size of air pressure, and gas injection or tonifying Qi are carried out according to this judgement control proportioning valve.But due to the delay of sensor and proportioning valve
The barometric error of effect, this voltage stabilizing control method is larger, and the stability of pressure control is also poor, it has not been convenient to the hand of doctor
Art.
Invention content
The purpose of the present invention is：It provides one kind to be not only simple in structure, and barometric error is smaller, it is ensured that stable gas pressure,
And facilitate the pneumoperitoneum apparatus and its voltage stabilizing control method with voltage stabilizing function of surgical.
In order to achieve the above object, first technical solution of the invention is：A kind of pneumoperitoneum apparatus with voltage stabilizing function, packet
Pressure-reduction module, proportioning valve, control unit, air bleeding valve, switch valve, first pressure sensor and second pressure sensor are included, it is described
The inlet end of pressure-reduction module is connected to air source, and its outlet side is connected with the inlet end of proportioning valve, the first pressure sensing
Device is located on the pipeline that pressure-reduction module is connected to air source, the proportioning valve, first pressure sensor and second pressure sensor point
Connecting pin electrical connection not corresponding with control unit, the outlet side of the air bleeding valve are connected with air, the outlet side of switch valve
It is connected to human abdominal cavity；Its innovative point is：
Further include flow monitoring unit, the proportioning valve, switch valve and air bleeding valve port corresponding with flow monitoring unit respectively
It is connected, and the connecting pin electrical connection corresponding with control unit of flow monitoring unit.
In above-mentioned first technical solution, the flow monitoring unit include pressure difference filter core, third pressure sensor and
4th pressure sensor, the outlet side of the proportioning valve and the inlet end of air bleeding valve are connected with pressure difference filter core simultaneously, pressure difference filter
The outlet side of core is connected with the inlet end of switch valve, and the third pressure sensor is located at what proportioning valve was connected to pressure difference filter core
On pipeline, and the connecting pin electrical connection corresponding with control unit of third pressure sensor, the 4th pressure sensor are located at pressure
On the pipeline that poor filter core is connected to switch valve, and the connecting pin electrical connection corresponding with control unit of the 4th pressure sensor.
In above-mentioned first technical solution, the pressure-reduction module includes one-level pressure relief valve and second depressurized valve, and described one
The inlet end of grade pressure reducing valve is connected with air source, and outlet side is connected with the inlet end of second depressurized valve, the second depressurized valve
Outlet side be connected with the inlet end of proportioning valve, the first pressure sensor is located at the one-level pressure relief valve and gas of pressure-reduction module
On the pipeline of source connection.
In order to achieve the above object, second technical solution of the invention is：A kind of voltage stabilizing control method of pneumoperitoneum apparatus, packet
Include pneumoperitoneum apparatus, the pneumoperitoneum apparatus include pressure-reduction module, proportioning valve, control unit, air bleeding valve, switch valve, first pressure sensor,
Second pressure sensor and flow monitoring unit, the inlet end of the pressure-reduction module are connected to air source, and its outlet side and ratio
The inlet end of valve is connected, and the first pressure sensor is located on the pipeline that pressure-reduction module is connected to air source, the proportioning valve,
Connecting pin electrical connection corresponding with control unit, the air bleeding valve go out respectively for first pressure sensor and second pressure sensor
Gas end is connected with air, and the outlet side of switch valve is connected to human abdominal cavity, the proportioning valve, switch valve and air bleeding valve respectively with
The corresponding port of flow monitoring unit is connected, and the connecting pin electrical connection corresponding with control unit of flow monitoring unit；
Its innovative point is：The specific steps of pneumoperitoneum apparatus voltage stabilizing control are successively：
Step a, gas injection for the first time, detailed process are：
A1, human body air pressure P1 is output to by described control unit setting,
A2, air source is sent to pressure-reduction module and is depressurized, the actual pressure of air source air pressure is monitored by the first pressure sensor, if gas
The actual pressure of source gas pressure is less than 200Kp, then alarms, and described control unit forbids opening proportioning valve gas injection,
A3, described control unit open proportioning valve and switch valve, and start gas injection timing, are then turned on the monitoring of flow monitoring unit
Real-time traffic V,
Described control unit obtains actual human body abdominal cavity air pressure P2 in real time, if air pressure P2 in actual human body abdominal cavity meets P2=P1-2,
Described control unit closes proportioning valve, and closes gas injection timing, obtains gas injection time T, gas injection rate △ V, gas injection pressure difference △ P are obtained
Obtain Proportional coefficient K=△ V/ △ P；
Step b, cycle voltage stabilizing control, detailed process are：
Regulate and control pressure according to the magnitude relationship for being output to human body air pressure P1 and actual human body abdominal cavity air pressure P2,
If b1, P1 ＞ P2, by described control unit obtain gas injection rate △ V1=（P1-P2）* K, described control unit are opened successively
When proportioning valve, switch valve, flowmeter and flow monitoring unit, and real-time traffic V1 is obtained, and is noted according to T1=△ V/V1
Gas time T1 when reaching gas injection time T1 when flowmeter, then closes proportioning valve and switch valve by control unit,
If b2, P1 ＜ P2, by described control unit obtain capacity △ V2=（P2-P1）* K, described control unit are opened successively
When air bleeding valve, switch valve, flowmeter and flow monitoring unit, and real-time traffic V2 is obtained, and is arranged according to T2=△ V/V2
Gas time T2 when reaching evacuation time T2 when flowmeter, then closes air bleeding valve and switch valve by control unit, completes pneumoperitoneum
The voltage stabilizing of machine controls.
In above-mentioned second technical solution, gas injection rate △ V=V × T-V0 in the step b3, gas injection pressure difference △ P=
P1-2-P0, wherein V0 is the initial tolerance of human abdominal cavity, and V0=0, P0 are human abdominal cavity initial gas pressures, and P0=0.
In above-mentioned second technical solution, the flow monitoring unit include pressure difference filter core, third pressure sensor and
4th pressure sensor, the outlet side of the proportioning valve and the inlet end of air bleeding valve are connected with pressure difference filter core simultaneously, pressure difference filter
The outlet side of core is connected with the inlet end of switch valve, and the third pressure sensor is located at what proportioning valve was connected to pressure difference filter core
On pipeline, and the connecting pin electrical connection corresponding with control unit of third pressure sensor, the 4th pressure sensor are located at pressure
On the pipeline that poor filter core is connected to switch valve, and the connecting pin electrical connection corresponding with control unit of the 4th pressure sensor.
In above-mentioned second technical solution, the pressure-reduction module includes one-level pressure relief valve and second depressurized valve, and described one
The inlet end of grade pressure reducing valve is connected with air source, and outlet side is connected with the inlet end of second depressurized valve, the second depressurized valve
Outlet side be connected with the inlet end of proportioning valve, the first pressure sensor is located at the one-level pressure relief valve and gas of pressure-reduction module
On the pipeline of source connection.
Good effect possessed by the present invention is：Pneumoperitoneum apparatus using the present invention with voltage stabilizing function further includes flow prison
Unit is surveyed, port corresponding with flow monitoring unit is connected respectively for the proportioning valve, switch valve and air bleeding valve, and flow monitoring
Unit connecting pin electrical connection corresponding with control unit, in pneumoperitoneum apparatus in use, monitoring human abdominal cavity by flow monitoring unit
Actual pressure is then sent in control unit and is handled, and by control unit according to the abdominal pressure and the practical pressure in abdominal cavity of setting
Power compares, and regulates and controls the opening and closing of proportioning valve or air bleeding valve, and corresponding carries out gas injection or exhaust, it is ensured that abdominal cavity actual pressure with
The abdominal pressure of setting reaches balance, it is ensured that the stability of abdominal cavity actual pressure facilitates the operation of doctor；Gas using the present invention
The voltage stabilizing control method of abdomen machine, the specific steps that the pneumoperitoneum apparatus voltage stabilizing controls are successively：
Step a, gas injection for the first time, detailed process are：
A1, human body air pressure P1 is output to by described control unit setting,
A2, air source is sent to pressure-reduction module and is depressurized, the actual pressure of air source air pressure is monitored by the first pressure sensor, if gas
The actual pressure of source gas pressure is less than 200Kp, then alarms, and described control unit forbids opening proportioning valve gas injection,
A3, described control unit open proportioning valve and switch valve, and start gas injection timing, are then turned on the monitoring of flow monitoring unit
Real-time traffic V,
Described control unit obtains actual human body abdominal cavity air pressure P2 in real time, if air pressure P2 in actual human body abdominal cavity meets P2=P1-2,
Described control unit closes proportioning valve, and closes gas injection timing, obtains gas injection time T, gas injection rate △ V, gas injection pressure difference △ P are obtained
Obtain Proportional coefficient K=△ V/ △ P；
Step b, cycle voltage stabilizing control, detailed process are：
Regulate and control pressure according to the magnitude relationship for being output to human body air pressure P1 and actual human body abdominal cavity air pressure P2,
If b1, P1 ＞ P2, by described control unit obtain gas injection rate △ V1=（P1-P2）* K, described control unit are opened successively
When proportioning valve, switch valve, flowmeter and flow monitoring unit, and real-time traffic V1 is obtained, and is noted according to T1=△ V/V1
Gas time T1 when reaching gas injection time T1 when flowmeter, then closes proportioning valve and switch valve by control unit,
If b2, P1 ＜ P2, by described control unit obtain capacity △ V2=（P2-P1）* K, described control unit are opened successively
When air bleeding valve, switch valve, flowmeter and flow monitoring unit, and real-time traffic V2 is obtained, and is arranged according to T2=△ V/V2
Gas time T2 when reaching evacuation time T2 when flowmeter, then closes air bleeding valve and switch valve by control unit, completes pneumoperitoneum
The voltage stabilizing of machine controls, and method of the invention is more reasonable, utilizes single baroceptor to judge operation instead of in prior art
The technical solution of space air pressure size not only overcomes in prior art delay effect caused by sensor and proportioning valve,
And barometric error is small, precision is high and the stability of pressure control, facilitates the operation of doctor.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of specific implementation mode of pneumoperitoneum apparatus that the present invention carries voltage stabilizing function；
Fig. 2 is the flow diagram of gas injection for the first time of the invention；
Fig. 3 is the flow diagram of present invention cycle voltage stabilizing control；
Fig. 4 is the pressure of inventive flow monitoring unit and the curve graph of discharge relation.
Specific implementation mode
Below in conjunction with attached drawing and the embodiment provided, the present invention is further illustrated, and however, it is not limited to this.
Embodiment 1
As shown in Figure 1, a kind of pneumoperitoneum apparatus with voltage stabilizing function, including pressure-reduction module 1, proportioning valve 2, control unit 3, air bleeding valve
4, switch valve 5, first pressure sensor 6 and second pressure sensor 7, the inlet end of the pressure-reduction module 1 are connected to air source, and
Its outlet side is connected with the inlet end of proportioning valve 2, and the first pressure sensor 6 is located at what pressure-reduction module 1 was connected to air source
On pipeline, the connection corresponding with control unit 3 respectively of the proportioning valve 2, first pressure sensor 6 and second pressure sensor 7
End electrical connection, the outlet side of the air bleeding valve 4 are connected with air, and the outlet side of switch valve 5 is connected to human abdominal cavity；
Further include flow monitoring unit 8, the proportioning valve 2, switch valve 5 and air bleeding valve 4 are corresponding with flow monitoring unit 8 respectively
Port is connected, and the connecting pin electrical connection corresponding with control unit 3 of flow monitoring unit 8.
As shown in Figure 1, in order to enable structure of the invention is reasonable, the flow monitoring unit 8 includes pressure difference filter core 81, third
Pressure sensor 82 and the 4th pressure sensor 83, the outlet side of the proportioning valve 2 and the inlet end of air bleeding valve 4 while and pressure difference
Filter core 81 is connected, and the outlet side of pressure difference filter core 81 is connected with the inlet end of switch valve 5, and the third pressure sensor 82 is set
On the pipeline that proportioning valve 2 is connected to pressure difference filter core 81, and the connecting pin electricity corresponding with control unit 3 of third pressure sensor 82
Connection, the 4th pressure sensor 83 is located on the pipeline that pressure difference filter core 81 is connected to switch valve 5, and the 4th pressure sensor
83 connecting pin electrical connections corresponding with control unit 3.
Certainly, the structure of the flow monitoring unit 8 is not limited thereto, and other structures form can also be used to realize stream
Amount monitoring, for example, selection flow sensor equally can also realize monitoring flow purpose.
As shown in Figure 1, in order to enable the present invention effect of easing stress it is good, be depressured by two-stage, the pressure-reduction module 1 include one
Grade pressure reducing valve 11 and second depressurized valve 12, the inlet end of the one-level pressure relief valve 11 are connected with air source, and outlet side subtracts with two level
The inlet end of pressure valve 12 is connected, and the outlet side of the second depressurized valve 12 is connected with the inlet end of proportioning valve 2, and described first
Pressure sensor 6 is located on the pipeline that the one-level pressure relief valve 11 of pressure-reduction module 1 is connected to air source.
Embodiment 1 is then sent in use, monitoring human abdominal cavity actual pressure by flow monitoring unit in control unit
It is handled, and is compared with abdominal cavity actual pressure according to the abdominal pressure of setting by control unit, regulate and control proportioning valve or air bleeding valve
Opening and closing, and corresponding carry out gas injection or exhaust, it is ensured that abdominal cavity actual pressure and the abdominal pressure of setting reach balance, really
The stability for protecting abdominal cavity actual pressure, facilitates the operation of doctor.
Embodiment 2
As shown in Figure 1,2,3, 4, the voltage stabilizing control method of a kind of pneumoperitoneum apparatus, including pneumoperitoneum apparatus, the pneumoperitoneum apparatus include decompression mould
Block 1, proportioning valve 2, control unit 3, air bleeding valve 4, switch valve 5, first pressure sensor 6, second pressure sensor 7 and flow prison
Unit 8 is surveyed, the inlet end of the pressure-reduction module 1 is connected to air source, and its outlet side is connected with the inlet end of proportioning valve 2, institute
It states first pressure sensor 6 to be located on the pipeline that pressure-reduction module 1 is connected to air source, the proportioning valve 2, first pressure sensor 6
With the connecting pin electrical connection corresponding with control unit 3 respectively of second pressure sensor 7, the outlet side of the air bleeding valve 4 and air
It is connected, the outlet side of switch valve 5 is connected to human abdominal cavity, and the proportioning valve 2, switch valve 5 and air bleeding valve 4 are supervised with flow respectively
It surveys 8 corresponding port of unit to be connected, and the connecting pin electrical connection corresponding with control unit 3 of flow monitoring unit 8；
The specific steps of pneumoperitoneum apparatus voltage stabilizing control are successively：
Step a, gas injection for the first time, detailed process are：
A1, human body air pressure P1 is output to by the setting of described control unit 3,
A2, air source is sent to pressure-reduction module 1 and is depressurized, the actual pressure of air source air pressure is monitored by the first pressure sensor 6, if
The actual pressure of air source air pressure is less than 200Kp, then alarms, and described control unit 3 forbids opening 2 gas injection of proportioning valve,
A3, described control unit 3 open proportioning valve 2 and switch valve 5, and start gas injection timing, are then turned on flow monitoring unit 8
Real-time traffic V is monitored,
Described control unit 3 obtains actual human body abdominal cavity air pressure P2 in real time, if air pressure P2 in actual human body abdominal cavity meets P2=P1-2,
Then described control unit closes proportioning valve 2, and closes gas injection timing, obtains gas injection time T, gas injection rate △ V, gas injection pressure difference △ P,
Obtain Proportional coefficient K=△ V/ △ P；
Gas injection rate △ V=V × T-V0 in the step b3, gas injection pressure difference △ P=P1-2-P0, wherein V0 is that human abdominal cavity is initial
Tolerance, and V0=0, P0 are human abdominal cavity initial gas pressures, and P0=0；
Step b, cycle voltage stabilizing control, detailed process are：
Regulate and control pressure according to the magnitude relationship for being output to human body air pressure P1 and actual human body abdominal cavity air pressure P2,
If b1, P1 ＞ P2, gas injection rate △ V1=P1-P2*K are obtained by described control unit 3, described control unit 3 is opened successively
When proportioning valve 2, switch valve 5, flowmeter and flow monitoring unit 8, and real-time traffic V1 is obtained, and is obtained according to T1=△ V/V1
To gas injection time T1, when reaching gas injection time T1 when flowmeter, then proportioning valve 2 and switch valve 5 are closed by control unit 3,
If b2, P1 ＜ P2, capacity △ V2=P2-P1*K are obtained by described control unit 3, described control unit 3 is opened successively
When air bleeding valve 4, switch valve 5, flowmeter and flow monitoring unit 8, and real-time traffic V2 is obtained, and is obtained according to T2=△ V/V2
To evacuation time T2, when reaching evacuation time T2 when flowmeter, then air bleeding valve 4 and switch valve 5 are closed by control unit 3, it is complete
It is controlled at the voltage stabilizing of pneumoperitoneum apparatus.
As shown in Figure 1, in order to enable the present invention structure is compacter, reasonable and production cost is low, the flow prison
It includes pressure difference filter core 81, third pressure sensor 82 and the 4th pressure sensor 83, the outlet side of the proportioning valve 2 to survey unit 8
It is connected simultaneously with pressure difference filter core 81 with the inlet end of air bleeding valve 4, the outlet side of pressure difference filter core 81 and the inlet end phase of switch valve 5
Connection, the third pressure sensor 82 is located on the pipeline that proportioning valve 2 is connected to pressure difference filter core 81, and third pressure sensor
82 connecting pin electrical connections corresponding with control unit 3, the 4th pressure sensor 83 are located at pressure difference filter core 81 and connect with switch valve 5
On logical pipeline, and the connecting pin electrical connection corresponding with control unit 3 of the 4th pressure sensor 83.
As shown in Figure 1, in order to enable effect of easing stress is good, the present invention is depressured using two-stage, and the pressure-reduction module 1 includes level-one
Pressure reducing valve 11 and second depressurized valve 12, the inlet end of the one-level pressure relief valve 11 are connected with air source, outlet side and second depressurized
The inlet end of valve 12 is connected, and the outlet side of the second depressurized valve 12 is connected with the inlet end of proportioning valve 2, first pressure
Force snesor 6 is located on the pipeline that the one-level pressure relief valve 11 of pressure-reduction module 1 is connected to air source.
As shown in figure 4, the pressure difference filter core 81 of flow monitoring unit 8 is the filter bed of essence fibre web of dry state, it being capable of stop portions gas
Body, can before and after filter core one draught head of generation, gas flow is bigger, and draught head is bigger.
The characteristics of according to pressure difference filter core, the size of gas flow can be detected.The range of flow of pneumoperitoneum apparatus in 50L hereinafter,
According to Fig. 4, within the scope of 0~50L, the curve of pressure difference filter core is intended to straight line, and when flow is 50L, pressure 6.5kPa can
To calculate proportionality coefficient k1=flow/pressure=7.7.The pressure of two pressure sensors before and after pressure difference filter core can be passed through
Force difference calculates the size of flow at that time.
When inflating first time, initial volume v0=0, initial gas pressure P0=0, proportionality coefficient is in gas replenishment process
K2=Δ v/ Δ p, flow monitoring unit can calculate the volume in injection abdominal cavity, both volume=flow * times.Pass through calculating again
Formula can calculate the value of k2（Under same surgical environments, scalefactor value is fixed）.
When Minimally Invasive Surgery, abdominal cavity is not a closed space, has exhaust situation at the uniform velocity, when intraperitoneal gas
When pressure is less than setting air pressure 2mmHg, according to formula k2=Δ v/ Δs p（Δp=2mmHg）, can directly calculate current needs
Gas injection rate, system give abdominal cavity tonifying Qi, gas to pass through flow monitoring unit, the note specifically needed can be calculated according to uninterrupted
The gas time.
It illustrates：
1, it is assumed that setting abdominal cavity, air pressure P1 are 12（mmhg）, abdominal cavity gas volume is 0 at this time,
2, proportioning valve and switch valve are fully opened, gas injection is started, starts timing, according to the spy of flow monitoring unit pressure difference filter core
Point, filter core Proportional coefficient K=flow/pressure difference=7.7,
3, the difference of the baroceptor of the both sides of pressure difference filter core is 5kp,
4, gas flow is V=5 × K=5*7.7=38.5L/min when proportioning valve is opened completely,
5, baroceptor, which detects, stops timing when abdominal cavity air pressure is (P1-2mmhg), close proportioning valve, i.e. 10mmhg, timing
T=3.9s,
6, gas injection rate V1=T/60 × V=3.9/60*38.5=2.5L is calculated,
7, calculate abdominal cavity proportionality coefficient Q=Δ v/ Δ p, Δ v=2.5L (initial volume 0)；(initial gas pressure is Δ p=10mmhg
0),
The L/mmhg of Q=2.5/10=0.25, Q is fixed value in the same surgical environments
8, our actual pressures are 10mmhg at this time, are calculated according to Q=Δ v/ Δ p apart from the also poor 2mmhg of setting value：
Δv=Δp*Q=2*0.25=0.5L
9, proportioning valve is opened, opening degree 50%, small flow gas injection, opens timing,
10, the both sides draught head of pressure difference filter core is 1.8Kp, calculates outflow V=1.8*7.7=13.86L/min=0.231/s,
11, gas injection time T=0.5/0.231=2.16s is calculated,
12, after to wait for timing time be 2.16s, proportioning valve, i.e. gas injection 0.5L are closed, abdominal cavity air pressure is 12mmhg at this time,
13, since abdominal cavity is not the environment of a sealing, the case where having gas leakage, after when abdominal cavity, air pressure drops to 11mmhg,
Proportioning valve, opening degree 50%, T=0.231 × 0.25=1.08s, i.e. after gas injection 1.08s are opened in Δ v=1 × 0.25=0.25L
Proportioning valve is closed, abdominal cavity air pressure rises to 12mmhg,
14, the abdominal cavity air pressure increase when there is external force influence, after reaching 13mmhg, unlatching air bleeding valve, beginning timing, Δ v=
Δ p*Q=1 × 0.25=0.25L,
15, air bleeding valve is opened, and flow monitoring unit is started to work, and the pressure difference for calculating pressure difference filter core both sides is 4kp, is calculated
When exhaust flow be V=4 × 7.7=30.8L/min, i.e. 0.51L/s,
16, it is T=Δ v/V=0.25/0.51=0.49s to calculate evacuation time, that is, after being vented 0.49s, closes air bleeding valve, at this time
Air pressure drops to 12mmhg.
The method of the present invention is more reasonable, judges operative space gas using single baroceptor instead of in prior art
The technical solution for pressing size not only overcomes in prior art delay effect caused by sensor and proportioning valve, Er Qieqi
Hold up that the small, precision of difference is high and the stability of pressure control might as well, greatly facilitate the operation of doctor.
It is enlightenment with above-mentioned desirable embodiment according to the present invention, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to determine its technical scope according to right.
Claims (7)
1. a kind of pneumoperitoneum apparatus with voltage stabilizing function, including pressure-reduction module（1）, proportioning valve（2）, control unit（3）, air bleeding valve
（4）, switch valve（5）, first pressure sensor（6）With second pressure sensor（7）, the pressure-reduction module（1）Inlet end with
Air source is connected to, and its outlet side and proportioning valve（2）Inlet end be connected, the first pressure sensor（6）It is located at decompression mould
Block（1）On the pipeline being connected to air source, the proportioning valve（2）, first pressure sensor（6）With second pressure sensor（7）Point
Not and control unit（3）Corresponding connecting pin electrical connection, the air bleeding valve（4）Outlet side be connected with air, switch valve（5）
Outlet side be connected to human abdominal cavity；It is characterized in that：
It further include flow monitoring unit（8）, the proportioning valve（2）, switch valve（5）And air bleeding valve（4）Respectively with flow monitoring list
Member（8）Corresponding port is connected, and flow monitoring unit（8）With control unit（3）Corresponding connecting pin electrical connection.
2. the pneumoperitoneum apparatus according to claim 1 with voltage stabilizing function, it is characterised in that：The flow monitoring unit（8）
Including pressure difference filter core（81）, third pressure sensor（82）With the 4th pressure sensor（83）, the proportioning valve（2）Outlet side
And air bleeding valve（4）Inlet end simultaneously with pressure difference filter core（81）It is connected, pressure difference filter core（81）Outlet side and switch valve（5）'s
Inlet end is connected, the third pressure sensor（82）It is located at proportioning valve（2）With pressure difference filter core（81）On the pipeline of connection, and
Third pressure sensor（82）With control unit（3）Corresponding connecting pin electrical connection, the 4th pressure sensor（83）It is located at
Pressure difference filter core（81）With switch valve（5）On the pipeline of connection, and the 4th pressure sensor（83）With control unit（3）Connect accordingly
Connect end electrical connection.
3. the pneumoperitoneum apparatus according to claim 1 with voltage stabilizing function, it is characterised in that：The pressure-reduction module（1）Including
One-level pressure relief valve（11）With second depressurized valve（12）, the one-level pressure relief valve（11）Inlet end be connected with air source, outlet side
With second depressurized valve（12）Inlet end be connected, the second depressurized valve（12）Outlet side and proportioning valve（2）Inlet end
It is connected, the first pressure sensor（6）It is located at pressure-reduction module（1）One-level pressure relief valve（11）The pipeline being connected to air source
On.
4. a kind of voltage stabilizing control method of pneumoperitoneum apparatus, including pneumoperitoneum apparatus, the pneumoperitoneum apparatus include pressure-reduction module（1）, proportioning valve
（2）, control unit（3）, air bleeding valve（4）, switch valve（5）, first pressure sensor（6）, second pressure sensor（7）And flow
Monitoring unit（8）, the pressure-reduction module（1）Inlet end be connected to air source, and its outlet side and proportioning valve（2）Inlet end phase
Connection, the first pressure sensor（6）It is located at pressure-reduction module（1）On the pipeline being connected to air source, the proportioning valve（2）,
One pressure sensor（6）With second pressure sensor（7）Respectively with control unit（3）Corresponding connecting pin electrical connection, the row
Air valve（4）Outlet side be connected with air, switch valve（5）Outlet side be connected to human abdominal cavity, the proportioning valve（2）, open
Close valve（5）And air bleeding valve（4）Respectively with flow monitoring unit（8）Corresponding port is connected, and flow monitoring unit（8）With control
Unit processed（3）Corresponding connecting pin electrical connection；
It is characterized in that：The specific steps of pneumoperitoneum apparatus voltage stabilizing control are successively：
Step a, gas injection for the first time, detailed process are：
A1, by described control unit（3）Setting is output to human body air pressure P1,
A2, air source is sent to pressure-reduction module（1）Decompression, by the first pressure sensor（6）Monitor the practical pressure of air source air pressure
Power is alarmed, and described control unit if the actual pressure of air source air pressure is less than 200Kp（3）Forbid opening proportioning valve
（2）Gas injection,
A3, described control unit（3）Open proportioning valve（2）And switch valve（5）, and start gas injection timing, it is then turned on flow prison
Survey unit（8）Real-time traffic V is monitored,
Described control unit（3）Actual human body abdominal cavity air pressure P2 is obtained in real time, if air pressure P2 in actual human body abdominal cavity meets P2=P1-
2, then described control unit close proportioning valve（2）, and gas injection timing is closed, obtain gas injection time T, gas injection rate △ V, gas injection pressure difference
△ P obtain Proportional coefficient K=△ V/ △ P；
Step b, cycle voltage stabilizing control, detailed process are：
Regulate and control pressure according to the magnitude relationship for being output to human body air pressure P1 and actual human body abdominal cavity air pressure P2,
If b1, P1 ＞ P2, by described control unit（3）Acquisition gas injection rate △ V1=（P1-P2）* K, described control unit（3）According to
Secondary unlatching proportioning valve（2）, switch valve（5）, flowmeter when and flow monitoring unit（8）, and real-time traffic V1 is obtained, and according to
T1=△ V/V1 obtain gas injection time T1, when reaching gas injection time T1 when flowmeter, then by control unit（3）Close proportioning valve
（2）And switch valve（5）,
If b2, P1 ＜ P2, by described control unit（3）Acquisition capacity △ V2=（P2-P1）* K, described control unit（3）According to
Secondary unlatching air bleeding valve（4）, switch valve（5）, flowmeter when and flow monitoring unit（8）, and real-time traffic V2 is obtained, and according to
T2=△ V/V2 obtain evacuation time T2, when reaching evacuation time T2 when flowmeter, then by control unit（3）Close air bleeding valve
（4）And switch valve（5）, complete the voltage stabilizing control of pneumoperitoneum apparatus.
5. the voltage stabilizing control method of pneumoperitoneum apparatus according to claim 4, it is characterised in that：Gas injection rate in the step b3
△ V=V × T-V0, gas injection pressure difference △ P=P1-2-P0, wherein V0 is the initial tolerance of human abdominal cavity, and V0=0, P0 are human abdominal cavities
Initial gas pressure, and P0=0.
6. the voltage stabilizing control method of pneumoperitoneum apparatus according to claim 4, it is characterised in that：The flow monitoring unit（8）
Including pressure difference filter core（81）, third pressure sensor（82）With the 4th pressure sensor（83）, the proportioning valve（2）Outlet side
And air bleeding valve（4）Inlet end simultaneously with pressure difference filter core（81）It is connected, pressure difference filter core（81）Outlet side and switch valve（5）'s
Inlet end is connected, the third pressure sensor（82）It is located at proportioning valve（2）With pressure difference filter core（81）On the pipeline of connection, and
Third pressure sensor（82）With control unit（3）Corresponding connecting pin electrical connection, the 4th pressure sensor（83）It is located at
Pressure difference filter core（81）With switch valve（5）On the pipeline of connection, and the 4th pressure sensor（83）With control unit（3）Connect accordingly
Connect end electrical connection.
7. the voltage stabilizing control method of pneumoperitoneum apparatus according to claim 4, it is characterised in that：The pressure-reduction module（1）Including
One-level pressure relief valve（11）With second depressurized valve（12）, the one-level pressure relief valve（11）Inlet end be connected with air source, outlet side
With second depressurized valve（12）Inlet end be connected, the second depressurized valve（12）Outlet side and proportioning valve（2）Inlet end
It is connected, the first pressure sensor（6）It is located at pressure-reduction module（1）One-level pressure relief valve（11）The pipeline being connected to air source
On.
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| CN113188054A (en) * | 2021-05-19 | 2021-07-30 | 华东师范大学 | Secondary gas taking device for hazardous gas |
| CN114403957A (en) * | 2022-03-29 | 2022-04-29 | 广东欧谱曼迪科技有限公司 | Pneumoperitoneum machine working mode automatic switching method, electronic equipment, device and pneumoperitoneum machine |
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