# US 11,433,190 B2 · Method and system for controlling pressurization of a patient cavity using a pressure sensor of a medical appliance

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- Number: US 11,433,190 B2
- Document ID: US11433190B2
- Status: Granted
- Kind: B2
- Application number: 16/206,284
- Filed: 2018-11-30
- Published: 2019-03-28
- Granted: 2022-09-06
- Earliest claimed: 2017-05-31
- Assignees: Lexion Medical, LLC
- Applicants: Lexion Medical, LLC
- Inventors: Carl M. Geisz; Rochelle M. Amann
- Web page: https://patentgrep.com/patent/US11433190B2

## CPC

- A61M 13/003: {Blowing gases other than for carrying powders, e.g. for inflating, dilating or rinsing}
- A61B 17/3474: {Insufflating needles, e.g. Veress needles}
- A61M 39/0247: {Transcutaneous or percutaneous access sites to the inside of the body}
- A61B 2090/064: {for measuring force, pressure or mechanical tension}
- A61M 2016/0027: {pressure meter}
- A61M 2039/0264: {with multiple inlets or multiple outlets}
- A61M 2039/0279: {for introducing medical instruments into the body, e.g. endoscope, surgical tools}
- A61M 2205/16: with back-up system in case of failure
- A61M 2205/3344: Measuring or controlling pressure at the body treatment site
- A61M 2205/3358: Measuring barometric pressure, e.g. for compensation
- A61M 2205/3569: sublocal, e.g. between console and disposable
- A61M 2205/3592: using telemetric means, e.g. radio or optical transmission
- A61M 2205/50: with microprocessors or computers
- A61M 2205/502: User interfaces, e.g. screens or keyboards
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A method comprises positioning a medical appliance having a primary pressure sensor at or within a patient incision site and supplying an insufflation fluid to the patient cavity. The method further comprises measuring a pressure in the patient cavity by the primary pressure sensor and controlling the supply of insufflation fluid by an insufflator to the patient cavity based at least on the measured pressure. The method further comprises determining, by a processor associated with the insufflator, that the measured pressure may be inaccurate and, in response to determining that the measured pressure may be inaccurate, controlling, by the insufflator, the supply of the insufflation fluid to the patient cavity based at least on a pressure measured by a backup pressure sensor.

## Claims

### Claim 1

A system comprising:
a medical appliance;
a primary pressure sensor positioned on, in, or through the medical appliance, the primary pressure sensor configured to determine a pressure of a patient cavity;
a backup pressure sensor; and
an insufflator operable to supply insufflation fluid to the patient cavity, the insufflator being communicatively coupled to the primary pressure sensor, the insufflator comprising:
a processor;
a computer-readable media having logic stored thereon, the logic operable, when executed on the processor, to:
receive one or more signals indicative of pressure measurements from the primary pressure sensor;
control the supply of the insufflation fluid from the insufflator to the patient cavity based at least on the one or more signals indicative of pressure measurements from the primary pressure sensor; and
determine that the one or more signals indicative of pressure measurements from the primary pressure sensor may be inaccurate by determining at least one of:
whether at least one of the one or more received signals indicative of pressure measurements is not within a predefined range of accuracy;
whether any error data is received, the error data indicating at least one of:
an error occurred due to an interference from a power signal;
a wrong number of bits is received;
data is received in a wrong format; or
data is received with an improper spacing;
whether any proper acknowledgment bits are not received;
whether a received signal is not within an expected voltage range; and
whether any updated status bits are not received; and
in response to determining that the one or more signals indicative of pressure measurements from the primary pressure sensor may be inaccurate, control supply of insufflation fluid by the insufflator to the patient cavity based at least on a pressure measured by a backup pressure sensor rather than based on the one or more signals indicative of pressure measurements from the primary pressure sensor.

### Claim 2 (depends on 1)

The system of claim 1, wherein the medical appliance is a trocar.

### Claim 3 (depends on 1)

The system of claim 1, wherein the medical appliance is one of:
a needle;
a stapler;
a grasper;
a pair of scissors;
a scalpel;
a cutter;
an electrode; and
an end seal.

### Claim 4 (depends on 1)

The system of claim 1, wherein the medical appliance is one of:
a multiple access port; and
a single access port.

### Claim 5 (depends on 1)

The system of claim 1, wherein the insufflation fluid is a gas that is supplied to the patient cavity through the medical appliance.

### Claim 6 (depends on 1)

The system of claim 1, wherein the backup pressure sensor is located at one of:
in, on, or through the medical appliance; and
within the insufflator.

### Claim 7 (depends on 1)

The system of claim 1, wherein:
at least one of the primary pressure sensor or the backup pressure sensor is coupled to a cable;
at least a portion of the cable is shielded from electromagnetic frequencies.

### Claim 8 (depends on 1)

The system of claim 1, wherein the insufflator receives the one or more signals indicative of pressure measurements from the primary pressure sensor when the primary pressure sensor is positioned at or within a patient incision site.

### Claim 9

A method comprising:
positioning a medical appliance having a primary pressure sensor at or within a patient incision site;
supplying an insufflation fluid to a patient cavity;
a receiving one or more signals indicative of pressure measurements in the patient cavity by the primary pressure sensor;
controlling the supply of insufflation fluid by an insufflator to the patient cavity based at least on the one or more signals indicative of pressure measurements;
determining, by a processor associated with the insufflator, that the one or more signals indicative of pressure measurements may be inaccurate by determining at least one of:
whether at least one of the one or more of the received signals indicative of pressure measurements is not within a predefined range of accuracy;
whether any error data is received, the error data indicating at least one of:
an error occurred due to an interference from a power signal;
a wrong number of bits is received;
data is received in a wrong format; or
data is received with an improper spacing;
whether any proper acknowledgment bits are not received;
whether a received signal is not within an expected voltage range; and
whether any updated status bits are not received; and
in response to determining that the one or more signals indicative of pressure measurements may be inaccurate, controlling, by the insufflator, the supply of the insufflation fluid to the patient cavity based at least on a pressure measured by a backup pressure sensor.

### Claim 10 (depends on 9)

The method of claim 9, wherein the medical appliance is a trocar.

### Claim 11 (depends on 9)

The method of claim 9, wherein the medical appliance is one of:
a needle;
a stapler;
a grasper;
a pair of scissors;
a scalpel;
a cutter;
an electrode; and
an end seal.

### Claim 12 (depends on 9)

The method of claim 9, wherein the medical appliance is one of:
a multiple access port; and
a single access port.

### Claim 13 (depends on 9)

The method of claim 9, wherein the backup pressure sensor is located in, on, or through the medical appliance.

### Claim 14 (depends on 9)

The method of claim 9, wherein the backup pressure sensor is located within the insufflator.

### Claim 15

An insufflator comprising:
a pressurized fluid source;
a processor; and
a computer-readable media having logic stored thereon, the logic operable, when executed on the processor, to:
receive one or more signals indicative of pressure measurements from a primary pressure sensor positioned on, in, or through a medical appliance, wherein:
the medical appliance is positioned at or within a patient cavity; and
the one or more received signals are indicative of a pressure of the patient cavity;
control a supply of insufflation fluid from the pressurized fluid source to the patient cavity based at least on the one or more signals indicative of pressure measurements from the primary pressure sensor; and
determining that the one or more signals indicative of pressure measurements from the primary pressure sensor may be inaccurate by determining at least one of:
whether at least one of the one or more received signals indicative of pressure measurements is not within a predefined range of accuracy;
whether any error data is received, the error data indicating at least one of:
an error occurred due to an interference from a power signal;
a wrong number of bits is received;
data is received in a wrong format; or
data is received with an improper spacing;
whether any proper acknowledgment bits are not received;
whether a received signal is not within an expected voltage range; and
whether any updated status bits are not received; and
in response to determining that the one or more signals indicative of pressure measurements from the primary pressure sensor may be inaccurate, control the supply of the insufflation fluid by the pressurized fluid source to the patient cavity based at least on a pressure measured by a backup pressure sensor.

### Claim 16 (depends on 15)

The insufflator of claim 15, wherein the medical appliance is a trocar.

### Claim 17 (depends on 16)

The insufflator of claim 16, wherein the medial appliance is one of:
a needle;
a stapler;
a grasper;
a pair of scissors;
a scalpel;
a cutter;
an electrode;
an end seal;
a multiple access port; and
a single access port.

### Claim 18

A computer-readable media having logic stored thereon, the logic operable, when executed on a processor, to:
receive one or more signals indicative of pressure measurements from a primary pressure sensor positioned on, in, or through a medical appliance, the medical appliance being positioned at or within a patient incision site;
control a supply of insufflation fluid to the patient cavity based at least on the one or more received signals indicative of pressure measurements from the primary pressure sensor; and
determining that the one or more signals indicative of pressure measurements from the primary pressure sensor may be inaccurate by determining at least one of:
by determining at least one of:
whether at least one of the one or more received signals indicative of pressure measurements is not within a predefined range of accuracy;
whether any error data is received, the error data indicating at least one of:
an error occurred due to an interference from a power signal;
a wrong number of bits is received;
data is received in a wrong format; or
data is received with an improper spacing;
whether any proper acknowledgment bits are not received;
whether a received signal is not within an expected voltage range; and
whether any updated status bits are not received; and
in response to determining that the one or more signals indicative of pressure measurements from the primary pressure sensor may be inaccurate, control the supply of insufflation fluid to the patient cavity based at least on a pressure measured by a backup pressure sensor.

### Claim 19 (depends on 18)

The computer-readable media claim 18, wherein the medical appliance is a trocar.

### Claim 20 (depends on 18)

The computer-readable media claim 18, wherein the medial appliance is one of:
a needle;
a stapler;
a grasper;
a pair of scissors;
a scalpel;
a cutter;
an electrode;
an end seal;
a GelPort; and
a single access port.