Insufflator Smoke Evacuation Pressure Control Patents 2026
Insufflator Smoke Evacuation Pressure Control Patents
Automatic smoke evacuation with integrated insufflation pressure control has evolved from passive flow-regulating filters to AI-assisted, sensor-driven closed-loop systems. This dataset spans 60+ records across 10 jurisdictions from 1988 to early 2026.
From Passive Filters to Closed-Loop Pressure Control
The core engineering challenge is the pressure-flow dilemma: evacuating smoke from a pressurized pneumoperitoneum inherently removes insufflation gas, risking peritoneal collapse. Solutions range from passive calibrated-restriction filters exploiting natural cavity overpressure of 0.5–30 mmHg to active systems with simultaneous closed-loop insufflation replenishment.
Five technical sub-domains are identifiable in this dataset: passive pressure-balanced evacuation, active coupled insufflation-evacuation, exhaust-line pressure sensing, energy-instrument-triggered automatic control, and AI and imaging-assisted dynamic control. Operating pressure targets consistently cluster around the 9–15 mmHg clinical window for laparoscopic CO₂ pneumoperitoneum.
The earliest filings date to 1988 when Goodson established closed-circuit CO₂ recirculation with a dedicated pump, pressure sensor, bacteria filter, and make-up insufflation supply. By 2006–2007, I.C. Medical had filed integrated automatic smoke evacuator-insufflator systems globally via PCT, introducing vacuum sensor safety interlocks to prevent tissue invagination.
The most recent 2021–2026 filings show convergence with robotics (Verb Surgical EP 2025), AI/ML smoke quantification (Covidien EP/US 2023), and ESU impedance-based suction control (Intuitive Surgical US 2026). In this dataset, 12 distinct assignees hold identifiable records, with CooperSurgical/JLJ carrying the largest filing count in retrieved records at approximately 18 filings.
Technology Cluster Distribution and Filing Activity Over Time
Patent activity in this dataset spans five technology sub-domains and four decades, with a clear acceleration in active-control and intelligent-automation filings from 2014 onward. The two charts below illustrate cluster-level distribution and decade-by-decade filing intensity in retrieved records.
Patent Records by Technology Cluster (Dataset Snapshot)
In this dataset, passive pressure-balanced evacuation and active coupled insufflation-evacuation together account for the majority of records, with intelligent and sensor-fused control emerging as the fastest-growing cluster since 2020.
↗ Click bars to exploreFiling Activity by Decade — Retrieved Records
Filing activity in this dataset shows a marked step-up from the 2010–2019 decade onward, with the 2020–2026 partial decade already producing a concentration of high-complexity active-control and AI-integration records.
↗ Click bars to exploreKey Application Domains for Smoke Evacuation Pressure Control Technology
Across the retrieved records, this technology is deployed in four distinct surgical and occupational contexts, each with specific pressure and flow requirements traced to named filings and clinical studies.
Laparoscopic General Surgery
The dominant application domain across this dataset, targeting the 9–15 mmHg operating pressure window of CO₂ pneumoperitoneum laparoscopy. Fisher & Paykel Healthcare (US 2023) integrates smoke evacuation discharge limbs with humidified insufflation in a tandem sub-system architecture. ConMed Corporation (US 2020) and W.O.M. World of Medicine GmbH (US 2021) also filed multi-generation systems specifically for this domain.
Minimally Invasive SurgeryRobotic-Assisted Surgical Platforms
Verb Surgical Inc. (EP 2025) describes a robotic system where the processor controlling the robotic arm also controls the insufflator based on detected smoke conditions, establishing unified robotic-surgical control architecture. Intuitive Surgical Operations (US 2021–2026) embeds ESU-coupled smoke evacuation within a robotic suite, using real-time electrical impedance at the tool tip to estimate smoke generation rate and modulate suction with surgeon-adjustable sensitivity parameters.
Robotic SurgeryGynecologic Laparoscopy Procedures
Multiple retrieved records explicitly identify gynecologic laparoscopy as a domain generating excessive smoke volumes, driving heightened demand for effective evacuation. Passive filter systems from JLJ Medical Devices International and CooperSurgical were designed with this application in mind, with Schultz (CA 2005) specifically addressing this domain. The broad JLJ/CooperSurgical passive system portfolio—spanning US, EP, AU, CA, WO, and IL—was built substantially around gynecologic procedure requirements.
Gynecologic SurgeryOR Occupational Safety & Air Quality
A 2022 clinical study retrieved in this dataset found that integrated aspirator systems achieved up to approximately 100% volatile organic compound capture efficiency versus 53% for standard suction. A 2021 study compared AirSeal and homemade devices for CO₂ environmental dispersion control in laparoscopic surgery, with the AirSeal system demonstrating an average ≥95% reduction in particle distribution within the surgical cavity in 5.64 minutes. COVID-19-era regulatory interest has accelerated adoption pressure on validated evacuation systems.
Occupational SafetyKey Patent Assignees in Smoke Evacuation Pressure Control (Retrieved Records)
In this dataset, CooperSurgical/JLJ holds the largest filing count at approximately 18 records in retrieved records, concentrated in passive pressure-balanced systems across six jurisdictions. SurgiQuest/ConMed follows with approximately 10 records in retrieved records, representing the most active multi-generation active-system portfolio.
Top Assignees by Filing Count — Smoke Evacuation Patents (Dataset Snapshot)
↗ Click bars to exploreCooperSurgical / JLJ Medical Devices
Holds the largest filing count in this dataset at approximately 18 records, spanning US, EP, AU, CA, WO, and IL jurisdictions from 1999 through 2010. The portfolio is concentrated on passive pressure-balanced smoke evacuation systems using calibrated flow-regulating filters that exploit natural cavity overpressure of 0.5–30 mmHg without vacuum. The majority of the JLJ/CooperSurgical passive system filings in this dataset show inactive legal status, reflecting a broad foundation patent strategy for a single core concept prosecuted across many jurisdictions.
United StatesSurgiQuest / ConMed Corporation
Holds approximately 10 records in this dataset, covering WO (2014), EP (2015), and multiple US filings (2016–2024), making it the most active multi-generation active-system filer in retrieved records. The portfolio covers dual- and tri-lumen cannula systems integrating evacuation and insufflation fluid paths, with active prosecution simultaneously across US, EP, AU, and CA. ConMed acquired SurgiQuest, continuing prosecution through at least US 2024 filings on laparoscopic smoke evacuation methods.
United StatesFive Emerging Directions in Smoke Evacuation Control (2021–2026 Filings)
The most recent filings in this dataset (2021–2026) identify five convergent innovation signals: robotic platform integration, ML-based smoke quantification, ESU impedance sensing, modular multi-tool systems, and constant-pressure variable-flow integrated insufflators from Chinese assignees.
Robotic Integration of Insufflation-Evacuation Control
Verb Surgical’s EP 2025 filing describes a surgical robotic system in which a single processor controls both the robotic arm and the insufflator based on smoke detection, establishing a unified platform-level control architecture. This positions smoke evacuation as a core robotic surgery function rather than a peripheral add-on. Intuitive Surgical’s concurrent US 2021–2026 filings embed ESU-coupled evacuation within a robotic surgical suite with surgeon-adjustable sensitivity parameters.
Machine Learning Smoke Quantification for Dynamic Suction
Covidien’s 2023 US and EP filings describe a machine learning network that classifies smoke quantity from intraoperative camera images and dynamically adjusts vacuum pressure, replacing fixed set-point control with continuous data-driven modulation. This approach decouples smoke detection from the insufflator circuit entirely, enabling suction modulation based on real-time image analysis without a dedicated smoke sensor. The system can distinguish smoke intensity levels and scale suction flow proportionally.
Passive Pressure-Balanced vs. Active Coupled Insufflation-Evacuation Systems
Click any row to explore further.
| Dimension | Passive Pressure-Balanced | Active Coupled Insufflation-Evacuation |
|---|---|---|
| Mechanism | Calibrated flow-regulating filter; cavity overpressure drives gas through filter to ambient without vacuum | Electronic/pneumatic coupling of evacuator and insufflator; gas removed is simultaneously replaced at matched volumetric flow rate |
| Pressure Range | Exploits 0.5–30 mmHg natural cavity overpressure; no active pressure generation | Pressure sensors in cavity detect over/under-pressure; modulates both evacuation vacuum and insufflation supply; target 9–15 mmHg |
| Flow Rate | 0.2–30 L/min governed by filter resistance; no vacuum source required | Evacuation and insufflation flows matched; electrocautery applications may require 30–50+ L/min replenishment |
| Safety Interlocks | Filter resistance limits pneumoperitoneum loss; no active interlock circuitry required | Vacuum sensor shuts off evacuator if tissue is invaginated; pressure sensor halts insufflation if pressure becomes excessive |
| Representative Assignees | CooperSurgical/JLJ (~18 records in dataset), Surgin Surgical Instrumentation (WO/US 2003) | I.C. Medical (~7 records), W.O.M. World of Medicine GmbH (~3 records, US patents granted 2016 and 2019) |
| Patent Status (Dataset) | Majority of CooperSurgical/JLJ passive filings show inactive legal status in this dataset | W.O.M. US 9,750,914 family reported as still active; I.C. Medical CA (2014) and JP (2017) reported as active |
| Vacuum Source | None required; ambient atmosphere serves as low-pressure sink | Dedicated pump or insufflator with active vacuum generation and flow rate control |
| Jurisdictions | US, EP, AU, CA, WO, IL (JLJ/CooperSurgical multi-jurisdiction strategy) | US, WO, EP, AU, CA, JP (I.C. Medical PCT strategy); US (W.O.M., Germany priority dates 2014) |
Frequently Asked Questions: Insufflator Smoke Evacuation Pressure Control Patents
The pressure-flow dilemma refers to the fact that evacuating smoke from a pressurized pneumoperitoneum inherently removes insufflation gas, risking peritoneal collapse and patient harm. Solutions range from passive calibrated-restriction filters that limit gas loss to active coupled systems that replace gas at the same volumetric flow rate as it is removed, maintaining cavity pressure in the clinically safe 9–15 mmHg range.
In this dataset, the earliest filings date to 1988 (Goodson, James H., AU/US jurisdictions), establishing the foundational concept of closed-circuit CO₂ recirculation with a dedicated pump, pressure sensor, bacteria filter, and insufflator makeup supply to maintain abdominal distension during laser laparoscopy.
W.O.M. World of Medicine GmbH (Germany) filed US patents (priority dates from Germany, 2014; granted 2016 and 2019) on pressure-maintaining integrated insufflator smoke evacuation that introduces empirical safety factors to prevent evacuation flow from exceeding maximum insufflation capacity. This is an active approach coordinating insufflation replenishment with evacuation, distinct from passive filter systems that rely only on cavity overpressure.
Intuitive Surgical’s US patent (published 2026) uses real-time electrical impedance measurement at the electrosurgical tool tip to estimate the smoke generation rate. The system controls suction flow proportionally to the impedance-derived smoke estimate, eliminating the need for separate optical smoke sensing hardware. The insufflation is simultaneously matched to maintain cavity pressure.
A 2022 study retrieved in this dataset found that integrated aspirator systems achieved up to approximately 100% volatile organic compound capture efficiency, compared to 53% for standard suction. A 2021 study reported that the AirSeal system achieved an average ≥95% reduction in surgical smoke particle distribution within the surgical cavity in 5.64 minutes. COVID-19-era concerns have accelerated regulatory interest in mandatory smoke evacuation.
In this dataset, CTC Medical Technology (Beijing) Co., Ltd. has filed automatic energy-instrument-triggered smoke exhaust system patents in EP (2024) and US (2025), and Nanjing Tuge Healthcare Co., Ltd. filed a constant-pressure variable-flow insufflator with integrated smoke removal module in EP (2023). Both represent recent Chinese outbound IP strategies targeting Western markets.
Data and insights on this page are based on a limited patent and literature dataset and are for reference only. Figures may not represent the complete technology landscape.