Pneumatically deployed net system for endoscopic removal of foreign object

Since their early stages of development, micro-electro-mechanical systems (MEMS) have shown potential for breakthroughs in the fabrication of medical tools. The miniaturization of various devices using MEMS technology has enabled minimally invasive treatments and in situ measurements. In this paper, we introduce two advancements in MEMS applications in the medical field: (1) microneedle devices for brain activity evaluation, a transdermal drug delivery system, and biological fluid sampling; and (2) miniaturized MEMS sensors for monitoring the conditions inside blood vessels and respiratory organs. In addition, we provide a summary of MEMS sensors used in developing new drugs, detecting vital signs, and other applications.

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“…The actuation principle was also applied to button battery collection in the case of accidental ingestion. 56)…”

Section: Additional Applicationsmentioning

confidence: 99%

Advancements in MEMS technology for medical applications: microneedles and miniaturized sensors

Shikida

Hasegawa

Farisi

et al. 2021

Jpn. J. Appl. Phys.

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“…Such wide knuckles holding a group of parallel balloons ensure uniform bending of each knuckle and greatly increase the resistance to sideway stretching of the net when pulling the object during retrieval compared to the preliminary device introduced in [19]. The bending angle of each silicon block at a given air pressure is identical because all the balloons share the same pressure through a common line and bulge the same amount.…”

Section: B Netting Device Designmentioning

confidence: 99%

“…5, it was estimated that up to 4.5 -5.0 N of pulling force was applied during the real coin retrieval from esophagus. Based on the test result in [19], the thickness of the net in this paper was chosen to be roughly 10 µm to sustain the 5 N of force.…”

Section: B Netting Device Designmentioning

confidence: 99%

“…To achieve the goal, we have developed an active-bending net using micro electro-mechanical systems (MEMS) technology. Based on the object-removal plan and the proof-of-concept device introduced at a technical conference [19], an endoscope system has been professionally manufactured for this study to show how a MEMS device can be integrated in a conventional endoscope to enhance its performance. The custom-designed endoscope has an instrument channel to house the microfabricated netting device and two imaging systems.…”

Section: Introductionmentioning

confidence: 99%

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Miniature Netting System for Endoscopic Object Retrieval From Hard-to-Reach Area

Choi

Rubtsov

Kim

2013

J. Microelectromech. Syst.

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Abstract-Retrieval of an object from hard-to-reach areas requires the use of instruments of various kinds sent through an endoscope. However, removing a flat object firmly lodged in a narrow space, such as a coin or a button battery in a digestive passageway causes complications when using existing endoscopic instruments. To address such a difficult situation, this paper reports development of a miniature retrieval device using MEMS technology and implementation of the device in a custom-made endoscope. The MEMS device consists of a circular plastic net 15 mm in diameter and pneumatically operated micro-joints integrated under the net to bend it. The endoscope is equipped with a hooking mechanism, which secures the net after it wraps the object, and double imaging systems through which the operator monitors overall endoscopic retrieval procedures. Object retrieval is tested in a lab environment using a coin in a tube.

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“…As a result of the refinement of sensor manufacturing technology, these MEMS sensors are now being used in medical applications where reliability is of the utmost importance. In fact, microneedles for electroencephalogram measurement [1,2] and transdermal drug‐delivery systems [3], pressure sensors for intraocular pressure monitoring [4], stent sensors for vascular pressure monitoring [5], and manipulators for removal of foreign objects [6] have been developed. A blood‐flow‐measurement sensor using an ultrasonic element [7] and laser Doppler [8] has been developed as MEMS flow sensors.…”

Section: Introductionmentioning

confidence: 99%

Development ofMEMSFlow and Pressure Sensor Device for Detection of Extravasation at an Early Stage

Hasegawa

Shimohira

Matsushima

et al. 2022

IEEJ Transactions Elec Engng

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We developed a flow and pressure measurement device for detection of extravasation by intravenous injection of anticancer drugs at an early stage. Intravenous injection of a drug solution using a syringe pump enables a low-speed and highly accurate drugadministration rate. However, because the syringe pump forcibly delivers the drug solution, the drug solution is administrated at a constant administration rate regardless of the leakage of the drug solution to the outside of the blood vessel (extravasation) due to the indwelling needle coming out of the blood vessel. The proposed device is integrated into a flow-channel structure consisting of a PDMS layer in which a MEMS thermal-flow sensor formed on thin polyimide film and a pressure sensor are stacked on a plastic plate as a substrate. Therefore, it is possible to measure both the drug-administration rate and injection pressure. Early detection of extravasation can be achieved by identifying the state of needle-puncture based on changes in injection pressure. Then, the amount of leaked drug after leak occurs can be accurately measured with a flow sensor. We evaluated the flow and pressure detection function of the proposed device and confirmed that it is possible to detect extravasation early through an experiment involving a piece of raw chicken simulating human skin and flesh.

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Pneumatically deployed net system for endoscopic removal of foreign object

Cited by 7 publications

References 8 publications

Advancements in MEMS technology for medical applications: microneedles and miniaturized sensors

Advancements in MEMS technology for medical applications: microneedles and miniaturized sensors

Miniature Netting System for Endoscopic Object Retrieval From Hard-to-Reach Area

Development ofMEMSFlow and Pressure Sensor Device for Detection of Extravasation at an Early Stage

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