沼田光機製作所

Medical Devices Division

静脈弁カッター

Numata Optical Instruments Factory proactively uses the expertise we have accumulated in the manufacturing of optical device parts in the aim of providing technologies for different industries and fields.
With a focus on the development, manufacture, and sale of medical devices and medical instruments, we have been working on automotive, aerospace, and motorcycle parts; parts for the fields of communications, IT, and the environment; and precision parts for manufacturing and robotics.
In the medical devices market, the primary focus is on quality of life, so minimally invasive treatments and remote controlled treatments are spreading and there is a trend toward miniaturization of parts. Given this, we have been dedicating ourselves to original challenges through turning processing in the 3 mm to 200 mm diameter range, just as we have done in conventional optical precision processing in the medical field.

Our Efforts in the Development of Medical Devices/Instruments

沼田光機加工サンプル

We explore the needs of the medical field in order to apply our processing technologies so that we can go above and beyond in providing parts and materials for spectacle measurement devices and dental treatment devices. Starting with medical-engineering collaboration through direct liaison with clinicians, we are promoting our principal objective from a medical setting viewpoint.

2013: Began work on clinical setting research topics. Based on doctor interviews, began in-house research on improving suction tubes.
2014: Chosen by the Tokyo Metropolitan Industrial Technology Research Institute (a local incorporated administrative agency) for a medical field user evaluation project in its university-industry-public coordination business, and saw it through to the evaluation stage. Received mostly high evaluations for the user-centric level of integrity.
July 2015: Registered as a Manufacturer of Medical Devices (Registration Number: 13BZ200904).
Based on clinical research by vascular surgeon Dr. Takatoshi Furuya, jointly applied for a patent (together with Dr. Furuya) and began development of a venous valve cutter.
2017: Exhibited at the industry trade fair COMPAMED 2017 in Germany and presented on the developed venous valve cutter.
2018: Registered as a Manufacturer and Seller of Third-Class Medical Devices (Registration Number: 13B3X10250)
2018: Obtained patent rights
   Japan: 6372366; United States: 9,872,693 B2; Germany: 2015 101 418

Medical Device: Product Name “TF VenoCure” (Application Number 13B3X10250000001)

沼田光機加工サンプル

For use in PAD (peripheral artery disease) devices/arterial reconstruction using autologous veins

Challenges in medical settings
• Development of a device that suppresses damage to the inner wall and other areas of veins and can also work on venous valves

Characteristics of using live veins
• Facilitates post-surgery auto-immunity
• Can reduce the post-surgery dosage for the above reasons
• Can reduce the likelihood of repeat surgery due to intravascular coagulation, etc.

Custodian and Manager: Takako Numata
Overall Production and Sales Manager: Shigenori Tanaka
(concurrently serving as Quality Operations Manager and Safety Manager)
Medical Device Design/Development Consultant: Takatoshi Furuya, vascular surgeon (part-time consultant)

Dr. Takatoshi Furuya, clinician and researcher,
has focused primarily on innovations for safer surgery and higher quality of life.

March 1983: Graduated from the Graduate School of Medicine and Faculty of Medicine, The University of Tokyo.
Research at Secondary Department of Surgery, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo.
December 1986: Vascular Group, Secondary Department of Surgery, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo. Vascular Group, Secondary Department of Surgery, University of Yamanashi Hospital.
October 1992: After working at the Secondary Department of Surgery, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, worked as a surgeon at Asahi Hospital in Chiba. Worked in diagnostics in the vascular surgery department.
April 2001: Appointed chief of vascular surgery.
April 2012: Appointed auxiliary hospital director.

Main academic societies
Japan Surgical Society (medical specialist, medical advisor)
The Japanese Society for Cardiovascular Surgery (medical specialist, medical advisor, trustee, international member)
Japanese College of Angiology (vascular specialist, trustee)
Japanese Society for Vascular Surgery (trustee)

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