●Class I medical devices marketing authorization holder (Class 10,000 cleanroom possession)
●Near net shape level die casting technology (without draft angle)
●Ultra-precision machining of optical equipment parts
　Circularity 20μm, fitting dimension tolerance grade 6, sliding surface roughness Rmax2μm
●Processing of titanium alloys

Nara Seiko is developing high-level medical components, such as development of prosthetic implant materials and promoting OEM business of artificial joints and operational instruments.
Since it is entitled ISO13485 (international quality management systems for medical devices) and Class I medical devices marketing authorization holder, Nara Seiko is capable to provide integrated services of medical devices from designing, manufacturing to delivering. Additionally it is actively developing new products collaborating with medical institutions.

An optical equipment such as cameras, telescopes and projectors are precision equipment using refraction, reflection and interference of light, that requires advanced processing technologies.
Nara Seiko has a half century track record as an optical equipment manufacturer. Backed up by acquired engineering expertise, it manufactures optical devices at high quality and fitting to customer's demand.

①Ultrasonography inspection and marking
→Ultrasonography is useful to confirm any motion disorders of the tendon and thickened A1 pulley in real time

②Puncture the tendon sheath by a dissector
→The tip of the dissector is inserted under ultrasonographic guidance.

③Insert the sheath guide
→Use ultrasonography to confirm that the tip of the dissector is located between the tendon and the tendon sheath.

④The needle connection with the needle holder
→The needle can be held tightly and be more easily controlled by maneuvering it into the groove of the needle holder.

⑤Tendon sheath release

Procedure: Skin incision size Postsurgical dressing
Open surgery: 15-20mm up to 10 days
This procedure: 2mm (two portal) up to 3 days (no suture)

The new procedure has a number of advantages over current approaches to trigger finger problems.
1. The dressing on the wound was needed for only 3 days after surgery.
2. The patients experienced early recoveries in terms of being able to move easily through their activities of daily living.
3. There was only a minimal operative scar on the palm.
4. The cost of the surgery was low.
5. Disposable injection needles always provide sharp cuts.

Note: It must be mentioned that this procedure is NOT indicated for a snapping thumb.
This is because a digital nerve passes across the flexor tendon of the thumb.