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Tweezer

German: Pinzette

1 Definition

The tweezer is one of the oldest aids and is some kind of enlongated index-finger with an accurate grip between two surfaces.

2 Composition

In general one distinguish the different parts of the tweezer: two big flanks which are connected in the end by a spring (imagination: >). These two flanks have two special surfaces, the tips at the far side of the spring and the surface for the hands to handle this aid. Both surfaces can be grooved which increases the halt. The tips at the far side can be shaped different (grooved, flat, blunt,..) depending on the application. The ends of the flanks are often individual designed to make it easier to distinguish between them eg a carbide insert (gilded spring)

3 Classification

In general one distinguishes the tweezers by application and their specific functional modification in four groups:

3.1 Anatomical tweezers

Butt, edentulous far sides, grooved inner sides, which do no harm to tissue, ie maximal tissue protection (in comparison to surgical tweezers), obligatory application in nerves, filaments, intestines and vessels because of their characteristics Partition:

  • Anatomical tweezer: with transversely grooved far sides
  • Adson tweezer: Flat surfaces for the hands and smooth transversely grooved far sides
  • Tweezer by Cushing: transversely grooved far sides, guide pin, spring part modified as scraper
  • Splint tweezer Feilchenfeld: compact anatomical tweezer, longitudinal channel at the far sides and concave surfaces for the hands.

3.2 Surgical tweezers

Teeth at the far sides, for tighting and certain catching of anatomical structures. Nomenclature of opposite teeth (One to two or two to three) interlocking or positioned angular to each other. Partition:

  • Surgical standard tweezer: One to two grooved transverse surface, but can be two to three as well
  • Surgical tweezer by Adson: One to one teeth
  • Surgical tweezer by Brown: lateral toothing, protection for slipping

3.3 Non-traumatic-gentle tweezers

Agreement of tight catch of surgical tweezer and cagey catch of anatomical ones; far sides with parallel interlocking or upright teeth, which prevent a slipping of the grabbed tissue even in low pressure; Vessel and intestine clips Partition:

  • By Bakey: especially for vascular surgery, most possible protection, far side with teeth
  • By Cooley: Hollows on top of each other

3.4 Tweezers with a special function

  • Tweezer for intestines by Duval: Far side is shaped like a triangle with teething, in the anterior part optimized transmission of energy without disadvantage of the surgical tweezer
  • Nose and ear tweezer: Shaped like a bayonet, curved tweezer with smooth, grooved or teethed far sided, are used to remove foreign particles, enable insight in narrow structures

4 Handling

The tweezer is used in the same way like a pencil. It is held between thumb and index finger and the middle finger supports it

Tags: , ,

Specialties: Anatomy

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