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definitions - Scalpel

scalpel (n.)

1.(medicine)a thin straight surgical knife used in dissection and surgery

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Merriam Webster

ScalpelScal"pel (skăl"pĕl), n. [L. scalpellum, dim. of scalprum a knife, akin to scalpere to cut, carve, scrape: cf. F. scalpel.] (Surg.) A small knife with a thin, keen blade, -- used by surgeons, and in dissecting.

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definition (more)

definition of Wikipedia

synonyms - Scalpel

scalpel (n.)

blade, cutter, edge, knife, steel

scalpel (n.) (medicine)

lancet

phrases

analogical dictionary

 

MESH root[Thème]

scalpel [MeSH]


scalpel (n.) [medicine]


Wikipedia

Scalpel

                   
Scalpel
Various scalpels.png
Various scalpels
Classification Cutting tool
Used with Stencil, Surgery
Related Lancet, utility knife, laser scalpel

A scalpel, or lancet, is a small and extremely sharp bladed instrument used for surgery, anatomical dissection, and various arts and crafts (called a hobby knife). Scalpels may be single-use disposable or re-usable. Re-usable scalpels can have attached, resharpenable blades or, more commonly, non-attached, replaceable blades. Disposable scalpels usually have a plastic handle with an extensible blade (like a utility knife) and are used once, then the entire instrument discarded. Scalpel blades are usually individually packed in sterile pouches but are also offered non-sterile. Double-edged scalpels are referred to as "lancets".

Scalpel blades are usually made of hardened and tempered steel, stainless steel, or high carbon steel; in addition, titanium, ceramic, diamond and even obsidian knives are not uncommon. For example, when performing surgery under MRI guidance, steel blades are unusable (the blades would be drawn to the magnets) or may cause image artifacts. Scalpel blades are also offered by select manufacturers with a Zirconium Nitride coated edge to improve sharpness and edge retention. Others manufacture blades that are polymer coated to enhance lubricity during a cut. Alternatives to scalpels in surgical applications include electrocautery and lasers.

Contents

  Surgical scalpels

Surgical scalpels consist of two parts, a blade and a handle. The handles are reusable, with the blades being replaceable. In medical applications, each blade is only used once (even if just for a single, small cut). Medical scalpel handles come in two basic types. The first is a flat handle used in the #3 and #4 handles. The #7 handle is more like a long writing pen, rounded at the front and flat at the back. A #4 handle is larger than a #3. Blades are manufactured with a corresponding fitment size so that they fit on only one size handle. The following table of blades is incomplete and some blades listed may work with handles not specified here. The handle is also known as b.p handle .

Types of surgical scalpel blades
Blade No. Compatible Handles Blade Description Uses
#10 1, 3, 7 Curved cutting edge with flat back For cutting skin and muscle in surgery, and for general carving and stencil making; also can be used for removal of 'edge beads' from photolithography resists.
#10a 3, 3L, 3 Graduated, 5B, 7, 9, B3, B3L This blade is a small and straight
#11 1, 3, 7 Triangular blade with sharp point, flat cutting edge parallel to the handle and flat back For precision cutting, stripping, sharp angle cuts and also stencil cutting due to its similarity to the X-Acto artknife blade
#12 3, 7 A small, pointed, crescent-shaped blade sharpened on the inside edge of the curve
#12d 3, 7 A small, pointed, crescent-shaped blade sharpened on both sides of the curve
#15 3, 7 A smaller version of the #10 For the same general uses as the #10 blade
#15a 3,7 A front-facing straight blade with flat back
#15c 3, 7 The #15 with a downward angle, flatter and thinner than the #15
#16 1, 3 A narrow chisel-like blade with flat, angled cutting edge, positioned higher than the axis of the handle For cutting stencils, scoring and etching
#17 1, 3 A flat face 1.6 mm chisel blade For narrow cuts
#18 2, 5, 6 A 12.7 mm chisel blade For deep cuts and scraping
#19 4 A similar blade to the #15
#22 2, 4, 5, 6 A larger version of the #10 For general use, shaping, whittling and trimming
#23 4, 4L, 4-Grad, 6B Similar to #22, leaf-shaped For long incisions.
#24 2, 4, 5, 6 A wide, flat, angled cutting edge For corner cuts, trimming, stripping, and cutting mats and gaskets
#25 4 A front-facing straight blade with flat back (similar to #15a)
#25a 4 A triangular straight blade with flat back edge taking a downwards angle (similar to #10a, shorter than #26)
#26 4 A triangular straight blade with flat back edge taking a downwards angle (similar to the #15a, longer than #25a)
#34 4 A triangular blade similar to the #11
#36 4 A larger blade Used in general surgery but also within a Laboratory setting for Histology and Histopathology
#60 4 A long blade resembling the #10 with a long cutting edge, rounded tip and flat back.


  Gripping a medical scalpel

  Palmar grip

Also called the "dinner knife" grip. The handle is held with the second through fourth fingers and secured along the base of the thumb, with the index finger extended along the top rear of the blade and the thumb along the side of the handle. This grip is best for initial incisions and larger cuts.

  Pencil grip

Best used for more precise cuts with smaller blades (e.g. #15) and the #7 handle. The scalpel is held with the tips of the first and second fingers and the tip of the thumb with the handle resting on the fleshy base of the index finger and thumb. Care should be taken not to allow the handle to rest too far along the index finger as this promotes an unstable grip and cramped fingers.

  Graphic design and arts and crafts blades

  X-Acto knife

Graphical and model-making scalpels tend to have round handles, with textured grips (either knurled metal or soft plastic). These are often called by the name of the most well-known manufacturer of graphic arts blades, X-Acto knives. The blade is usually flat and straight, allowing it to be run easily against a straightedge to produce straight cuts.

There are many kinds of graphic arts blades; the most common around the graphic design studio is the #11 blade which is very similar to a #11 surgical blade (q.v.). Other blade shapes are used for wood carving, cutting leather and heavy fabric, etc.

  Ancient scalpels

  Scalpel injuries

In the last decade[when?], a rising awareness of the dangers of sharps in a medical environment has led to the development of various methods of protecting healthcare workers from accidental cuts and puncture wounds. According to the Centers for Disease Control and Prevention, as many as 1,000 people each day are subject to accidental needle sticks and lacerations while providing medical care. Scalpel blade injuries are among the most frequent sharps injuries, second only to needlesticks. Scalpel injuries make up 7 percent to 8 percent of all sharps injuries.[2][3]

"Scalpel Safety" is a term coined to inform users that there are choices available to them to ensure their protection from this common sharps injury.[4]

  Safety scalpels

Safety scalpels are becoming increasingly popular as their prices come down and also on account of legislation such as the Needle Stick Prevention Act. There are essentially two kinds of disposable safety scalpels offered by various manufacturers. They can be either classified as retractable blade or retractable sheath type. The retractable blade version made by companies such as OX Med Tech, DeRoyal, Jai Surgicals, Swann Morton are more intuitive to use due to their similarities to a standard box-cutter. Retractable sheath versions have much stronger ergonomic feel for the doctors and are made by companies such as Aditya Dispomed, Aspen Surgical and Southmedic. Few companies have also started to offer a safety scalpel with a reusable metal handle. In such models, the blade is usually protected in a cartridge. Such systems usually require a custom handle and the price of blades and cartridges is considerably more than for conventional surgical blades.

However, CDC studies shows that up to 87% of active medical devices are not activated. Safety scalpels are active devices and therefore the risk of not activating is still significant.[5] There is a study that indicated there were actually four times more injuries with safety scalpels than reusable scalpels.[6]

  Blade removers

There are various scalpel blade removers on the market that allows users to safely remove blades from the handle, instead of dangerously using fingers or forceps. In the medical field, when taking into account activation rates, the combination of a single-handed scalpel blade remover with a passing tray or a neutral zone was as safe and up to five times safer than a safety scalpel.[7] Companies like Qlicksmart offers a single-handed scalpel blade remover that complies with regulatory requirements such as US OSHA Standards.[8]

  Safety

The usage of both safety scalpels and a single-handed blade remover combined with a hands-free passing technique are potentially effective in reducing scalpel blade injuries.[7] It is up to employers and scalpel users to consider and use safer and more effective scalpel safety measures when feasible.

  See also

  References

  1. ^ "Roman ruins cast new light on a trip to doctor". Telegraph.co.uk. December 9, 2007.
  2. ^ Perry J, Parker G, Jagger J. EPINet Report: 2001 Percutaneous Injury Rates. Advances in Exposure Prevention 2003; 6(3): 32-36.
  3. ^ "CDC (Centre for Disease Control and Prevention) Sharps Injury Prevention Workbook." from http://www.cdc.gov/SharpsSafety/workbook.html
  4. ^ Sinnott, M. and Wall, D. (2007) "’SCALPEL SAFETY’: How safe (or dangerous) are safety scalpels?" International Journal of Surgery 6(2):176-177, doi:10.1016/j.ijsu.2007.01.010
  5. ^ Alvarado-Ramy F, Beltrami EM, Short LJ et al. "A comprehensive approach to percutaneous injury prevention during phlebotomy: results of a multicentre study, 1993-1995." Infect Control Hosp Epidemiol 2003; 24(2): 97-104.
  6. ^ Needlestick and Sharp-Object Injury Report. US EPINet Network, 2003 Advances in Exposure Prevention 2005;7(4):44-45.
  7. ^ a b Fuentes, H., et al. (2008). ""Scalpel Safety": Modeling the effectiveness of different safety devices’ ability to reduce scalpel blade injuries." The International Journal of Risk & Safety in Medicine 20(1-2):83-89.
  8. ^ OSHA Standard Interpretations 12/22/2005 - Use of passing trays and single-handed scalpel blade remover in a surgical setting. http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=INTERPRETATIONS&p_id=25339

  External links

   
               

 

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