Forceps (plural forceps
or considered a plural noun without a singular, often a pair of forceps;
the Latin plural ''forcipes'' is no longer recorded in most dictionaries)
[ are a handheld, hinged instrument used for grasping and holding objects. Forceps are used when fingers are too large to grasp small objects or when many objects needed to be held at one time while the hands are used to perform a task. The term "forceps" is used almost exclusively in the fields of biology and medicine. Outside biology and medicine, people usually refer to forceps as ]tweezers
Tweezers are small hand tools used for grasping objects too small to be easily handled with the human fingers. Tweezers are thumb-driven forceps most likely derived from tongs used to grab or hold hot objects since the dawn of recorded history. ...
, tongs
Tongs are a type of tool used to grip and lift objects instead of holding them directly with hands. There are many forms of tongs adapted to their specific use.
The first pair of tongs belongs to the Egyptians. Tongs likely started off as ...
, pliers
Pliers are a hand tool used to hold objects firmly, possibly developed from tongs used to handle hot metal in Bronze Age Europe. They are also useful for bending and physically compressing a wide range of materials. Generally, pliers consist ...
, clips or clamps
Clamp may refer to:
Tools and devices
*Brick clamp, an early method of baking bricks
*Clamp (tool), a device or tool used to hold objects in a fixed relative position (many types listed)
** C-clamp
** C-clamp (stagecraft)
**Riser clamp, a device ...
.
Mechanically, forceps employ the principle of the lever
A lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or ''fulcrum''. A lever is a rigid body capable of rotating on a point on itself. On the basis of the locations of fulcrum, load and effort, the lever is div ...
to grasp and apply pressure.
Depending on their function, basic surgical forceps can be categorized into the following groups:
# Non-disposable forceps. They should withstand various kinds of physical and chemical effects of body fluids, secretions, cleaning agents, and sterilization methods.
# Disposable forceps. They are usually made of lower-quality materials or plastics which are disposed after use.
Surgical
Surgery ''cheirourgikē'' (composed of χείρ, "hand", and ἔργον, "work"), via la, chirurgiae, meaning "hand work". is a medical specialty that uses operative manual and instrumental techniques on a person to investigate or treat a pat ...
forceps are commonly made of high-grade carbon steel
Carbon steel is a steel with carbon content from about 0.05 up to 2.1 percent by weight. The definition of carbon steel from the American Iron and Steel Institute (AISI) states:
* no minimum content is specified or required for chromium, cobalt ...
, which ensures they can withstand repeated sterilization in high-temperature autoclave
An autoclave is a machine used to carry out industrial and scientific processes requiring elevated temperature and pressure in relation to ambient pressure and/or temperature. Autoclaves are used before surgical procedures to perform sterilizati ...
s. Some are made of other high-quality stainless steel
Stainless steel is an alloy of iron that is resistant to rusting and corrosion. It contains at least 11% chromium and may contain elements such as carbon, other nonmetals and metals to obtain other desired properties. Stainless steel's corros ...
, chromium
Chromium is a chemical element with the symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, lustrous, hard, and brittle transition metal.
Chromium metal is valued for its high corrosion resistance and hardne ...
and vanadium
Vanadium is a chemical element with the symbol V and atomic number 23. It is a hard, silvery-grey, malleable transition metal. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer ( pas ...
alloys to ensure durability of edges and freedom from rust. Lower-quality steel is used in forceps made for other uses. Some disposable
A disposable (also called disposable product) is a product designed for a single use after which it is recycled or is disposed as solid waste. The term is also sometimes used for products that may last several months (e.g. disposable air filte ...
forceps are made of plastic
Plastics are a wide range of synthetic or semi-synthetic materials that use polymers as a main ingredient. Their plasticity makes it possible for plastics to be moulded, extruded or pressed into solid objects of various shapes. This adaptab ...
. The invention of surgical forceps is attributed to Stephen Hales
Stephen Hales (17 September 16774 January 1761) was an English clergyman who made major contributions to a range of scientific fields including botany, pneumatic chemistry and physiology. He was the first person to measure blood pressure. He al ...
.[Scientific American inventions and discoveries By Rodney P. Carlisle.]
There are two basic types of forceps: non-locking (often called "thumb forceps" or "pick-ups") and locking, though these two types come in dozens of specialized forms for various uses. Non-locking forceps also come in two basic forms: hinged at one end, away from the grasping end (colloquially such forceps are called tweezers) and hinged in the middle, rather like scissors
Scissors are hand-operated shearing tools. A pair of scissors consists of a pair of metal blades pivoted so that the sharpened edges slide against each other when the handles (bows) opposite to the pivot are closed. Scissors are used for cutti ...
. Locking forceps are almost always hinged in the middle, though some forms place the hinge very close to the grasping end. Locking forceps use various means to lock the grasping surfaces in a closed position to facilitate manipulation or to independently clamp, grasp or hold an object.
Thumb forceps
Thumb forceps, known simply as ''forceps'' in surgical specialties, are commonly held in a pen grip between the thumb
The thumb is the first digit of the hand, next to the index finger. When a person is standing in the medical anatomical position (where the palm is facing to the front), the thumb is the outermost digit. The Medical Latin English noun for thumb ...
and index finger
The index finger (also referred to as forefinger, first finger, second finger, pointer finger, trigger finger, digitus secundus, digitus II, and many other terms) is the second digit of a human hand. It is located between the thumb and the mid ...
(sometimes also the middle finger
The middle finger, long finger, second finger, third finger, toll finger or tall man is the third digit of the human hand, located between the index finger and the ring finger. It is typically the longest digit. In anatomy, it is also calle ...
), with the top end resting on the first dorsal interosseous muscle at the webspace between the thumb and index finger. Spring tension at the top end holds the grasping ends apart until pressure is applied. This provides an extended pinch and allows the user to easily grasp, manipulate and quickly release small objects or delicate tissue with readily variable pressure. Thumb forceps are used to hold tissue still when applying sutures, to gently move tissues out of the way during exploratory surgery and to access confined cavities that are hard to reach with hands and fingers.
Thumb forceps can have smooth tips, cross-hatched tips or serrated tips (often called "mouse's teeth"). Common arrangements of teeth are 1×2 (two teeth on one side meshing with a single tooth on the other), 7×7 and 9×9. Serrated forceps are used on tissue; counter-intuitively, teeth will damage tissue less than a smooth surface because one can grasp with less overall pressure. Smooth or cross-hatched forceps are used to move dressings, remove sutures and similar tasks.
Locking forceps
Locking forceps, sometimes called ''clamps'', are used to grasp and firmly hold objects or body tissue
In biology, tissue is a biological organizational level between cells and a complete organ. A tissue is an ensemble of similar cells and their extracellular matrix from the same origin that together carry out a specific function. Organs are ...
s, or to apply external compression onto tubular structures such as blood vessel
The blood vessels are the components of the circulatory system that transport blood throughout the human body. These vessels transport blood cells, nutrients, and oxygen to the tissues of the body. They also take waste and carbon dioxide away ...
s or guts
The gastrointestinal tract (GI tract, digestive tract, alimentary canal) is the tract or passageway of the digestive system that leads from the mouth to the anus. The GI tract contains all the major organs of the digestive system, in humans and ...
. When they are specifically used to occlude an artery
An artery (plural arteries) () is a blood vessel in humans and most animals that takes blood away from the heart to one or more parts of the body (tissues, lungs, brain etc.). Most arteries carry oxygenated blood; the two exceptions are the pul ...
to forestall bleeding, they are called hemostat
A hemostat (also called a hemostatic clamp, arterial forceps, or pean after Jules-Émile Péan) is a surgical tool used in many surgical procedures to control bleeding. For this reason, it is common in the initial phases of surgery for the initia ...
s. Another form of locking forceps is the needle holder
A needle holder, also called needle driver or needle forceps, is a surgical instrument similar to a hemostat, used by doctors and surgeons to hold and push a suturing needle when performing wound closure, ligation and other surgical procedure ...
, used to guide a suturing needle through tissue. Many locking forceps use finger rings/loops to facilitate handling (see illustration, below, of Kelly forceps). The finger loops are usually grasped by the thumb and middle or ring finger
The ring finger, third finger, fourth finger, leech finger, or annulary is the fourth digit of the human hand, located between the middle finger and the little finger.
Sometimes the term ring finger only refers to the fourth digit of a left-han ...
s, while the index finger helps stabilize and guide the instrument.
The most common locking mechanism is a handle ratchet
Ratchet may refer to:
Devices
* Ratchet (device), a mechanical device that allows movement in only one direction
* Ratchet, metonomic name for a socket wrench incorporating a ratcheting device
* Ratchet (instrument), a music instrument and a ...
, which consists of an asymmetrically serrated short protrusion near the finger loop of one of the handles, and a corresponding hook on the other. As the forceps are closed, the opposing teeth engage and interlock, keeping the handles adducted and the jaw surfaces clamped constantly. To unlock, a simple shearing push by the fingers is all that is needed to disengage the teeth and allow the grasping ends to move apart.
Kelly forceps
Kelly forceps are a type of hemostat
A hemostat (also called a hemostatic clamp, arterial forceps, or pean after Jules-Émile Péan) is a surgical tool used in many surgical procedures to control bleeding. For this reason, it is common in the initial phases of surgery for the initia ...
usually made of stainless steel. They resemble a pair of scissor
Scissors are hand-operated shearing tools. A pair of scissors consists of a pair of metal blades pivoted so that the sharpened edges slide against each other when the handles (bows) opposite to the pivot are closed. Scissors are used for cutti ...
s with the blade replaced by a blunted grip. They also feature a locking mechanism to allow them to act as clamps.
Kelly forceps may be floor-grade (regular use) and as such not used for surgery
Surgery ''cheirourgikē'' (composed of χείρ, "hand", and ἔργον, "work"), via la, chirurgiae, meaning "hand work". is a medical specialty that uses operative manual and instrumental techniques on a person to investigate or treat a pat ...
. They may also be sterilized and used in operations, in both human and veterinary
Veterinary medicine is the branch of medicine that deals with the prevention, management, diagnosis, and treatment of disease, disorder, and injury in animals. Along with this, it deals with animal rearing, husbandry, breeding, research on nutri ...
medicine. They may be either curved or straight. In surgery, they may be used for occluding blood vessel
The blood vessels are the components of the circulatory system that transport blood throughout the human body. These vessels transport blood cells, nutrients, and oxygen to the tissues of the body. They also take waste and carbon dioxide away ...
s, manipulating tissues, or for assorted other purposes.
They are named for Howard Atwood Kelly
Howard Atwood Kelly (February 20, 1858 – January 12, 1943) was an American gynecologist. He obtained his B.A. degree and M.D. degree from the University of Pennsylvania. He, William Osler, William Halsted, and William Welch together are know ...
, M.D., first professor of obstetrics and gynecology at the Johns Hopkins School of Medicine
The Johns Hopkins University School of Medicine (JHUSOM) is the medical school of Johns Hopkins University, a private research university in Baltimore, Maryland. Founded in 1893, the School of Medicine shares a campus with the Johns Hopkins Hospi ...
.
The "mosquito" variant of the tool is more delicate and has smaller, finer tips. Other varieties with similar, if more specialized, uses are Allis clamps, Babcocks, Kochers, Carmalts, and tonsils; all but the last bear the names of the surgeons who designed them.
Other medical forceps
Other types of forceps include:
* Alligator forceps
*Anesthesia forceps, often with smooth jaw surface for clamping tubes
Tube or tubes may refer to:
* ''Tube'' (2003 film), a 2003 Korean film
* ''The Tube'' (TV series), a music related TV series by Channel 4 in the United Kingdom
* "Tubes" (Peter Dale), performer on the Soccer AM television show
* Tube (band), a ...
such as a double-lumen tube
*Artery forceps, also known as a hemostat
A hemostat (also called a hemostatic clamp, arterial forceps, or pean after Jules-Émile Péan) is a surgical tool used in many surgical procedures to control bleeding. For this reason, it is common in the initial phases of surgery for the initia ...
*Atraumatic forceps, Debaker forceps
*Biopsy forceps
*Bone-cutting forceps
*Bone-reduction forceps
*Bone-holding forceps
* Bulldog forceps
*Catheter forceps
*Cilia forceps
*Curettes forceps
*Debaker forceps
*Dermal forceps & nippers
*Dressing forceps
*Ear forceps
*Eye forceps
*Gallbladder forceps
*Gerald forceps
*Harvey forceps
*Hemostatic forceps
An antihemorrhagic (antihæmorrhagic) agent is a substance that promotes hemostasis (stops bleeding). It may also be known as a hemostatic (also spelled haemostatic) agent.
Antihemorrhagic agents used in medicine have various mechanisms of action: ...
*Hysterectomy forceps
*Intestinal forceps
*Magill forceps
Magill forceps are angled forceps used to guide a tracheal tube into the larynx or a nasogastric tube into the esophagus under direct vision.[Needle holder
A needle holder, also called needle driver or needle forceps, is a surgical instrument similar to a hemostat, used by doctors and surgeons to hold and push a suturing needle when performing wound closure, ligation and other surgical procedure ...]
*Obstetrical forceps
Obstetrical forceps are a medical instrument used in childbirth. Their use can serve as an alternative to the ventouse (vacuum extraction) method.
Medical uses
Forceps births, like all assisted births, should only be undertaken to help pr ...
*Postmortem forceps
*Splinter forceps
*Sponge forceps
*Spreading forceps
*Sterilizer forceps
*Suture sundries forceps
*Tenaculum
A tenaculum is a surgical instrument, usually classified as a type of forceps. It consists of a slender sharp-pointed hook attached to a handle and is used mainly in surgery for seizing and holding parts, such as blood vessels.Merriam-Webster Onl ...
forceps
*Thoracic forceps
*Thoracic surgical forceps
*Thumb forceps'
*Tissue forceps
*Tongue forceps
*Tooth extracting forceps
*Tubing forceps
*Uterine forceps
*Vulsellum forceps - used to grasp cervical
In anatomy, cervical is an adjective that has two meanings:
# of or pertaining to any neck.
# of or pertaining to the female cervix: i.e., the ''neck'' of the uterus.
*Commonly used medical phrases involving the neck are
**cervical collar
**cerv ...
lips to visualize the cervix.
References
{{Surgical instruments
Medical clamps