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Forceps

Forceps are a class of handheld surgical instruments designed to grasp, manipulate, hold, or compress tissues, blood vessels, or other materials during medical procedures, functioning similarly to tweezers or pliers but adapted for precision in sterile environments; the term derives from Latin forceps, meaning "pair of tongs," from formus (hot) + capere (to take), originally referring to tools for grasping hot objects. They typically feature two elongated arms or blades joined at a fulcrum, often with finger rings or thumb rests for control, and may include a ratcheted lock mechanism to maintain grip without continuous pressure. Classified as manual surgical instruments for general use under FDA regulations, forceps are essential in a wide range of specialties, including general surgery, gynecology, obstetrics, and dentistry, where they enable atraumatic handling to minimize tissue damage. The origins of forceps trace back to ancient civilizations, with archaeological evidence from revealing examples dating to the 1st century CE, such as bone forceps (ostagra) used to extract skull fragments after fractures or during fetal impactions. These early instruments, preserved in sites like the , were crafted from and employed for tasks including bone levering, hair epilation, and uvula crushing to control hemorrhage before , as described by physicians like Soranus and Aetius. Over centuries, forceps evolved through the and , with refinements in design for better and , though major innovations remained limited until the industrial era's advancements in and sterilization techniques enhanced their safety and efficacy. Surgical forceps are broadly classified into non-locking (thumb) forceps for delicate manipulation and locking (ringed or hemostatic) forceps for securing vessels or larger structures, with further subtypes tailored to specific applications. Thumb forceps, resembling , include varieties like Adson forceps with fine teeth for gripping or without slippage, while hemostatic clamps such as or forceps feature serrated and ratchets to occlude blood flow and prevent hemorrhage. Specialized forms encompass , like Simpson or Kielland models with curved blades for assisting vaginal deliveries by rotating or extracting the fetal head, and Duval forceps with broad, non-traumatic tips for handling delicate organs such as the or lungs. In modern practice, ergonomic enhancements, including rounded handles and double-action , reduce surgeon fatigue during prolonged operations, particularly in fields like head and neck surgery. Despite their versatility, improper use can lead to , underscoring the need for training and adherence to protocols like those outlined in operative guidelines.

Overview and Design

Definition and Etymology

Forceps are a handheld, hinged designed for grasping, holding firmly, or exerting traction on objects, especially in delicate operations such as those performed by surgeons or jewelers. In medical contexts, they serve as pincer-like tools to manipulate tissues or small items without direct hand contact, enabling precision during procedures. The term "forceps" derives from the Latin forceps, denoting a pair of , from formus (hot) and capere (to seize). This reflects its original reference to blacksmith used for handling hot metal in forges. The word entered English in the early 17th century, with the earliest recorded use in 1634 in a . Generally, forceps feature two blades or arms connected at a central pivot, allowing the user to open and close the tips via handles for controlled gripping. This configuration provides mechanical leverage, permitting fine adjustments in pressure suitable for precise tasks.

Basic Components and Mechanisms

Forceps consist of four primary components: the blades, shanks, pivot or joint, and handles. The blades, also known as the tips or jaws, are the distal ends designed for grasping and holding tissues or objects, featuring variations such as serrated edges, fine teeth, or smooth surfaces to suit different applications. The shanks form the elongated arms that extend from the blades to the pivot, providing leverage and reach while allowing the instrument to access surgical sites. The pivot, often a box joint or simple hinge, connects the shanks and enables the scissor-like opening and closing motion essential for manipulation. Handles at the proximal end, typically equipped with finger rings or serrated grips, facilitate control by the surgeon's thumb and fingers. The functional mechanisms of forceps rely on these components to achieve precise control. In non-locking designs, the pivot allows free scissor-like action, where pressure on the handles brings the blades together via lever principles, amplifying grip force without fixation. Locking forceps incorporate a ratchet mechanism near the pivot, enabling the blades to be secured at various positions to maintain consistent pressure on tissues during procedures. Some thumb forceps use a spring-loaded joint for automatic retraction, reducing hand fatigue by keeping the blades open until compressed. Materials for forceps prioritize durability, sterility, and biocompatibility. Most surgical forceps are constructed from high-grade , which resists corrosion and withstands repeated sterilization at high temperatures. Alternatives include for lighter weight and enhanced corrosion resistance, or disposable variants for single-use scenarios to minimize risks. Ergonomic features enhance and . Blades often include serrations or teeth to prevent slippage on tissues, while smooth tips reduce to delicate structures; handles feature textured grips or ring sizes calibrated for hand dimensions to improve precision and minimize strain during prolonged use.

History

Early Origins and Invention

The earliest precursors to forceps emerged in ancient civilizations as simple tong-like tools for practical purposes, gradually adapting to medical uses. In , bronze utilized in metalwork date to approximately 3000 BCE, representing rudimentary grasping instruments that paralleled later surgical applications. By the era, more specialized surgical were in use, as described by the physician in the 1st century AD; in his work De Medicina, Celsus detailed their application in procedures such as seizing and excising tumors near the skin. artifacts, including bone forceps for extracting skull fragments or loose teeth and forceps for crushing tissue to control bleeding, further illustrate this transition from general tools to precise medical instruments, with examples preserved from sites like following the eruption of in 79 CE. The pivotal invention of modern forceps occurred in the 17th and 18th centuries, marking their establishment as dedicated medical devices. , designed to assist in difficult by grasping the fetal head, were secretly developed around 1620 by Peter Chamberlen the Elder, a French-born English barber-, in . These instruments represented a significant advancement over prior manual techniques, enabling safer extraction during prolonged labors. Meanwhile, in the early , English clergyman and physiologist invented surgical forceps in the late specifically for urological procedures, such as removing kidney and stones from the to alleviate the painful "distemper of the stone"; his design, tested collaboratively with surgeon John Ranby, was detailed in his 1733 publication Haemastaticks. The Chamberlen family's remained a closely guarded secret for over a century, allowing them to maintain a lucrative by attending high-risk deliveries, often charging exorbitant fees to and charging attendants to patients during use. This exclusivity persisted across three generations of Chamberlens—from Peter the Elder (1560–1631) through his descendants—until the design was publicly disclosed in 1733 by English man-midwife Chapman in his An Essay Towards the Improvement of Midwifery, which included engravings and instructions for replication. Chapman's revelation democratized the tool, spurring wider adoption in obstetric practice despite ongoing debates over its risks. Early forceps were typically crafted from forged iron or rudimentary , materials chosen for their availability and workability in forges. However, these alloys suffered significant limitations, including susceptibility to from exposure to bodily fluids and moisture, as well as leading to frequent breakage under stress during procedures. Such constraints necessitated careful handling and limited the instruments' durability, prompting gradual refinements in as adoption grew.

Evolution in the 19th and 20th Centuries

In the , the evolution of forceps was driven by advancements in and , with a focus on improving safety and efficacy during deliveries and procedures. Scottish obstetrician introduced his curved on May 10, 1848, at the Edinburgh Obstetrical Society, featuring curved blades, parallel shanks to prevent pelvic outlet injury, and longer, larger blades to securely embrace the . This design allowed for asymmetric application in cases of contraction, significantly reducing maternal and fetal compared to earlier straight models and facilitating safer vaginal deliveries. The industrialization of the era further enabled of such instruments through improved and techniques, making specialized forceps more accessible to practitioners beyond elite medical circles. By the early 20th century, forceps designs specialized further for and tissue handling, exemplified by the hemostatic forceps invented by American surgeon Howard A. Kelly in the 1890s. These curved, ratcheted clamps, resembling blunt scissors without sharp teeth, were optimized for gripping and clamping larger blood vessels during surgery, minimizing slippage and vessel damage. The , founded in 1913, played a pivotal role in efforts, establishing committees during to coordinate the production and specification of surgical supplies, including forceps, to ensure uniformity in quality and design across hospitals. This initiative addressed wartime shortages and promoted consistent instrument performance, influencing widespread adoption in surgical practice. Mid-20th-century innovations emphasized atraumatic features and material durability, reflecting post- technological refinements. In the 1940s, cardiovascular surgeon Michael E. DeBakey developed atraumatic forceps with a long, slender profile, nonserrated surfaces, and fine serrations to distribute pressure evenly, allowing gentle manipulation of delicate tissues and blood vessels without crushing or tearing. These were particularly impactful in vascular and cardiac procedures, reducing complications like and while improving precision and recovery outcomes. Concurrently, the shift to construction, increasingly adopted after for its corrosion resistance and ease of sterilization, enhanced instrument longevity and hygiene in operating rooms. Toward the late , while general surgical forceps proliferated through and , obstetrical use declined markedly due to the rise of alternative interventions. Cesarean section rates surged—from 4.4% in 1960 to nearly 28% by 2010 in some institutions—offering a perceived safer option for complicated labors, thereby reducing reliance on forceps deliveries. The introduction and growing preference for further supplanted forceps, with its use increasing from about 2% in 1990 to 12% by 2000 in monitored cohorts, alongside diminished training opportunities and concerns over litigation. Epidural analgesia, while sometimes prolonging labor and necessitating intervention, contributed indirectly to this shift by aligning with trends favoring cesarean over instrumental vaginal birth.

Classification and Types

Non-Locking Forceps

Non-locking forceps, also referred to as thumb forceps, are surgical instruments characterized by the absence of a or locking mechanism, allowing for temporary grasping through direct manual pressure applied by the thumb and index finger in a pencil-like . Their design typically follows a tweezers-style or scissor-like configuration with spring-loaded action to facilitate opening, and the tips vary to suit delicate tasks: smooth or serrated surfaces for minimal , or fine toothed patterns such as 1x2 interlocking teeth in Adson forceps for secure handling. These features enable precise manipulation without committing to a fixed hold, distinguishing them from self-retaining alternatives. Common subtypes include tissue forceps for direct skin and soft tissue engagement, such as (4-3/4 inches long with fine 1x2 teeth) and (available in 4-3/4 to 6 inches, featuring multiple rows of 7x7 or finer interlocking teeth for enhanced grip on fragile structures). Dressing forceps, often smooth-tipped and ranging from 3 to 5 inches, are specialized for wound care, such as applying or removing dressings and probing minor injuries without damaging surrounding tissue. Overall, these instruments span sizes of 3 to 6 inches to balance maneuverability and reach in confined surgical fields. Non-locking forceps excel in applications demanding high precision and rapid release, such as microsurgery for vessel or procedures involving corneal handling, where their atraumatic tips minimize injury to sensitive structures. This design supports quick adjustments and reduces the risk of unintended compression, promoting efficiency in fine procedural work. However, their reliance on continuous finger pressure limits use to short-duration tasks, as sustained gripping can cause operator fatigue and is ineffective for heavier clamping needs.

Locking Forceps

Locking forceps, commonly referred to as hemostats, are surgical instruments equipped with a mechanism on their handles that enables secure, hands-free clamping of tissues or . This locking feature allows surgeons to apply and maintain adjustable pressure without ongoing manual effort, distinguishing them from non-locking variants. The design includes a box lock where the shanks—either straight or curved—meet, with tips featuring serrations or s optimized for and grasp. The ratchet mechanism typically comprises multiple interlocking teeth, often three to five, which engage to provide graduated locking tension for precise control. Common subtypes include Kelly forceps, which have straight shanks and half-serrated jaws suited for hemostasis on larger blood vessels; mosquito forceps, smaller and more delicate for clamping fine structures like small arteries; and Kocher forceps, characterized by toothed jaws (such as 1x2 configuration) and full horizontal serrations for securely holding tough, fibrous tissues. These evolved from 19th-century hemostats pioneered by surgeons like Jules-Émile Péan. A primary advantage of locking forceps is their ability to sustain a firm independently, freeing the surgeon's hands for other tasks and proving essential in managing hemorrhage or repositioning organs. Standard hemostats range from 6 to 8 inches in length to accommodate various procedural needs, while needle holders represent adapted locking designs with reinforced specifically for gripping suture needles during .

Obstetrical Forceps

Obstetrical forceps are specialized instruments designed for assisted , featuring extended shanks typically measuring 12 to 14 inches to allow access to the within the birth canal. These forceps incorporate a pelvic curve to align with the maternal and facilitate proper positioning, along with a cephalic curve that conforms to the for gentle molding and grip. The locking mechanism, positioned below the handles, enables secure interlocking of the blades while permitting controlled traction and, in some designs, . Classifications of obstetrical forceps are based on their specific curves and intended applications. Simpson forceps feature an elongated cephalic curve with parallel shanks and fenestrated blades, making them suitable for grasping a molded during straightforward traction. Kielland forceps, by contrast, have a minimal pelvic curve and a sliding lock, allowing for rotation of the to correct malposition, such as occiput posterior. Piper forceps are distinguished by their longer shanks and pronounced pelvic curve, designed specifically for delivering the after-coming head in breech presentations. Indications for using include prolonged second-stage labor—defined as exceeding 3 hours with epidural or 2 hours without in multiparous women, and 4 hours with or 3 hours without in nulliparous women—as well as fetal distress evidenced by non-reassuring fetal tracings when the is below the ischial spines. Maternal exhaustion in the second stage may also prompt their use. These instruments are typically constructed from , with blade designs such as fenestrated or smooth surfaces to minimize tissue trauma to both mother and . The utilization of has declined markedly over recent decades, from approximately 12-18% of vaginal deliveries in the 1970s to about 0.5% of vaginal births as of 2023 in the , largely due to the rise of alternative methods like , increased cesarean section rates, reduced training opportunities, and litigation concerns. This shift reflects advancements in training, litigation concerns, and preferences for less invasive options.

Applications

Surgical and Procedural Uses

Forceps play a pivotal role in and minor procedures for grasping and dissecting tissues, enabling surgeons to manipulate structures with precision while minimizing trauma. Tissue forceps, typically featuring fine teeth or serrations, are commonly employed to retract edges and stabilize soft tissues during incisions, ensuring clear visualization of the operative field. DeBakey forceps, with their atraumatic, tapered jaws, are specifically designed for vascular handling, allowing gentle grasping of delicate blood vessels without damaging the endothelial lining, which is crucial in procedures involving arteries and veins. Achieving is another fundamental application, where forceps temporarily occlude bleeding vessels to facilitate or electrocautery. Kelly forceps, characterized by their straight or curved and box-lock , are used to larger bleeders in abdominal or thoracic surgeries, providing secure until permanent is established. Mosquito forceps, smaller and more delicate, target fine vessels in areas requiring meticulous , such as during of superficial tissues, to prevent excessive blood loss without compromising adjacent structures. In suturing and wound exploration, specialized forceps enhance procedural efficiency and safety. Needle holders, a locking variant of forceps with carbide inserts for grip, are indispensable for manipulating curved needles during tissue closure, allowing surgeons to drive sutures through layers with controlled force and reduced slippage. Sponge forceps, often ringed or serrated, facilitate the packing of gauze into cavities or wounds to absorb fluids, tamponade minor bleeding, or protect surrounding tissues during deeper exploration. Non-locking forceps variants are preferred here for their precision in handling without unintended tissue crush. Specific surgical contexts highlight the versatility of forceps in non-obstetric applications. In , such as appendectomies, grasping forceps secure the mesoappendix and base for safe transection and removal, often in laparoscopic settings using needle-type variants for enhanced maneuverability. Orthopedic procedures utilize bone-holding forceps to stabilize fragments or osteotomies, maintaining alignment during plating or wiring to promote proper healing. In ear, nose, and throat () interventions, forceps with angled or cupped jaws grasp pharyngeal or tonsillar tissues, aiding in excision and during procedures like .

Obstetric and Gynecological Uses

In , forceps are primarily employed for assisted to facilitate the birth of the when labor has progressed but additional intervention is required to expedite or mitigate maternal or fetal distress. The involves the careful application of the forceps blades to the , typically after the is fully dilated and the is engaged in the maternal . Traction is then applied in alignment with the pelvic axis, synchronized with and maternal pushing efforts, to gently guide the through the birth canal. This technique is classified by the American College of Obstetricians and Gynecologists (ACOG) as outlet, low, mid, and high (though high is not recommended). Outlet forceps apply when the scalp is visible at the introitus without separating the , the fetal has reached the , and rotation does not exceed 45°. Low forceps are used when the leading point of the skull is at +2 cm or more but not on the , with subcategories for rotations of 45° or less and more than 45°. Mid forceps apply when the is 0 to +2 cm with the head engaged. Forceps-assisted vaginal deliveries have declined significantly, accounting for approximately 1.1% of vaginal births as of , reflecting a shift toward cesarean sections and in many cases. In gynecological procedures, forceps such as forceps play a crucial role in manipulating the to stabilize it during interventions. These single-toothed instruments grasp the anterior lip to straighten the endocervical canal, facilitating procedures like (IUD) insertion by allowing safe passage of the device through the os. In hysterectomies, forceps aid in elevating and steadying the for precise incision and of supporting structures. designs, characterized by curved blades to conform to the fetal head, may also be referenced in select gynecological contexts for tissue handling, though variants are more specialized for work. Specific techniques enhance the utility of forceps in , such as rotational maneuvers using Kielland forceps to address malpositions like occiput posterior , where the faces the mother's . These specialized forceps, with minimal pelvic curve and a sliding lock, enable rotations of up to 180° without excessive traction, improving alignment for . Post-delivery, forceps may assist in placental extraction by grasping the or membranes to apply controlled traction, aiding in the third stage of labor while minimizing risks. Training and guidelines for forceps use emphasize simulation-based education and adherence to ACOG protocols to ensure proficiency and . Operators must obtain , discussing potential fetal risks such as transient during application, alongside benefits like reduced cesarean rates in appropriate cases. ACOG recommends restricting high and mid forceps to experienced practitioners in facilities equipped for immediate cesarean conversion, promoting a shift toward lower classifications to optimize outcomes.

Non-Medical Applications

Forceps find extensive use in environments, where they facilitate safe and precise handling of materials without direct contact. In chemistry labs, , a type of non-locking thumb forceps, are employed to grasp and transport hot crucibles or evaporating dishes containing reactive substances, preventing burns and contamination. Similarly, in settings, dissecting forceps with fine, serrated tips allow for the manipulation of specimens, such as or tissues, during or examination, ensuring minimal damage to delicate structures. In industrial and technical applications, forceps variants serve as essential tools for intricate assembly tasks. Precision , often non-locking and made with anti-magnetic tips, are widely used in electronics manufacturing to position and small components like resistors or integrated circuits on circuit boards, where must be avoided. In jewelry making, locking forceps provide a secure grip for setting gemstones into metal frameworks, allowing artisans to hold prongs steady during or without slippage. Household adaptations of forceps, commonly known as , extend their utility to everyday grooming and minor . Slanted-tip tweezers are routinely used for plucking eyebrows or removing ingrown hairs, offering controlled precision for personal care routines. For splinter removal, fine-point enable users to extract embedded fragments from the skin after sterilization, reducing risk in non-clinical settings. Material variations enhance forceps suitability for non-medical tasks, particularly in environments involving heat or chemicals. Plastic forceps, such as those made from Delrin, offer heat resistance up to 150°C and non-conductive properties, making them ideal for handling warm samples without or sparking. Ceramic-tipped forceps provide superior endurance, withstanding temperatures up to 1000°C, and are preferred for high-heat applications like furnace work in labs.

Safety and Considerations

Selection and Usage Guidelines

The selection of forceps for clinical procedures hinges on the intended function, characteristics, and to optimize performance while minimizing potential disruption. For tasks involving traction on robust s, such as muscle or , toothed or traumatic forceps provide a secure grip through interlocking serrations, reducing slippage during manipulation. Conversely, atraumatic forceps with smooth or finely serrated tips are selected for delicate structures like blood vessels or to avoid or crushing. Instrument size is chosen based on the surgical site, with finer, shorter forceps (e.g., 10-15 cm) suited for microsurgery and longer variants (e.g., 20-25 cm) for deeper abdominal access. Stainless steels as specified in ISO 7153-1 (including martensitic and austenitic types) are standard due to their resistance and ability to withstand sterilization; non-magnetic austenitic steels are often preferred for atraumatic designs to ensure compatibility with and . Hygiene considerations favor single-use or disposable forceps for low-risk, high-volume procedures to eliminate reprocessing needs, while reusable metal models are preferred for tasks requiring superior tactile , provided rigorous protocols are followed. Proper usage begins with grip technique: a pencil hold, where the forceps are grasped between the thumb and with the middle finger providing support, enables fine control and reduces hand fatigue during prolonged operations. The instrument should be angled parallel to the plane to facilitate targeted application and limit incidental with adjacent structures. In sterile environments, tips must remain downward to prevent fluid migration along the shaft, which could compromise the field; transfer forceps like Cheatle models are employed solely for moving sterile items without direct hand . Protocols for single-use versus reusable forceps emphasize prevention: single-use devices are opened directly onto the sterile and discarded post-procedure, whereas reusables undergo validated reprocessing, including enzymatic , ultrasonic rinsing, and sterilization per AAMI/ANSI ST79 guidelines. for specialized applications, such as , incorporates simulation-based curricula using pelvic models to practice blade placement and traction trajectories, enhancing procedural competence without patient risk. Standardization ensures interoperability and safety; ISO/TC 170 classifies surgical instruments, including forceps, by performance criteria like jaw alignment, ratchet function, and material integrity, with specific requirements for non-locking and locking variants outlined in ISO 7153 series documents.

Risks, Complications, and

The use of forceps in medical procedures carries inherent risks, primarily related to trauma resulting from excessive or improper application of force. In surgical contexts, excessive pressure can cause bruising, lacerations, or unintended damage to delicate tissues, while poor grip may lead to slippage of vessels during , potentially resulting in hemorrhage. In obstetrical applications, risks include maternal perineal and vaginal lacerations, as well as fetal facial marks or bruising from blade contact; additionally, inadequate sterilization heightens the risk of surgical site infections, which occur in 0.1-2% of procedures depending on the site and implant involvement. Fetal may arise if delivery is prolonged due to application challenges, though this is mitigated by timely intervention. Complications from forceps use can be significant, particularly in where maternal outcomes include postpartum hemorrhage in up to 33% of cases and obstetric anal injuries in 18-25% of deliveries. Neonatal complications encompass palsy from compression, occurring in a subset of cases, and more severe issues like or subgaleal , with severe rates around 0.96% in instrument-assisted births. In surgical , vessel slippage can exacerbate bleeding if forceps fail to maintain secure , though such events are rare with proper technique. Overall, serious injury rates in forceps-assisted vaginal births range from 1-2%, underscoring the need for cautious application. As of 2025, forceps use has declined significantly to approximately 0.5% of vaginal deliveries in the , driven by rising C-section rates (now over 32%) and debates over operator training, with some institutions restricting or eliminating its practice to prioritize safer alternatives. Proper is essential to minimize risks and ensure integrity. Reusable forceps must undergo thorough cleaning with neutral detergents and enzymatic cleaners immediately after use, followed by disassembly, rinsing, and drying to prevent residue buildup. Sterilization typically involves autoclaving at 121°C for 15-30 minutes or 132-134°C for 3 minutes under pressure, with biological indicators like spores used to verify efficacy; instruments should be inspected for wear, lubricated at joints, and stored in low-humidity environments to avoid . Disposable forceps alternatives reduce cross- risks by eliminating reprocessing needs, though they must still be handled sterilely; studies indicate reusables, when properly maintained, pose low contamination risk but require strict adherence to protocols. Mitigation strategies emphasize operator expertise, with experienced practitioners lowering complication rates through simulation training and precise technique. Alternatives such as are preferred when feasible, as they associate with fewer maternal injuries compared to forceps. is critical, involving discussion of risks like 15-22% obstetric anal injury rates and alternatives, using antenatal and perineal techniques such as warm compresses to further reduce lacerations. Legal and ethical guidelines mandate documenting these discussions to ensure patient .