5.2 Cutting, Dissecting, Grasping, and Holding Instruments

Cutting, Dissecting, Grasping, and Holding Instruments

Quick Answer: Cutting and dissecting instruments incise, excise, and separate tissue planes (scalpels, dissecting scissors, osteotomes), while grasping and holding instruments stabilize tissue for exposure or dissection (forceps, tenacula, ringed clamps, needle drivers). Key essentials: #10 blade on a #3 handle for skin incisions; #11 blade for stab incisions/arteriotomies; #15 blade for pediatric/plastic fine cuts; Metzenbaum scissors for delicate soft tissue dissection (never suture!); Mayo scissors for heavy fascia and suture; DeBakey forceps for atraumatic vascular/visceral handling; Babcock clamps for delicate tubular organs; Allis clamps for tough fascia; and Castroviejo needle holders for microsurgery.

Accurate instrument selection directly influences operative speed, tissue viability, and postoperative wound healing. The surgical technologist must master the functional taxonomy of cutting, grasping, and holding tools to deliver precise instrumentation throughout each phase of the surgical procedure.

---

1. Scalpel Handles, Surgical Blades, and Safety Mechanics

Scalpels are the primary sharp cutting instruments utilized to incise cutaneous tissue and dissect dense connective structures. The standard Bard-Parker system pairs interchangeable, disposable surgical blades with reusable stainless steel handles.

                      SCALPEL HANDLE AND BLADE PROFILES

  1. #10 BLADE (#3 Handle)            2. #11 BLADE (#3 Handle)
     +-------------..                     +------------------\
     |               \_                   |                   \
     |______    _______\                  |____________________\
            \__/ (Curved Belly)                                  (Sharp Point)

  3. #12 BLADE (#3 Handle)            4. #15 BLADE (#3 Handle)
     +------------\                       +--------------.
     |             \_                     |               \_
     |______  _     _\                    |_______   ______\
            \/ \___/ (Hook / Tonsil)              \_/ (Mini #10)

Scalpel Handle Classifications

• #3 Handle: Standard length (approx. 5 inches). Fits small blades (#10, #11, #12, #15). Standard for superficial incisions in general, abdominal, and orthopedic surgery.
• #3L (Long) Handle: Elongated version of the #3 handle (approx. 8 inches). Fits #10, #11, #12, #15 blades. Used for deep pelvic, abdominal, or thoracic cavities.
• #4 Handle: Heavy, broad body with a larger fitting tip. Fits large blades (#20, #21, #22, #25). Used for thick skin and heavy fascia in orthopedics, trauma, and autopsy.
• #7 Handle: Slender, elongated, pen-like handle. Fits #10, #11, #12, #15 blades. Used for deep, confined, or delicate spaces (ENT, plastic, oral, and vascular surgery).
• #9 Handle: Ultra-fine, miniature handle designed for ophthalmic and microsurgical procedures.
• Beaver Handle: Specialized cylindrical, knurled handle designed for miniature threaded micro-blades used in ophthalmic, otologic, and podiatric surgery.

Surgical Blade Specifications and Applications

Sharps Safety & Neutral Zone Mandate

• Blade Loading & Unloading: Blades must NEVER be loaded or removed with bare fingers or gloved hands. Always grasp the non-cutting proximal edge of the blade with a heavy needle holder (or designated blade remover device), align the mounting groove with the handle shank, and slide it until it clicks into place.
• Sharps Neutral Zone (Hands-Free Technique): OSHA and AST standards mandate establishing a dedicated neutral zone (e.g., magnetic pad, transfer basin, or designated field zone). Scalpels and loaded needle holders are placed in the neutral zone rather than passed hand-to-hand, preventing accidental sharps punctures.

---

2. Surgical Scissors

Surgical scissors divide into dissecting scissors (for living human tissue) and utility/suture scissors (for inanimate materials). Using delicate tissue scissors on suture, mesh, or wire irreversibly damages the blade alignment and cutting edge.

                      SURGICAL SCISSORS COMPARISON

  1. METZENBAUM DISSECTING           2. CURVED MAYO DISSECTING
     (Delicate, slender shanks,          (Heavy, thick beveled blades,
      thin curved blunt blades)           dense fibrous fascia/tendons)

  3. STRAIGHT MAYO (Suture)          4. POTTS-SMITH (Vascular)
     (Heavy flat blades, cuts            (Angled 25°-60° blades, extends
      suture, drains, mesh)               arteriotomy/venotomy)

---

3. Non-Locking Grasping Instruments (Tissue Forceps / Pickups)

Tissue forceps (pickups) are hand-held spring-tension instruments without ratchets. They are held like a pencil between the thumb and first two fingers to manipulate tissue during dissection and suturing.

                     TISSUE FORCEPS TIP GEOMETRY

  1. ADSON 1x2 TEETH       2. BROWN-ADSON (7x7)      3. DeBAKEY ATRAUMATIC
     +---/\---+                +---|::|---+              +---|:::|---+
     |  |  |  |                |   |::|   |              |   |:::|   |
     +---\//--+                +---|::|---+              +---|:::|---+
     (Skin closure)            (Plastics/SubQ)           (Vascular / Viscera)

• Adson Tissue Forceps (1x2 Teeth): Features fine tips with a single tooth on one side interlocking between two teeth on the opposing side. Used to grasp epidermal and dermal skin edges during wound closure with minimal crushing.
• Plain Adson Forceps (Smooth): Features fine transverse serrations without teeth. Used to grasp delicate subcutaneous fat, minor tissues, or apply delicate dressings.
• Brown-Adson (Adson-Brown) Forceps: Features broad tips equipped with multiple longitudinal rows of fine micro-teeth (typically 7x7 or 9x9). Provides a non-slip, secure grasp on delicate plastic, hand, and subcutaneous tissues without tearing.
• DeBakey Atraumatic Tissue Forceps: Long, slender, flexible shanks terminating in patented longitudinal parallel micro-ridges and cross-interlocking serrations. The gold standard atraumatic forceps for vascular, cardiovascular, thoracic, pediatric, and delicate visceral tissue.
• Ferris-Smith Tissue Forceps: Heavy, wide-bodied forceps with a large textured thumb grip and 2x3 heavy interlocking teeth. Used in orthopedic and spinal surgery to grasp tough fascia lata, joint capsules, and tendon.
• Russian Tissue Forceps: Broad, circular spoon-shaped (cup) fenestrated tips with radial serrations. Used to grasp dense, slippery tissues (uterus during cesarean section, gall bladder, ovary, spleen) without puncturing the organ capsule.
• Gerald / Cushing Forceps: Ultra-slender, elongated forceps (smooth or 1x2 teeth) designed for deep, narrow operative corridors in neurosurgery, microvascular, and ENT.
• Bayonet Forceps (Jansen, Gruenwald): Features angled shanks that offset the surgeon's hand from the line of sight, allowing an unobstructed view down deep, narrow anatomical canals (ear canal, nasal cavity, intracranial cavities).

---

4. Ringed Grasping and Holding Instruments

Ringed grasping instruments feature ratchets to maintain sustained traction on tissues, organs, or bone:

                    RINGED GRASPING JAW PROFILES

  1. BABCOCK (Atraumatic)             2. ALLIS (Traumatic / Teeth)
         ____/---\____                       +---/\/\/\/\---+
        (     (_)     )                      |   ||||||||   |
         \___________/                       +---\///\/\/---+ 
      (Flared triangular loop)             (4x5 or 5x6 interlocking teeth)

• Babcock Forceps: Distinctive atraumatic flared, triangular fenestrated loops. The curved, smooth edges cradle and hold delicate tubular organs (fallopian tubes, ureters, vermiform appendix, bowel loops) without crushing or compromising blood supply.
• Allis Clamp: Features multiple fine interlocking teeth (4x5 or 5x6 teeth) on broad jaws. Delivers aggressive, secure grip on fibrous fascia, tendon, cysts, and tissue destined for excision. Considered traumatic if applied to viable delicate viscera.
• Foerster Sponge-Stick (Sponge Forceps): Features oval, fenestrated jaws (smooth or serrated). Used to hold folded 4x4 Raytec sponges for surgical skin antisepsis prep, deep pelvic fluid blotting, blunt swab dissection, or grasping gall bladder.
• Pennington Clamp: Features broad triangular fenestrated jaws. Used to grasp lung tissue during thoracic surgery, hold rectal tissue during hemorrhoidectomy, or grasp the uterine wall during cesarean delivery.
• Schroeder / Pozzi Tenaculum: Features single or multiple sharp, claw-like prongs. Used to pierce and manipulate dense fibrous structures, such as the uterine cervix during gynecologic procedures or thyroid lobes during thyroidectomy.
• Lowman and Lewin Bone-Holding Clamps: Heavy ratcheted or thumbscrew clamps with curved jaws designed to securely grasp and stabilize bone fragments during orthopedic fracture reduction and internal fixation.

---

5. Needle Holders (Needle Drivers)

Needle holders grasp and drive curved surgical suture needles through tissue planes.

Needle Loading Mechanics & Safety Rules

1. Placement: Clamp the needle one-third to one-half the distance from the swaged (thread) end to the needle point. Clamping directly on the swaged junction weakens the suture bond; clamping on the needle point dulls the cutting tip.
2. Angle: Mount the needle perpendicular (90 degrees) to the jaws of the needle holder.
3. Hand-Off: Pass needle holders with the needle point directed toward the surgeon's chest (for right-handed surgeons, point facing left) in the ready-to-suture orientation via the neutral zone.