Craniotomy Instrument Set: Cranial Surgery Instruments, Dura Tools and Planning

Craniotomy instruments: the main groups

A cranial set is usually built from five groups: scalp instruments (scalpels, haemostatic clips and forceps, scalp retractors), bone instruments (elevators, burr or perforator tools, Gigli saw and guides, rongeurs), dura instruments (dissectors, hooks, scissors, forceps), brain retraction and suction, and closure instruments.

In many centres the bone work is done with powered craniotomes and drills that are sold as separate motor systems, while the hand instruments handle everything else. Decide which parts of the procedure will be covered by hand instruments and which by power systems, because this changes the size of the tray.

Positioning equipment such as head holders and the operating table are outside this tray, but they influence which retractors and suction tips can be used, so involve the neurosurgical team in decisions about the set at an early stage.

Cranial surgery instruments for the dura

Dura instruments protect the brain while the bone flap is lifted and while the dura is opened and closed. They include dissectors to separate the dura from the bone, hooks and fine forceps to lift it, and scissors to cut it. These pieces must be fine and smooth-tipped to avoid tearing the dura.

REDA's neurosurgery section lists dura dissectors and nerve hooks, Cushing and Rhoton-type dissectors in its microsurgical portfolio, Fergusson and Frazier suction tubes, Yasargil micro instruments and Hardy instruments for pituitary surgery. Confirm availability of specific cranial bone instruments such as perforators or Gigli saws with the supplier, as they are not listed in this section.

A practical point is traceability. Because cranial instruments are fine and are used close to critical structures, hospitals often keep a log of which tray was used on which patient, together with the sterilization cycle record, in line with local policy.

• Dura dissectors with different tip angles.
• Fine, atraumatic forceps and micro scissors for the dura.
• Suction tubes in several sizes (Frazier and Fergusson patterns).
• Nerve hooks and brain retractors for exposure.

Craniotomy set list: bone, retraction and closure

A typical craniotomy set list for the bone phase includes periosteal elevators, a burr hole tool or perforator, a Gigli saw and guides or a craniotome, bone rongeurs and a bone-wax applicator. Retraction uses brain spatulas, self-retaining systems and cottonoid patties, and closure needs needle holders, dural substitutes and plating tools.

Many of these items are general-purpose instruments. Rongeurs, elevators and needle holders are described in bone rongeurs and periosteal elevators. For the broader hub list see the neurosurgery instruments list.

Quantity planning should reflect that cranial cases are long and that suction tubes, dissectors and cottonoid-handling forceps may be needed in duplicate during a single case.

Microsurgical tray versus basic tray

A microsurgical tray is built around fine instruments used under the microscope: micro scissors, bayonet forceps, micro dissectors and aneurysm clips with appliers. REDA lists Yasargil aneurysm clips with applying forceps, Acland micro vessel clips and Biemer and Mueller approximators in its neurosurgery portfolio.

Keep microsurgical items separate from the basic tray so they are not damaged during the bone phase. See Yasargil microneurosurgery instruments for the micro set.

Planning, care and buying

Plan trays by procedure and surgeon, label them clearly and count every sharp, clip and cottonoid. Cranial instruments have fine tips and delicate joints and should be handled with care in reprocessing. Inspect them under magnification and keep records of repairs.

Ask your supplier for item lists, sizes, steel and finish and repair services, and check current MOHAP, DHA or DOH requirements. Beckfinity can help you compile a quote for neurosurgical hand instruments from the REDA range.