Misc. Surgical Procedures

Diagnostic Procedures

Conducted before mass removal to create a comprehensive treatment plan tailored to the individual patient's needs.

Fine Needle Aspiration (FNA):
  • A minimally invasive procedure aimed at obtaining cellular material for evaluation.

  • Low diagnostic yield, often resulting in non-diagnostic samples.

  • Impression smears are utilized to provide additional cytological information for improved diagnostic accuracy.

Needle Punch Biopsy:
  • A minimally invasive intervention designed for obtaining tissue samples from external skin or oral masses.

  • Requires sedation to ensure patient comfort during the procedure.

  • Typically performed under general anesthesia to collect larger surface samples, providing better diagnostic insight compared to FNA.

Bone Biopsy:
  • Techniques include Michele trephine and Jamshidi methods, which are specifically designed for obtaining bone tissue.

  • Conducted under general anesthesia to minimize patient discomfort and movement during the collection.

  • Essential for diagnosing bone lesions or tumors, allowing for histopathological evaluation.

Incisional Biopsy:
  • Implies sampling of tissue after initial cytology or needle core biopsy fails to provide a definitive diagnosis.

  • Often involves a wedge-shaped incision carried out under general anesthesia, effectively obtaining a larger tissue volume for further analysis.

Excisional Biopsy:
  • Encompasses complete removal of an entire mass, enabling both diagnostic and therapeutic outcomes.

  • Commonly indicated for lesions suspected of being benign tumors, allowing for full histological assessment and immediate treatment.

Sample Handling

Proper handling of samples is critical to preserving their integrity for accurate diagnosis.

Impression Smears:
  • Prepared before placing the sample in fixative to retain cellular architecture for microscopic evaluation.

  • Mark margins from the surgical excision meticulously with india ink or alcian blue to ensure clear identification of tissue boundaries.

  • Allow to dry for at least 20 minutes before fixing the sample, preventing distortion.

Fixatives:
  • 10% neutral buffered formalin is the standard fixative used to preserve tissue samples.

  • Maintain a ratio of 1:10 formalin to tissue volume; for samples thicker than 1 cm, slice into 1 cm sections similar to a loaf of bread to ensure proper fixation.

Labeling of Samples:
  • Essential information to include on sample labels:

    • Date of collection

    • Patient's last name and hospital ID

    • Site of sample collection

  • Use a pencil to mark cytology slides to prevent smearing or fading of information.

Documentation:
  • Comprehensive documentation should encompass:

    • Patient history and signalment (age, breed, sex)

    • Clinical findings and any pre-existing conditions

    • Tentative or definitive diagnosis made prior to biopsy/surgical intervention.

Aural Procedures
Auricular Hematoma:
  • Commonly involves an incisional drainage procedure aimed at relieving fluid buildup in the ear flap.

  • Procedures like Total Ear Canal Ablation (TECA) are employed in cases of chronic ear infections, neoplasia, or polyps that do not respond to medical management.

Ophthalmic Procedures
Entropion:
  • Characterized as "rolling in" of the eyelids, leading to ocular irritation and discomfort, with clinical signs such as:

    • Blepharospasm (excessive blinking)

    • Photophobia (sensitivity to light)

    • Enophthalmos (retraction of the eyeball)

    • Conjunctivitis (inflammation of the conjunctiva)

    • Keratitis (inflammation of the cornea).

Surgical Options for Entropion:
  • Eyelid Tacking:

    • Used in young puppies (16-20 weeks old) with conformational entropion to temporarily hold eyelids in a proper position.

  • Hotz-Celsus Procedure:

    • Involves the removal of a "smile" shaped piece of skin from the affected eyelid, which is the most widely used technique for permanent correction of entropion.

Eyelid Mass:
  • Canine eyelid masses are generally benign, with Meibomian adenoma being the most common type.

  • Feline eyelid masses tend to be more aggressive; squamous cell carcinoma is predominant in cats.

  • Surgical options include wedge resection or complete removal of the mass, depending on the diagnosis and extent of the tumor.

Cherry Eye:
  • Represents the protrusion of the gland of the nictitating membrane, common in certain dog breeds.

  • Surgical approach: Morgan Pocket Technique involves creating a conjunctival pocket where the third eyelid gland can be secured back in place to prevent recurrence.

Special Instruments

Instruments used in surgical procedures include:

  • Bishop-Harmon Forceps: Ideal for holding delicate tissue.

  • Chalazion Forceps: Used for treating chalazia by excising the gland.

  • Jaeger Lid Plate: Assists in eyelid surgeries by retracting tissues.

  • Stevens Tonotomy Scissors: Used for cutting delicate tissues around the eye.

  • Micropoint Needle Holders: Essential for handling fine sutures.

  • Dessmar Lid Retractor: Provides exposure during eyelid and conjunctival procedures.

Onychectomy
Feline Declaw:
  • Involves the removal of the claw along with the associated third phalanx, predominantly performed on front feet only for behavioral management and to protect household items.

  • Surgical options available include:

    • Amputation of the third phalanx with a Roscoe nail trimmer using a 12 blade or CO2 laser, leading to less pain and minimal complications compared to traditional methods.

Declawing Surgery Mechanics:
  • Involves 10 separate and painful amputations, raising ethical concerns among veterinarians and pet owners alike.

  • Key anatomical structures affected include:

    • Line of amputation, third phalanx, ungual process, ungual crest, flexor tendon, dorsal ligaments.

Tail Docking
Procedure Overview:
  • Partial amputation of the tail, recommended for specific breeds according to AKC standards to prevent injuries or infections.

  • Typically performed on puppies aged 3 to 5 days, taking advantage of their healing abilities.

  • Conducted without general anesthesia, utilizing scissors for the cut, thus minimizing procedural risks.

  • Bleeding is controlled via electrocautery or applying pressure, and typically one interrupted suture is placed to appose skin edges for optimal healing.