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Skin Wellness 

Center for Advanced Dermatology and Laser

The Doctor's Blog

The Doctor's Blog

What is SUBCISION?

Posted on July 26, 2016 at 9:40 PM

Subcision

 

What is subcision and how does it work?

 

Subcision is a minor surgical procedure used for treating depressed cutaneous scars and wrinkles. It is also called subcutaneous incisional surgery.

 

Subcision is performed using a special hypodermic needle inserted through a puncture in the skin surface. The sharp edge of the needle is used to break fibrotic strands that are tethering the scar to the underlying tissue.

 

The release of the fibrotic strands and new collagen deposition caused by wound healing leads to cosmetic improvement of the scar. Subcision can be safely performed in the outpatient setting and is usually well tolerated.

 

What are the indications for subcision?

 

The decision to perform subcision will depend on the type, location, and severity of scarring; patient preference and expectations; and clinician experience and expectations.

 

Subcision may be used for the treatment of:

 

Depressed distensile scars (due to acne, trauma, surgery )

Depressed bound down scars (due to acne*, varicella (chickenpox), trauma, surgery )

Depressed skin grafts

Wrinkles

Cellulite dimples

*excluding deep ice-pick scars

 

Acne scarring

Rolling acne scars © Dr Ph Abimelec

dermatologue Acne scarring

Boxcar acne scars

Acne scars

What are the contraindications to subcision?

 

Subcision may not be suitable in the following circumstances:

 

Patients with a history of hypertrophic or keloid scars

Current or recent (within 6 months) systemic oral retinoid (eg acitretin, isotretinoin)

Bleeding or blood clotting disorders (coagulopathy)

Active bacterial or viral infection

Assessment of acne scars

 

Acne scar severity can be graded using Goodman and Baron’s qualitative acne scar grading system to allow objective pre and post-treatment comparisons.

 

1. Macular scars

 

Macular scars can be erythematous, hyperpigmented (brown) or hypopigmented (pale) flat marks. They do not represent a problem of contour like other scar grades but of color.

 

2. Mild atrophic or hypertrophic scars

 

Mild atrophic (thin) or hypertrophic (thick) scars may not be obvious at social distances of 50 cm or greater and may be covered adequately by makeup or the normal shadow of shaved beard hair in men or normal body hair if extrafacial.

 

3. Moderate atrophic or hypertrophic scars

 

Moderate atrophic or hypertrophic scarring is obvious at social distances of 50 cm or greater and is not covered easily by makeup or the normal shadow of shaved beard hair in men or body hair if extrafacial, but is still able to be flattened by manual stretching of the skin (if atrophic).

 

4. Severe atrophic or hypertrophic scars

 

Severe atrophic or hypertrophic scarring is evident at social distances greater than 50 cm and is not covered easily by makeup or the normal shadow of shaved beard hair in men or body hair if extrafacial and is not able to be flattened by manual stretching of the skin.

 

How is subcision performed?

 

The procedure of subcision is described below.

 

The area to be treated is cleansed to remove dirt and make-up

The scar margins may be defined with a surgical marker, adjusting overhead lighting to delineate depressions.

Local anaesthetic is infiltrated.

A tri-bevelled needle (number 18 or 20 gauge) or a Nokor needle (fig.3) is inserted at an acute angle adjacent to the scar with the bevel upwards and parallel to the skin surface. Smaller gauge needles (25–27) may be used for small superficial scars and wrinkles.

The needle is advanced through the dermis and moved back and forth in a fan-like motion. A snapping sound is heard as fibrous bands are transected in the deep dermis and deep dermal subcutaneous plane.*

The needle is rotated 90 degrees and moved again in a fan-like motion through the dermal scar (fanning subcision).

The needle is removed and squeezed circumferentially around the exit point to prevent large haematoma formation due to bleeding.

Manual pressure is applied to the wound for several minutes.

*A common pitfall is to fan too deeply in a plane below the dermis

 

Nokor needle Subcision procedure Subcision procedure Subcision procedure

The fanning subcision procedure used to treat acne scars

After the procedure

 

Immediately after subcision:

 

Pressure and ice are applied to the operated site to maintain haemostasis and reduce the risk of bleeding.

Make-up may be applied to camouflage bruised areas.

Some authors recommend antibiotics and anti-inflammatory medication.

The number and intensity of subcisions should be limited on the first treatment to review the patient’s response, particularly when treating areas with a predilection for a hypertrophic reaction after subcision.

 

How many treatments are required?

 

Individuals vary in their ability to form collagen (scar tissue). The number of subcisions required to correct a depression will depend on the type, location, severity of depression, and intensity of treatment.

 

Three to six visits suffice for the majority of cases of moderate scarring. Intervals of at least one month in-between treatments are generally recommended.

 

What are the complications of subcision?

 

The risks and complications of subcision include:

 

Haematoma due to bleeding (a small haematoma is normal)

Pain/tenderness of treated sites

Hypertrophic scars (5–10%) or keloid scars, which are most likely in periorbital skin, glabella, labial commissure and upper lip

Infection; this usually presents as localised acneform papule or pustule

Temporary post-inflammatory hyperpigmentation (advise sun protection/avoidance)

Sub-optimal response or lack of improvement in scarring

Injury to nerve or blood vessel, which is most likely in mandibular, temporal and pre-auricular sites

Treatments combined with subcision

 

Subcision as an acne scar treatment can be effectively combined with:

 

Topical retinoids

Microneedling — Dermaroller, Dermapen, which may be safely performed > 1 day after subcision

Acid peels, eg 15% trichloracetic acid applied every 4 weeks

TCA CROSS

Fractional laser treatment

What is the outcome after subcision?

 

In appropriate cases, the results can be excellent. Treatment may need to be repeated.

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