What is the correct technique for performing a continuous (running) subcuticular suture using a slowly absorbable monofilament in a healthy adult Asian patient undergoing a sub‑brow lift?

Running Subcuticular Suture Technique for Sub-Brow Lift

For a sub-brow lift in a healthy adult Asian patient, use a continuous subcuticular technique with slowly absorbable monofilament suture (4-0 poliglecaprone or polyglactin), starting deep and running superficially through the dermis to exit at the wound end, then burying both ends to eliminate visible suture material. 1

Optimal Suture Material Selection

• Slowly absorbable monofilament sutures (4-0 poliglecaprone [Monocryl] or 4-0 polyglactin [Vicryl]) are the preferred materials because they retain 50-75% tensile strength after 1 week, providing extended wound support throughout the critical healing period. 1

• Monofilament sutures generate less bacterial seeding than multifilament materials and consequently lower the risk of surgical site infection, making them particularly advantageous for facial wounds. 2, 1

• Standard (slowly) absorbable sutures maintain adequate tensile strength for 90-110 days, which is essential for facial wounds where cosmetic outcome depends on prolonged support. 1, 3

Step-by-Step Technical Execution

Starting the Suture

• Begin by burying the needle entry point deep in the wound at one apex, passing through the dermis to anchor the suture without leaving any external knot or tail. 4

• The initial bite should be placed in the deeper dermis to establish a secure starting point that will remain hidden once the wound is closed. 4

Running the Subcuticular Path

• Advance the needle horizontally through the dermis at the same depth on alternating sides of the wound, taking small bites (approximately 5mm) that remain entirely within the dermal layer without penetrating the epidermis. 1, 5

• Maintain consistent depth throughout the closure—the suture should run in the subcuticular plane, which is the layer just beneath the epidermis but above the deeper subcutaneous fat. 3, 5

• Keep the suture path parallel to the skin surface, creating a zigzag pattern that distributes tension evenly along the wound length. 5

Maintaining Proper Tension

• Avoid pulling the suture too tightly, as excessive tension strangulates wound edges, causes tissue ischemia, and paradoxically increases dehiscence risk. 1

• The wound edges should approximate naturally without blanching or puckering when proper tension is applied. 5

Terminating the Suture

• Exit the final pass deep in the dermis at the opposite wound apex, then bury the terminal end by passing back through deeper tissue to eliminate any visible suture material on the skin surface. 4

• Both the starting and ending points should be completely buried, leaving no external suture tails that would require removal. 4

Evidence Supporting This Technique

• Continuous subcuticular sutures reduce superficial wound dehiscence by 92% (RR 0.08; 95% CI 0.02-0.35) compared to interrupted transcutaneous sutures. 1, 6

• The dramatic reduction in dehiscence occurs because absorbable subcuticular material provides prolonged wound support without requiring removal at 7-9 days, unlike interrupted non-absorbable sutures. 1, 6

• No significant difference exists in surgical site infection rates between continuous and interrupted techniques (RR 0.73; 95% CI 0.40-1.33), confirming that the continuous method does not increase infection risk. 1, 6

• In facial wounds specifically, studies comparing absorbable versus non-absorbable sutures found no difference in long-term cosmetic outcomes at 6-month follow-up, supporting the use of absorbable materials for facial closure. 7

Critical Pitfalls to Avoid

• Never use rapidly absorbable sutures (such as Vicryl Rapide) for deep tissue closure—these materials lose tensile strength too quickly and are appropriate only for superficial skin approximation where they maintain adequate strength during the 7-10 day critical healing window. 1

• Do not incorporate subcutaneous fat or muscle tissue in the subcuticular suture path; the needle should pass only through dermis to avoid tissue compression, devitalization, and increased infection risk. 1

• Avoid multifilament (braided) sutures when monofilament options are available, as the interstices within braided material can harbor bacteria and increase infection risk. 2, 1

• Do not leave any suture material exposed on the skin surface—both ends must be buried to eliminate the need for removal and to optimize cosmetic outcome. 4

Postoperative Monitoring

• Monitor for signs of infection (increasing pain, erythema, warmth, purulent drainage) during the first 7-10 days, which represents the highest-risk period for complications. 1

• Watch for wound dehiscence, particularly in the first week when tensile strength is still developing, though the continuous subcuticular technique dramatically reduces this risk. 1, 6

• The absorbable suture will maintain wound support throughout the healing process and does not require removal, eliminating patient anxiety and discomfort associated with suture extraction. 7