Perforator flaps

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Perforator flap surgery is a technique used in reconstructive surgery where skin and/or subcutaneous fat are removed from a distant or adjacent part of the body to reconstruct the excised part. [1] The vessels that supply blood to the flap are isolated perforator(s) derived from a deep vascular system through the underlying muscle or intermuscular septa. Some perforators can have a mixed septal and intramuscular course before reaching the skin. The name of the particular flap is retrieved from its perforator and not from the underlying muscle. [1] If there is a potential to harvest multiple perforator flaps from one vessel, the name of each flap is based on its anatomical region or muscle. For example, a perforator that only traverses through the septum to supply the underlying skin is called a septal perforator. Whereas a flap that is vascularised by a perforator traversing only through muscle to supply the underlying skin is called a muscle perforator. [1] According to the distinct origin of their vascular supply, perforators can be classified into direct and indirect perforators. Direct perforators only pierce the deep fascia, they don't traverse any other structural tissue. Indirect perforators first run through other structures before piercing the deep fascia. [1]

Contents

Overview

Soft tissue defects due to trauma or after tumor extirpation are important medical and cosmetic topics. Therefore, reconstructive surgeons have developed a variety of surgical techniques to conceal the soft tissue defects by using tissue transfers, better known as flaps. In the course of time these flaps have rapidly evolved from "random-pattern flaps with an unknown blood supply, through axial-pattern flaps with a known blood supply to muscle and musculocutaneous perforator flaps" for the sole purpose of optimal reconstruction with minimum donor-site morbidity. [2] Koshima and Soeda were the first to use the name “perforator flaps” in 1989 [3] and since then perforator flaps have become more popular in reconstructive microsurgery. [1] Thus perforator flaps, using autologous tissue with preservation of fascia, muscle and nerve represent the future of flaps. [4] The most frequently used perforator flaps nowadays are the deep inferior epigastric perforator flap (DIEP flap), [5] [6] and both the superior and inferior gluteal (SGAP/ IGAP) flap, [7] all three mainly used for breast reconstruction; the lateral circumflex femoral artery perforator (LCFAP) flap (previously named anterolateral thigh or ALT flap) [8] and the thoracodorsal artery perforator (TAP) flap, [9] mainly for the extremities and the head and neck region as a free flap and for breast and thoracic wall reconstruction as a pedicled perforator flap.

Classification

Perforator flaps can be classified in many different ways. Regarding the distinct origin of their blood supply and the structures they cross before they pierce the deep fascia, perforators can either be direct perforators or indirect perforators. [10] We will discuss this classification based on the perforators' anatomy below.

Direct and indirect perforators Direct and indirect perforators.png
Direct and indirect perforators

[ citation needed ]

Direct cutaneous

Direct cutaneous perforators only perforate the deep fascia, they do not traverse any other structural tissue. [10]

It is questionable whether these perforators are true perforators, because it might be more logical to not include these perforators. The surgical approach needed for direct perforators is slightly different from the one needed for indirect perforators. When direct perforators are not included, surgeons can focus on the anatomy of the perforator and the source vessel. [1]

Indirect cutaneous

Indirect cutaneous perforators traverse other structures before going through the deep fascia. These other structures are deeper tissues, and consist of mainly muscle, septum or epimysium. [10] According to the clinical relevance, two types of indirect cutaneous perforators need to be distinguished. [1] We will clarify these two types below.[ citation needed ]

Muscle and musculocutaneous

Musculocutaneous perforators supply the overlying skin by traversing through muscle before they pierce the deep fascia. [1]

A perforator which traverses muscle before piercing the deep fascia can do that either transmuscular or transepimysial. This latter subdivision is however not taken into account during the dissection of the perforator. Only the size, position, and course of the perforator vessel are considered then. [1]

When a flaps’ blood supply depends on a muscle perforator, this flap is called a muscle perforator flap. [1]

Septal and septocutaneous

Septocutaneous perforators supply the overlying skin by traversing through an intermuscular septum before they pierce the deep fascia. These perforators are cutaneous side branches of muscular vessels and perforators. [1]

When a flap's blood supply depends on a septal perforator, this flap is called a septal perforator flap. [1]

Nomenclature

Due to confusion about the definition and nomenclature of perforator flaps, a consensus meeting was held in Gent, Belgium, on September 29, 2001. Regarding the nomenclature of these flaps, the authors stated the following:

"A perforator flap should be named after the nutrient artery or vessels and not after the underlying muscle. If there is a potential to harvest multiple perforator flaps from one vessel, the name of each flap should be based on its anatomical region or muscle." [1]

This so-called 'gent consensus' was needed because the lack of definitions and standard rules on terminology created confusion in communication between surgeons. [1]

Method of application

Flaps can be transferred either free or pedicled. Regarding the nomenclature, one is free to add the type of transfer to the name of a flap. [1]

Free perforator flaps

A free flap is defined as a tissue mass that has been taken away from the original site to be used in tissue transplantation. [11] When a surgeon uses a free flap, the blood supply is cut and the pedicle reattached to recipient vessels, performing a microsurgical anastomosis. [12]

For more information on free flaps, see also free flap.

Pedicled perforator flaps

Pedicled perforator flaps can be transferred either by translation or rotation. These two types will be discussed separately below.[ citation needed ]

Translation

This type of transfer is also called "advancement".The surgeon disconnects the flap from the body, except for the perforators. After this procedure, the flap is advanced into the defect. [13]

Rotation

The subgroup of pedicled perforator flaps, transferred in the defect by rotation is the so-called "propeller flap". Confusion concerning definition, nomenclature and classification of propeller flaps led to a consensus meeting similar to the "gent consensus meeting”. The consensus that was reached is named "the tokyo consensus". This article stipulates the definitions of propeller flaps and especially perforator propeller flaps. [14] The definition that was set up is cited below:

"A propeller flap can be defined as an “island flap that reaches the recipient site through an axial rotation.” Every skin island flap can become a propeller flap. However, island flaps that reach the recipient site through an advancement movement and flaps that move through a rotation but are not completely islanded are excluded from this definition. " [14]

Propeller flap Propeller flap.png
Propeller flap

Regarding the classification of propeller flaps, the surgeon should specify several aspects of these flaps. It is important that the type of nourishing pedicle, the degree of skin island rotation and, when possible, the artery of origin of the perforator vessel are mentioned. [14]

The perforator propeller flap is the propeller flap which is used most commonly. It is a perforator flap with a skin island, which is separated in a larger and smaller paddle by the nourishing perforator. These paddles can rotate around the perforator (pedicle), for as many degrees as the anatomical situation requires (90-180 degrees). This flap looks like a propeller when the two paddles are not too different in size. [14]

Fields of application

Trauma, oncological treatments or pressure ulcers can result in severe tissue defects. Those defects can be covered and closed by using autologe tissue transposition. The fact that each tissue defect is different makes it necessary for each tissue defect to be assessed individually. The choice of the type of tissue transposition depends on the location, nature, extent and status of the deformity. [15]

However, the health of the patient and possible contra-indications play an important role as well. Due to the development and improvement of cutaneous, myocutanous and fasciocutaneous tissue transpositions plastic surgeons are able to successfully restore the defect to its original shape. [15] Nevertheless, functional recovery is not guaranteed in all patients. For the optimal renewal of shape and function, a suitable flap can be chosen to reconstruct the defect. In the case of using a so-called perforator flap, a reliable vascularization and the possibility of sensory (re) innervation can be combined with less donor-site morbidity and limited loss of function in the donor area. [15]

Oncological background

The surgical removal of both benign and malignant tumors often result in serious tissue defects involving not only soft tissue but also parts of the bone. [16] Depending on the location aneligible flap can be selected. In breast reconstruction for example, perforator flaps have raised the standard by replacing like with like. [17] When taking breast reconstruction into consideration, several surgical options are available to achieve lasting natural results with decreased donor-site deformities. The broad option of donor-sites makes practically all patients candidates for autogenous perforator flap reconstruction. [17] Some examples include, Deep inferior epigastric perforator flap (DIEP flap), superior gluteal (SGAP) flaps and inferior gluteal (IGAP) flaps.[ citation needed ]

Traumatic background

Treatment of tissue defects caused after a trauma present major surgical challenges especially those of the upper and lower limb, due to the fact that they often not only cause damage to the skin but also to bones, muscles/tendons, vessels and/or nerves. [18]

If there is extensive destruction a fasciotomy is needed, therefore it is generally accepted that the best way to cover these types of tissue defects is a free flap transplantation. [18] [19] [20] Nevertheless, over the years surgeons have tried to increase the application of perforator flaps, due to their proven advantages. In the case of upper limb surgery, perforator flaps are successfully used in minor and major soft tissue defects provided that in major defects the flap is precisely planed. [18] [21]

In lower limb surgery there have also been reports of successful use of perforator flaps. [22] [23]

Advantages and disadvantages

Twenty three years after the first perforator flap was described by Koshima and Soeda, [3] there has been a significant step towards covering tissue defects by using only cutaneous tissue. [24] Results obtained from studies done on musculocutaneous and septocutaneous perforator flaps have shown a reduction of donor-site morbidity to a minimum [24] [25] due to refined perforator flap techniques that allow collection of tissue without scarifying the underlying muscles. [24] [26] As a matter of fact, preventing damage to the underlying muscle including its innervation, has led to less cases of abdominal hernia, [26] the absence of postoperative muscle atrophy [27] and a better vascularised and functioning donor muscle. [17] Furthermore, patients have shown decreased postoperative pain and accelerated rehabilitation [17] [25] Nevertheless, there will always be a chance that the displaced tissue partially or completely dies considering the fact that the perfusion of the flap is difficult to assess intraoperatively. [28] Furthermore, when using this technique additional scars are made. Thus considering the complexity and length of this procedure microsurgical expertise is required and patients need to undergo a longer period of anesthetics that of course could result in increased risk factors.[ citation needed ] Microsurgical expertise in perforator flap dissection can be acquired using perforator flap training models in living tissue. [29]

Indications and contra-indications

Indications:

Contraindications: [30] [31]

Associated with the patient:

Relative contra-indications

Any condition that probably increases the risk of intraoperative or postoperative complications: [32]

By inducing thrombogenic state through vasoconstriction of the microvasculature, tobacco influences blood flow, wound healing and the survival of pedicled flaps. On the contrary there is no published data on damaging effects of cigarette smoke on free tissue transfer. [33] [34]

Examples of perforator flaps

See also

Related Research Articles

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References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Blondeel PN, Van Landuyt KH, Monstrey SJ, et al. (October 2003). "The "Gent" consensus on perforator flap terminology: preliminary definitions". Plast. Reconstr. Surg. 112 (5): 1378–83, quiz 1383, 1516, discussion 1384–7. doi:10.1097/01.PRS.0000081071.83805.B6. PMID   14504524. S2CID   38395679.
  2. ↑ Morris S (2008). "Perforator flaps: a microsurgical innovation". Medscape J Med. 10 (11): 266. PMC   2605127 . PMID   19099016.
  3. 1 2 Koshima I, Soeda S (November 1989). "Inferior epigastric artery skin flaps without rectus abdominis muscle". Br J Plast Surg. 42 (6): 645–8. doi:10.1016/0007-1226(89)90075-1. PMID   2605399.
  4. ↑ Wei FC, Celik N (July 2003). "Perforator flap entity". Clin Plast Surg. 30 (3): 325–9. doi:10.1016/s0094-1298(03)00033-6. PMID   12916589.
  5. ↑ Granzow JW, Levine JL, Chiu ES, Allen RJ (2006). "Breast reconstruction with the deep inferior epigastric perforator flap: history and an update on current technique". J Plast Reconstr Aesthet Surg. 59 (6): 571–9. doi:10.1016/j.bjps.2006.01.004. PMID   16716950.
  6. ↑ Man LX, Selber JC, Serletti JM (September 2009). "Abdominal wall following free TRAM or DIEP flap reconstruction: a meta-analysis and critical review". Plast. Reconstr. Surg. 124 (3): 752–64. doi:10.1097/PRS.0b013e31818b7533. PMID   19342994. S2CID   26114453.
  7. ↑ Allen RJ, Tucker C (June 1995). "Superior gluteal artery perforator free flap for breast reconstruction". Plast. Reconstr. Surg. 95 (7): 1207–12. doi:10.1097/00006534-199506000-00010. PMID   7761507. S2CID   13358838.
  8. ↑ Kuo YR, Yeh MC, Shih HS, et al. (July 2009). "Versatility of the anterolateral thigh flap with vascularized fascia lata for reconstruction of complex soft-tissue defects: clinical experience and functional assessment of the donor site". Plast. Reconstr. Surg. 124 (1): 171–80. doi:10.1097/PRS.0b013e3181a80594. PMID   19568063. S2CID   5279225.
  9. ↑ Angrigiani C, Grilli D, Siebert J (December 1995). "Latissimus dorsi musculocutaneous flap without muscle". Plast. Reconstr. Surg. 96 (7): 1608–14. doi:10.1097/00006534-199512000-00014. PMID   7480280. S2CID   36267006.
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  15. 1 2 3 Klein S, Hage JJ, de Weerd L (October 2005). "[Perforator flaps--the evolution of a reconstructive surgical technique]". Ned Tijdschr Geneeskd (in Dutch). 149 (43): 2392–8. PMID   16277128.
  16. ↑ Schulten EA, Winters HA, Koch AE (April 2008). "[Reconstruction after surgical treatment of head and neck cancer: surgical and prosthetic possibilities]". Ned Tijdschr Tandheelkd (in Dutch). 115 (4): 215–23. PMID   18512520.
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  18. 1 2 3 Georgescu AV, Capota I, Matei I, et al. (June 2009). "The place of local/regional perforator flaps in complex traumas of the forearm". J Hand Microsurg. 1 (1): 25–31. doi:10.1007/s12593-009-0007-6. PMC   3453204 . PMID   23129928.
  19. ↑ Koshima, Isao; Moriguchi, Takahiko; Etoh, Hisashi; Tsuda, Kuniyoshi; Tanaka, Hitoshi (1995). "The Radial Artery Perforator-based Adipofascial Flap for Dorsal Hand Coverage". Annals of Plastic Surgery. 35 (5): 474–479. doi:10.1097/00000637-199511000-00005. ISSN   0148-7043. PMID   8579264. S2CID   44601964.
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  21. ↑ Auclair E, Guelmi K, Selinger R, Mitz V, Lemerle JP (June 1994). "[Free transfer in the emergency treatment of complex injuries of the arm. Apropos of 18 cases]". Ann Chir Plast Esthet (in French). 39 (3): 338–45. PMID   7717669.
  22. ↑ Rad AN, Christy MR, Rodriguez ED, Brazio P, Rosson GD (February 2010). "The anterior tibialis artery perforator (ATAP) flap for traumatic knee and patella defects: clinical cases and anatomic study". Ann Plast Surg. 64 (2): 210–6. doi:10.1097/SAP.0b013e3181a13dd6. PMID   20098108. S2CID   29990851.
  23. ↑ Quaba O, Quaba A (May 2006). "Pedicled Perforator Flaps for the Lower Limb". Semin Plast Surg. 20 (2): 103–111. doi:10.1055/s-2006-941717. PMC   2884776 .
  24. 1 2 3 LoTempio MM, Allen RJ (August 2010). "Breast reconstruction with SGAP and IGAP flaps". Plast. Reconstr. Surg. 126 (2): 393–401. doi:10.1097/PRS.0b013e3181de236a. PMID   20679825. S2CID   20950415.
  25. 1 2 Guerra AB, Lyons GD, Dupin CL, Metzinger SE (July 2005). "Advantages of perforator flaps in reconstruction of complex defects of the head and neck". Ear Nose Throat J. 84 (7): 441–7. doi: 10.1177/014556130508400717 . PMID   16813036.
  26. 1 2 Granzow JW, Levine JL, Chiu ES, Allen RJ (November 2006). "Breast reconstruction using perforator flaps". J Surg Oncol. 94 (6): 441–54. doi:10.1002/jso.20481. PMID   17061279. S2CID   24974920.
  27. ↑ Neligan PC, Lipa JE (May 2006). "Perforator Flaps in Head and Neck Reconstruction". Semin Plast Surg. 20 (2): 56–63. doi:10.1055/s-2006-941711. PMC   2884771 .
  28. ↑ Liu DZ, Mathes DW, Zenn MR, Neligan PC (July 2011). "The application of indocyanine green fluorescence angiography in plastic surgery". J Reconstr Microsurg. 27 (6): 355–64. doi:10.1055/s-0031-1281515. PMID   21717392. S2CID   260193952.
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  30. ↑ Moran SL, Illig KA, Green RM, Serletti JM (March 2002). "Free-tissue transfer in patients with peripheral vascular disease: a 10-year experience". Plast. Reconstr. Surg. 109 (3): 999–1006. doi:10.1097/00006534-200203000-00031. PMID   11884824. S2CID   41801050.
  31. ↑ Moran SL, Salgado CJ, Serletti JM (June 2004). "Free tissue transfer in patients with renal disease". Plast. Reconstr. Surg. 113 (7): 2006–11. doi:10.1097/01.prs.0000122214.55090.16. PMID   15253190. S2CID   9975910.
  32. ↑ Principles of Microsurgery at eMedicine
  33. ↑ Chang LD, Buncke G, Slezak S, Buncke HJ (October 1996). "Cigarette smoking, plastic surgery, and microsurgery". J Reconstr Microsurg. 12 (7): 467–74. doi:10.1055/s-2007-1006620. PMID   8905547. S2CID   38357412.
  34. ↑ Yaffe B, Cushin BJ, Strauch B (1984). "Effect of cigarette smoking on experimental microvascular anastomoses". Microsurgery. 5 (2): 70–2. doi:10.1002/micr.1920050203. PMID   6748936. S2CID   10008050.
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