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Contents
Part I Introduction to Reconstructive Microsurgery
1 Microsurgery Essentials: Preconditions, Instrumentation, and Setup . . . . . . . . . 3
Alberto Ballestín and Sandra Shurey
2 Basic and Advanced Microvascular Anastomotic Techniques . . . . . . . . . . . . . . . . 11
Alberto Ballestín and Yelena Akelina
3 Decision-Making in Flap Surgery: Reconstructive Ladder Versus Elevator . . . . 19
Mohammed Farid, Thessa Friebel, and Dariush Nikkhah
4 Assessment of Flap Perfusion: Microvascular Flowmetry . . . . . . . . . . . . . . . . . . . 25
Joshua Luck
5 Re-exploration, Complications and Flap Salvage . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Paul Caine, Johann A. Jeevaratnam, Adam Misky, and Dariush Nikkhah
6 The Use of Ultrasound Technology in Planning Perforator Flaps
and Lymphatic Surgery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Giuseppe Visconti, Alessandro Bianchi, Akitatsu Hayashi, and Marzia Salgarello
7 Novel Microscopic Technologies in Reconstructive
Microsurgery/Microvascular Surgery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Michalis Hadjiandreou and Georgios Patanis
8 Robotic Microvascular and Free Flap Surgery: Overview of Current Robotic
Applications and Introduction of a Dedicated Robot for Microsurgery . . . . . . . . 77
Joost A. G. N. Wolfs, Rutger M. Schols, and Tom J. M. van Mulken
9 Technical Tips in Microvascular Surgery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Marios Nicolaides and Georgios Patanis
Part II Core Flaps
10 Temporal Artery Flaps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Oliver J. Smith, Greg O’Toole, and Walid Sabbagh
11 Supraorbital and Supratrochlear Artery Flaps - Forehead
Flap and Modifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Daniel B. Saleh and Alex Dearden
12 Cervicofacial Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Luke Geoghegan, Dariush Nikkhah, and Tiew Chong Teo
13 Bowel Flaps - Jejunum Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Georgios Patanis, Shin-Heng Chen, and Hung-Chi Chen
xiii
xiv
14 Thoracodorsal Artery Flap: Latissimus Dorsi Flap . . . . . . . . . . . . . . . . . . . . . . . . 133
Mohammed Farid, Dariush Nikkhah, and Jeremy Rawlins
15 Thoracodorsal Artery Perforator Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Youn Hwan Kim and Lan Sook Chang
16 The Scapular Axis Flaps: An Expendable Direct Cutaneous Perforator
with Many Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Daniel Saleh and John Henton
17 Thoracoacromial Artery Flap: Pectoralis Major Muscle Flap . . . . . . . . . . . . . . . . 171
Jonathan A. Dunne, Ian C. C. King, Dariush Nikkhah, and Jeremy Rawlins
18 Transverse Cervical Artery Flap - Supraclavicular Flap . . . . . . . . . . . . . . . . . . . . 181
Pedro Ciudad, Juste Kaciulyte, Georgios Patanis, and Hung-Chi Chen
19 Inferior Epigastric Artery Flap: Deep Inferior Epigastric Artery
Perforator Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Alexandra O’Neill, Dariush Nikkhah, Ahmed M. Yassin, and Bernard Luczak
20 Inferior and Superior Epigastric Artery Flaps:
The Rectus Abdominis Muscle Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Matthew Wordsworth, Dariush Nikkhah, Alex Woollard, and Norbert Kang
21 Superficial Inferior Epigastric Artery and Superficial Circumflex
Iliac Artery Perforator Combined Flaps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
Hidehiko Yoshimatsu, Yuma Fuse, Ryo Karakawa, and Akitatsu Hayashi
Contents
22 Superior Gluteal Artery Perforator Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Mohammed Farid and Mohamed Shibu
23 Inferior Gluteal Artery Perforator Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Maleeha Mughal and Paul Roblin
24 The Lumbar Artery Perforator Flap: A True Alternative
in Autologous Breast Reconstruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Filip B. J. L. Stillaert, Phillip Blondeel, and Koenraad Van Landuyt
25 Right Gastroepiploic Artery: Omental Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Vladimir Anikin and Katherine de Rome
26 Dorsal Metacarpal Artery Flaps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
Prateush Singh, Andreas Georgiou, Julia Ruston, and Dariush Nikkhah
27 Digital Artery Flaps: Homodigital and Heterodigital Island Flaps . . . . . . . . . . . . 259
Sirke Rinkoff, Julia Ruston, and Dariush Nikkhah
28 Radial Forearm Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271
Shahriar Raj Zaman, Qadir Khan, Jeremy M. Rawlins, Allan Ponniah, and Dariush Nikkhah
29 Posterior Interosseous Artery Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281
Douglas Copson, Dariush Nikkhah, and Mark Pickford
30 Venous Flaps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
Christopher Deutsch and Jamil Moledina
31 Free Thenar Flap. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297
Dimitris Reissis, Petr Vondra, and Zheng Yumao
Contents
xv
32 Medial and Lateral Arm Fasciocutaneous Flaps . . . . . . . . . . . . . . . . . . . . . . . . . . .305
Katerina Kyprianou, Georgios Patanis, Dajiang Song, and Youmao Zhen
33 The Groin Flap: The Workhorse Flap for Upper Limb Reconstruction . . . . . . . . 313
Hari Venkatramani, David Zargaran, Dariush Nikkhah, Julia Ruston, and S. Raja Sabapathy
34 Superficial Circumflex Iliac Artery Perforator Flap: A Thin
and Versatile Option for Limb and Head and Neck Reconstruction . . . . . . . . . . . 325
Juan Enrique Berner, Dariush Nikkhah, and Tiew Chong Teo
35 Lateral Circumflex Femoral Artery—Anterolateral Thigh Flap:
Anterolateral Thigh Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333
Robert Miller, Dariush Nikkhah, Edmund Fitzgerald O’Connor, and Jeremy Rawlins
36 Transverse Upper Gracilis (TUG) Flap: A Reliable Alternative
for Breast Reconstruction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .343
Juan Enrique Berner and Adam Blackburn
37 Medial Circumflex Femoral Artery: Gracilis Muscle Flap . . . . . . . . . . . . . . . . . . . 353
Robert Miller, Dariush Nikkhah, and Graeme Glass
38 Profunda Artery Perforator Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 365
Tomoyuki Yano
39 Medial Femoral Condyle Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373
Anthony L. Logli and Alexander Y. Shin
40 Medial Sural Artery Perforator Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 385
Dimitris Reissis, Dariush Nikkhah, Bernard Luczak, and Georgios Orfaniotis
41 Peroneal Artery Flaps: The Free Fibula Flap. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 397
Amitabh Thacoor, Daniel Butler, Dariush Nikkhah, and Jeremy Rawlins
42 Posterior Tibial and Peroneal Perforators Flaps . . . . . . . . . . . . . . . . . . . . . . . . . . . 409
Ahmed M. Yassin, Muholan Kanapathy, and Georgios Patanis
43 Second Toe Free Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 419
Dariush Nikkhah, Juan Enrique Berner, Petr Vondra, Bran Sivakumar, and Mark Pickford
44 Great Toe Flaps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 429
Dariush Nikkhah and Norbert Kang
45 The Medial Plantar Flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 443
Alexander E. J. Trevatt, Miguel A. Johnson, and Tiew C. Teo
Part III Common Recipient Vessels
46 Chest Wall Recipient Vessels Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 455
Pennylouise Hever, Dariush Nikkhah, Alexandra Molina, and Martin Jones
47 Head and Neck Recipient Vessels Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 465
Alexandra O’Neill, Juan Enrique Berner, and Georgios Patanis
48 Upper Limb Recipient Vessels Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .473
Zhi Yang Ng, Calum Honeyman, Amir Sadr, and Dariush Nikkhah
xvi
49 Lower Limb Recipient Vessels Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 481
Yezen Sheena, Georgios Patanis, Dariush Nikkhah, Edmund Fitzgerald O’Connor, and Jeremy Rawlins
50 Lymphatic Supermicrosurgery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 489
Takumi Yamamoto and Nana Yamamoto
Part IV Appendix
51 Cadaveric Anatomy: Microvascular Flaps Dissection . . . . . . . . . . . . . . . . . . . . . . . 499
Georgios Patanis, Dajiang Song, and Youmao Zheng
Contents
List of Videos
Video 5.1 Hyperaemia in the immediate post-operative period following great toe to hand
transfer Video 5.2 Demonstration of a congested gracilis ap in a lower limb ap reconstruction Video 14.1 This video narrated by Dr Dariush Nikkhah demonstrates the elevation of a Free
LD ap for extremity reconstruction Video 19.1 Narrated video demonstrating tips and tricks on DIEP ap elevation, recipient ves-
sel preparation, microsurgery (arterial anastomosis and Venous anastomosis with
Vein coupler) and inset. Case performed and narrated by Dariush Nikkhah Video 22.1 SGAP ap elevation, demonstrating good capillary rell and pulsating perforator.
Flap is rotated into perineum Video 22.2 SGAP ap de epitheliasation before transfer as a propeller ap to obliterate dead
space in perineum Video 29.1 Identication of ECU/EDM septum by exion and extension of the little nger
during PIA ap harvest Video 29.2 Large SCC of the right thumb necessitating amputation and coverage with a
reverse PIA ap Video 34.1 SCIP ap raising technique demonstration (Part 1) Video 34.2 SCIP ap raising technique demonstration (part 2) Video 35.1 A demonstration of the de-roong technique in ALT ap harvest Video 35.2 Post operative outcome for upper limb defect reconstruction with an ALT ap Video 35.3 This video narrated by Dr Dariush Nikkhah demonstrated an overview of the ALT
ap raise Video 37.1 This video demonstrates the post-operative outcome from a free functional gracilis
muscle transfer for elbow reanimation after a brachial plexus injury Video 41.1 Demonstration of an osteotomy of a bula ap whilst protecting the underlying
pedicle with a malleable retractor Video 41.2 Narrated video by Dr Dariush Nikkhah demonstrating steps in raising a osteocu-
taneous free bula ap to reconstruct the mandible in a patient with a large odon-
togenic myxoma Video 43.1 This narrated video by Dr. Dariush Nikkhah, Juan Berner and TC Teo demon-
strates a second toe to hand transfer for thumb reconstruction Video 44.1 Demonstration of dexterity after the great toe transfer by passing a coin between
the reconstructed thumb and opposing digits Video 44.2 Demonstration of circumduction of the great toe transfer Video 49.1 Preoperative markings in planning a free ap reconstruction of the right lateral
ankle. The surgeon is planning extension along the fasciotomy lines to access the
anterior tibial vessels
xvii
Part I
Introduction to Reconstructive Microsurgery
Microsurgery Essentials: Preconditions, Instrumentation, andSetup
AlbertoBallestín andSandraShurey
1
1.1 Introduction
Reconstructive microsurgery is the surgical technique that uses the optical magnication of a microscope, the precision of specic instruments, and the accuracy of small sutures (8/0 to 13/0) to achieve ne dissections and free tissue trans­fers by performing vascular and nerve anastomoses of small diameter. Although nowadays microsurgery is a fundamental part of reconstructive surgery, it has a relatively short but intense history.
The development of reconstructive microsurgery was pri­marily inuenced by advances in vascular surgery. The main vascular anastomosis techniques were not described until the beginning of the twentieth century until the experimental work of Carrel and Guthrie [1]. Later, in 1921, the micro­scope was introduced for the rst time in surgery by the oto­laryngologist Nylen [2]. Then, the progressive improvement of microscopes, together with the synthesis of anticoagulants and antibiotics, laid the necessary foundations for surgeons Julius H.Jacobson and Ernesto L.Suárez to perform the rst vascular anastomoses in vessels of 1 mm diameter in the 1960s [3]. Subsequently, rst successes were obtained in replantation of severed body parts during the following years [4]. During that period, Harry J.Buncke and other pioneers carried out innovative studies on replantation and tissue transplants in animals, developing many of the basic princi­ples of this discipline [5]. After years of research, the rst free tissue transfer was performed on a patient in 1972 [6]. Since then, a multitude of designs and techniques have been described for performing free tissue transfers and microsur­gical repairs which are used in countless procedures: replan­tation, transplantation, neurosurgery, limb reconstruction,
A. Ballestín (*) Tumor Microenvironment Laboratory, Institut Curie, Paris, France
S. Shurey MicroShure Ltd, Brixham, England, UK
head and neck surgery, breast reconstruction, peripheral nerve surgery, lymphedema, etc.
Microsurgery has ostensibly improved the treatment of patients affected by a wide range of tissue defects. In this book chapter, we rst describe the necessary materials for microsurgery, such as specic instruments, optical magni­cation, and sutures. Then, we detail the microsuture tech­niques, the main formal training programs, and some different microsurgical setups.
1.2 Surgical Magnication: Loupes
andMicroscopes
Microscopy is an integral part of reconstructive surgery but also of many other surgical disciplines nowadays. Otolaryngology was the rst discipline to incorporate the microscope into its surgeries [2], ophthalmology added illu­mination [7], and neurosurgery allowed the use of infrared and other wavelength cameras to use contrast-enhancing techniques for specic anatomical structure visualization [8]. The technical evolution of surgical microscopy over decades has been impressive and very useful for surgeons. The microscopic magnication of the surgical eld improves visual acuity and enhances precise treatments. Small ana­tomical details are appreciated allowing the performance of ne dissections and microsuture techniques in a precise and easier way nowadays.
In reconstructive surgery, a surgeon’s rst introduction to magnication is usually with the use of surgical loupes. Magnifying loupes are tremendously useful for dissections that do not require great magnication capacity but require working in large or distant surgical approaches. However, when high magnication is required to perform microsurgery, the use of a microscope is essential, as loupes typically have
2.5–5× magnication, while microscopes provide 2–40× magnication. In addition, the ergonomic improvements of microscopes, the variation of the magnication and its high-
© Springer Nature Switzerland AG 2023 D. Nikkhah et al. (eds.), Core Techniques in Flap Reconstructive Microsurgery, https://doi.org/10.1007/978-3-031-07678-7_1
3
4
A. Ballestín and S. Shurey
quality visualization, allow the performance of procedures with high precision that are not possible to perform with sur­gical loupes. However, surgical loupes are portable, easy to use, and cost-effective compared to surgical microscopes [9].
1.2.1 Surgical Loupes
Surgical loupes are very useful when high magnication is not required but an improvement in technical precision is needed. Three different optical systems can be used for its manufac­ture: simple, compound (Galilean), and prismatic [10].
• Simple loupes consist of a single meniscus lens; they are not currently marketed by almost any company since the other two systems are better.
• Compound (Galilean) loupe systems are the most com­mon; they are made up of two magnifying lenses sepa­rated from each other. Compared to the simple system, the Galilean system offers greater magnication, greater depth of view, and longer working distances.
• Prismatic loupes consist of a more complex optical sys­tem that provide higher magnication and typically lon­ger working distances than simple and compound loupes. However, its weight is greater, as well as its cost.
Regarding the placement of the loupes on the glasses,
there are two types of designs: through-the-lens (TTL) and ip-up loupes (Fig. 1.1). They are different; the choice of surgical loupes should be based on personal preferences pri­oritizing surgical-specic needs. Both designs have advan­tages and disadvantages when compared.
• TTL: It is a custom design of loupes, which are mounted through the lens of the glasses depending on the user’s specic interpupillary distance. The loupes are posi-
tioned at a steep declination angle to the eyeglass lenses to allow the user to achieve an ergonomic posture during surgery.
• Flip-up loupes: It is a foldable design of loupes that have the optics attached to a hinge mechanism. This system allows magnifying lenses to be moved out or in to work with or without magnication. They are cheaper than TTL, and usually interpupillary variation is possible; therefore they can be used by surgeons with different interpupillary distances. However, TTL loupes offer a wider eld of view than ip-up loupes, because lenses are closer to the user’s eyes, which means that users can see a larger area of surgical eld than with the same magnica­tion with ip-up loupes.
Loupes are usually available with a xed magnication
between 2.5× and 5×, although there are some allowing more magnication. However, for all optical systems, the higher the magnication of the loupes, the greater their weight, the smaller the eld of view, and the narrower the depth of focus becomes.
It is also possible to use a light source with surgical
loupes. Usually the light source is connected by cable to a battery that can be carried in surgeon’s pocket, but there are also rechargeable or battery-powered models that have the batteries in the temple of the glasses.
Loupes offer exibility, portability, and lower cost
compared to microscopes. However, they offer lower magnication power and do not have coaxial illumination, and surgeon’s ergonomics are much poorer. The working distance of surgical loupes is xed; therefore, surgeon must nd a correct position to obtain a focused view. This can lead to improper body positions causing neck and back fatigue and even leading to musculoskeletal injuries.
abc
Fig. 1.1 Different types of surgical loupes. (a) Through-the-lens Galilean loupes (2.5×). (b) Through-the-lens variable magnication loupes (2.5×–3.5×–4.5×). (c) Flip-up Galilean loupes (2.5×). (Images courtesy of Optimedic)
1 Microsurgery Essentials: Preconditions, Instrumentation, andSetup
1.2.2 Surgical Microscope
Surgical microscopes allow for stereoscopic vision and therefore for in-depth orientation. This, in turn, allows safe and precise use of instruments and improves ergonomics, since it can be operated while maintaining an upright posi­tion, preventing fatigue and postural alterations that could lead to muscle strain or injury.
To use surgical instruments on the patient using a micro­scope, a certain distance is required between the surgical approach and the main lens of the microscope. This space is called the working distance. In reconstructive microsurgery, the working distance is generally between 200 and 400mm and must be adapted in each situation regarding the surgeon to maintain a correct working posture.
The magnication factor of a microscope is variable and allows varying between 1.5× and 30× magnications. Microscopes permit modifying the magnication/zoom dur­ing surgery, maintaining the focal length while having a relaxed posture for the surgeon.
Microscopes also allow variation of the working distance, allowing to evaluate different anatomical planes with good focus and high image quality. Thus, it makes the surgeon work in a comfortable way.
Today the surgical microscope (Fig.1.2) is indispensable in reconstructive surgery. Its main parts are:
• Binocular tubes. They are mobile to adapt the interpupil-
lary distance of the surgeon. It is also possible to regulate
the diopters; for this, it is recommended that each eye bin-
ocular is individually focused to achieve maximum visual
acuity.
• To facilitate ergonomics, usually 180° tiltable binocular
tubes are used; also it can be turned about its optical
axis. The wideeld eyepieces usually have 10× or 12.5×
providing magnication. Usually there are two binocu-
lars, allowing face-to-face surgery by two surgeons.
The mounting of three or four binoculars is also possi-
ble in some microscopes if further assistance was
needed.
• Variation system. Progressive zoom allows going from
low to high magnication during surgery.
• Lens of the main objective. It largely denes the image
quality, and its positioning usually sets the focal length
ranging from 100 to 400mm.
5
Fig. 1.2 Surgical microscope. (Courtesy of Leica)
• Coaxial eld lighting, which usually is halogen or xenon light.
• Camera to record procedures and take images to follow up surgeries.
• Some models have an infrared camera that allows, through the use of contrasts such as ICG (Indocyanine Green), to evaluate the lymphatic system or to perform intraopera­tive angiography.
• Pedal. It allows movement in XY without manipulating the stand with the hands; it also allows ordering the taking of images or video, as well as launching programs for evaluation with an infrared camera.
1.2.3 Heads-Up 3D Microscopy
andExoscopes
New 3D heads-up microscopes (Fig.1.3) have made it possible to improve the comfort of the microsurgeon since they allow to operate sitting or standing with the head up, without compro­mising the quality of the image or the technical accuracy [11].
Although its use has been anecdotal, exoscopes provide
a high-denition image of the eld from a digital camera system projected onto a 2D or 3D high-resolution monitor [12, 13].
6
Fig. 1.4 Microsurgery instrument set. (Courtesy of Mercian)
A. Ballestín and S. Shurey
since precision is reduced. Angled microsurgical forceps can also be used as needle holders to handle very small sutures as they are less bulky and allow ne handling.
Microsurgical forceps no. 3 and 5 are essential in any microsurgical instrument set. Their tips should evenly coin­cide over a length of 2mm so that the 10/0 and 11/0 nylon thread can be easily collected without damaging it. These microforceps can be straight, angled, or curved.
Fig. 1.3 3D heads-up microscopes. (Courtesy of Mitaka)
1.3 Microsurgical Equipment, Instruments, andSutures
Specic and high-quality instruments are key to the perfor­mance and precision of microsurgical techniques. Each instrument should have a satin nish to avoid glare under the microscope and should be long enough to rest properly in the surgeon’s hands. Some instruments are spring-loaded; on these instruments the closing tension should be gentle enough to avoid fatigue.
A set of microsurgical instruments (Fig.1.4) should con­tain microneedle holder, straight and curved Dumont for­ceps, vasodilator forceps, microscissors, clamps, microvascular clamp applicator, and sutures.
Needle holders usually have spring-loaded handles that can have a round or at grip. The ne tips can be curved, angled, or straight. The tip should be ne enough to hold the needle without distorting its curve during use. Needle holders with lock ratchets should not be used because the release of the lock makes impossible to control the movement; therefore, it can be a problem when working with high magnication
Vasodilator forceps are modied forceps, and at the tip they are rounded and polished, so they can be inserted into the end of a cut vessel, and through their gentle opening, coun­terpressure is provided while suturing. Furthermore, vasodi­lation prior to the anastomosis performance can facilitate the procedure.
Microscissors should have a spring handle, and curved or
straight blades can be short or long depending on personal preference. The tips should be rounded so that the tissues adjacent to the vessels can be dissected without damaging them.
The adventitia scissors are similar, but with straight and sharp blades; they are used to remove the adventitia from the vessels and/or remove the sutures made.
Microvascular clamps are used to block blood ow; depending on the diameter of the vessel, a different clamp must be chosen. Caution must be exercised during use; blood on the clamp joint can render them ineffective.
Clamp applicator forceps are specically designed for the proper handling of microvascular clamps.
Microsurgical sutures must be inert and antithrombogenic. That is why nonabsorbable synthetic monolaments are