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12 Chapter 1/Historical Introduction
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TABLE 1.4 Venous Reconstructive Surgery
The pioneers of venous reconstructive surgery
1816 Travers Sutured a traumatic lesion of the femoral vein 1830 Guthrie Sutured a traumatic lesion of the jugular vein 1872 Eck Porto-caval anastomosis 1878 Agnew Lateral suture of traumatized veins 1889 Kummel First termino-terminal anastomosis of the femoral vein 1901 Clermont First termino-terminal anastomosis of the inferior vena cava 1912 Carrel & Guthrie Nobel prize for improvements of vascular surgery techniques
Main steps in venous reconstructive surgery
1950 Wanke Surgical decompression of the left common iliac vein 1953 Kunlin Veno-venous grafting 1954 Warren & Thayer Great Saphenous Vein bypass of obstructed femoral veins 1958 Palma & Esperon Cross-pubic bypass for iliac vein occlusion 1964 Stansel Synthetic graft for caval reconstruction 1970 Husni Sapheno-popliteal bypass for femoral venous obstruction 1982 Fiore Reconstruction with prosthetic grafts of superior vena cava 1984 Gloviczki; Dale Reconstruction with prosthetic grafts of inferior vena cava 1988 Zolliker Endovascular disobliteration and stenting
fi lter. One year later, Eichelter and Schenk proposed a tem­porary caval fi ltration with a removable balloon.
In order to control symptoms of venous insuffi ciency, Parona suggested in 1894 to ligate the popliteal vein, whereas Linton suggested in 1948 to interrupt the femoral vein.
Fundamentals of reconstructive venous surgery were experienced during the nineteenth century, and in 1912, Carrel and Guthrie received the Nobel Prize for the improve­ments they gave to vascular surgery techniques. However, safe and effective venous interventions for venous obstruc­tions of the trunk and limbs developed only after World War II (see Table 1.4).
THROMBECTOMY
vein in a patient with phlegmasia coerulea dolens. In 1966, Fogarthy described how to remove vascular obstruction by a catheter and affi rmed this is the “most rationale, most effective and safest way of dealing with iliofemoral thrombosis.”
SURGERY OF VALVES
The fi rst attempt to restore valvular function was per­formed in 1953 by Eisemann and Malette, who proposed to produce valve-like structures by gathering folds at two sites of the venous wall opposite each other. In 1963, Psathakis proposed to entwine the tendon of the gracilis muscle between the popliteal artery and vein in order to obtain the compression of the vein during contraction of the muscle. A few years later, Ferris and Kistner proposed a transvalvular approach for internal repair of venous valve (1968). In 1984, Raju modifi ed this technique by using a supravalvular approach. Finally, Sottiurai (1988) proposed an internal approach, modifying the original technique of Raju for supravalvular repair of the incompetent venous valves. In 1972, Hallberg proposed the external banding of the incom­petent valves of deep veins by sheathing the region with a plastic tube. An extravenous valve substitute in the popliteal space was described by Psathakis in 1984. In 1982, Taheri proposed to transfer a valvulated segment of the axillary vein into the lower femoral vein to treat chronic venous insuffi ciency. In 1986, Jessup and Lane developed an exter­nal technique of banding incompetent valves with a silastic cuff. One year later, Kistner developed an external suture technique to “band” incompetent valves.
Reparative or substitutive surgery of venous valves improved greatly in the last years. In 1999, Dalsing intro­duced the use of cryopreserved venous valve allografts for the treatment of chronic deep venous insuffi ciency.15 One year later, Raju, Berry, and Neglen16 described a variation of closed external venous valve repair (transcommissural valvuloplasty). In 2001, Tripathy and Ktenidis reported a new technique of exposure of the valve commissure, called the “trapdoor” internal valvuloplasty. experimented with small-intestinal submucosa square-stent bicuspid venous valve in sheep jugular veins and in three patients. In the same year, Corcos18 proposed a monocuspid valve reconstruction obtained with an intimal fl ap.
17
In 2003, Pavcnik
Paré is probably the fi rst to perform a superfi cial vein thrombectomy in 1545: he suggested performing an incision along the vein and squeezing it to expel the thrombus. The fi rst thrombectomy of deep veins was performed by Lawen in 1937. In 1939, Leriche and Geisendorf associated a peri­arterial sympathectomy of the nonpulsatile but unoccluded femoral artery to a successful thrombectomy of the femoral
VENOUS ULCERS—WHY TO
TREAT THEM
Ulcers of venous origins were discriminated by Spender (1866) in “varicose ulcers” and “venous ulcers” (“. . . ulcers of the varicose type without varicose veins . . .”), attributing the latter to failure of deep veins. One year later, John Gay
Ulcer Therapy 13
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fi rst associated induration and bronzing of the skin as circu­latory complications of venous disorders, and, having noted that varicose veins can be present for many years without any ulcer or bronzing of the skin, affi rmed that “. . . ulcer­ation is not a direct consequence of varicosity, but all of other conditions of the venous system with which varicosity is not infrequently a complication . . .” Gay’s intuitions were already been explained by Fabricius (1603), who affi rmed that varicose veins carry “fecaloid humours” that cause skin damage. The “bad humours” could be the hemosiderin that spreads from the capillary bed into the interstitium,19 or other substances that produce a pericapillary fi brin cuff, poorly permeable to gases20 or induce leukocyte trapping, migration, and release of cytotoxic substances.
21
And Why Not to Heal Them
Only few authors devoted to the Pythagorean theory of the four humours suggested not to heal ulcers because they are considered as benefi cial in expelling dangerous sub­stances. Galen of Pergamum (130–200 ad) believed that black bile would be trapped by a healing ulcer. Thus, black bile could leak outside while the ulcer remains unhealed. If the ulcer heals, madness and other disasters would follow. Avicenna even warned to reopen varicose ulcers if these spontaneously closed. In modern times, among those reluc­tant to treat ulcers were Lorenz Heister (1718) and Henry Françoise Le Dran (1731). Both of them considered the ulcer to be a drain for humors that caused severe illness if not expelled. Laufman stated: “. . . A number of British sur­geons took up the same cry in the eighteenth century and even into the nineteenth century(!!) . . .”
ULCER THERAPY
Modern ulcer therapy is based on 1) topical medications;
2) compressive bandage; and 3) surgery of related veins. The same was true more than two thousand years ago.
In fact, since many centuries bc ago, venous ulcers are treated by topical applications of substances (like the fi g pultice used by the Prophet Isaiah), associated to bandages (Celsus) and local hygienic treatments (Hippocrates). Prin­ciples of local treatments were meticulously described in 1446 by an anonymous surgical textbook (quoted by Partsch,
2002), which treated extensively (9000 words) the treatment of leg ulcers. Four steps are reported: 1) enlargement of the ulcer mouth, to obtain drainage; 2) mortifi cation (debride- ment); 3) mundifi cation (cleansing); 4) fl eshing (production of granulation tissue).
Ulcer therapies based only upon topical remedies were strongly criticized in 1797 by Everard Home: “. . . It must appear obvious, that there is no probability that any one
TABLE 1.5 Walking or Bed Rest to Heal Ulcers?
1778 Benjamin Bell Absolute bed rest 1783 Michel Underwood Immediate mobilization 1793 John Hunter Bed rest 1797 Thomas Baynton Walking 1799 Whately . . . to walk with no scruples . . .” 1861 Hilton Bed rest 1886 Dechambre Walking
medicine can ever be discovered which, whether internally administered or locally applied, shall have powers adapted to the cure of all ulcer on the legs; and it would appear, the idea that such a medicine may exist, has retarded very con­siderably, the advancement of our knowledge in the treat­ment of ulcers . . .” In addition, Brodie (1846) warned against the frequent occurrence of cutaneous sensitization due to drugs and other remedies used topically to treat ulcers.
The importance of associating bandages to local treat­ment of ulcers was well known since Hippocrates and in 1676, the Englishman Richard Wiseman warned that venous ulcers healed by compression usually recur once the com­pression is discontinued. In 1771 Else tried to determine what compression therapy would do in old ulcers of the leg, without administering any internal medicine, and found it so exceedingly effi cacious that he believed it will seldom fail where there is no carious bone. It has been discussed at length, whether bandaged patients must walk or if it is better that they rest on the bed (see Table 1.5). Besides clinical argumentations, ambulatory treatment of venous ulcers was justifi ed by the analysis of the costs of hospitalization reported by Underwood in 1783 and by Philip Boyers in
1831.
Besides topical treatments, surgery of the varicose veins, when present, has been recommended since old times. Hyeronimus Fabricius of Acquapendente (1603) suggested to associate compression to double ligation and division of the varix above the ulcer. In turn, John Gay (1867) randomly divided all the veins around the ulcers by several incisions. It was only one century later, that selective interruption of perforating veins below the ulcer was emphasized by Franck Cockett. Currently, sclerotheraphy is used to obliterate peri­ulcerative varicose veins. Nevertheless, the fi rst to perform an endovenous treatment of ulcers was Sigismond Johann Elsholz in 1665, using a chicken bone as a needle and a bladder of pigeon as a syringe.
At any case, it was suggested to invoke a “divine factor” to heal ulcers (Fabricius, 1603). On the contrary, the Roman physician Asclepiade believed that ulcer healing needs “. . . delicate massages from sweet maiden or boy, according with own preferences . . .”
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TABLE 1.6 Presidents of the IUP
Erich Krieg 1959–1970 Henrik Van Der Molen 1971–1983 Jean Van Der Stricht 1983–1989 André Davy 1989–1995 Georges Jantet 1995–1999 Hugo Partsch 1999–2003 Claudio Allegra 2003–2007 Eberhard Rabe (elect) 2007–2012
ADDENDA: THE INTERNATIONAL
UNION OF PHLEBOLOGY (IUP)
It was on March 24, 1959, at the Château de Meyrargues in France near Aix-en-Provence, at the close of a joint meeting of the responsible representatives of the four exist­ing Societies of Phlebology (the French Society of Phle­bology created in 1947, the Benelux Society of Phlebology created in 1957, the German Society of Phlebology created in 1958, and the Italian Society of Phlebology, which came into being at the same time) that the foundations of an Inter­national Union of Phlebology were laid. Those responsible were, Tournay and Wallois (France), van der Molen (Benelux), Krieg (Germany), and Bassi and Comel (Italy). Actually, the IUP includes the phlebological societies of more than 40 countries (see Table 1.6).
References
1. Lurie F, Kistner RL, Eklof B, Kessler D. Mechanism of venous valve
closure and role of the valve in circulation: A new concept, J Vasc Surg. 2003. 38: 955–961.
2. Ono T, Bergan JJ, Schmid-Schonbein GW, Takase S. Monocyte infi l-
tration into venous valves, J Vasc Surg. 1998. 27: 158–166.
3. Caggiati A, Luccichenti G, Pavone P. Three-dimensional phle-
bography of the saphenous venous system, Circulation. 2000. 102: E33–35.
1
Chronology of main innovations in the fi eld of venous medicine and surgery occurred during the last decades derived mainly by a PubMed investigation.
1
4. Uhl JF, Verdeille S, Martin-Bouyer Y. Three-dimensional spiral CT venography for the pre-operative assessment of varicose patients, Vasa. 2003. 32: 91–94.
5. Ruehm SG, Zimny K, Debatin JF. Direct contrast-enhanced 3D MR venography, Eur Radiol. 2001. 11: 102–112.
6. Szendro G, Nicolaides AN, Zukowski AJ, Christopoulos D, Malouf GM, Christodolou C, Myers K. Duplex scanning in the assessment of deep venous incompetence, J Vasc Surg. 1986. 4: 237–242.
7. Luizy F, Franceschi C, Franco G. A method of venous study by real time ultrasonography associated with directional and continuous Doppler ultrasonography, Ann Med Interne (Paris). 1986. 137: 484–487.
8. Partsch H, Rabe E, Stemmer R. Compression therapy of the extremi­ties, Editions Phlebologiques Francais, Paris. 2002.
9. Ricci S, Georgiev M, Goldman MP. Ambulatory phlebectomy. Mosby St Louis. 1995.
10. Corcos L, De Anna D, Zamboni P, Gasbarro V, Bresaola V, Procacci T, Liboni A, Macchi C, Donini I. Reparative surgery of valves in the treatment of superfi cial venous insuffi ciency. External banding valvu­loplasty versus high ligation or disconnection. A prospective multicen­tric trial, J Mal Vasc. 1997. 22: 128–136.
11. Yamaki T, Nozaki M, Sasaki K. Alternative greater saphenous vein­sparing surgery: Valvuloplasty combined with axial transposition of a competent tributary vein for the treatment of primary valvular incom­petence, 18-month follow-up, Dermatol Surg. 2002. 28: 162–167.
12. Mozes G, Gloviczki P, Menawar SS, Fisher DR, Carmichael SW, Kadar A. Surgical anatomy for endoscopic subfascial division of per­forating veins, J Vasc Surg. 1996. 24: 800–808.
13. Labropoulos N, Mansour MA, Kang SS, Gloviczki P, Baker WH. New insights into perforator vein incompetence, Eur J Vasc Endovasc Surg.
1999. 18: 228–234.
14. van Neer PA, Veraart JC, Neumann HA. Venae perforantes: A clinical review, Dermatol Surg. 2003. 29: 931–942.
15. Dalsing MC, Raju S, Wakefi eld TW, Taheri S. A multicenter, phase I evaluation of cryopreserved venous valve allografts for the treatment of chronic deep venous insuffi ciency, J Vasc Surg. 1999. 30: 854–864.
16. Raju S, Berry MA, Neglen P. Transcommissural valvuloplasty: Tech­nique and results, J Vasc Surg. 2000. 32: 969–976.
17. Tripathi R, Ktenedis KD. Trapdoor internal valvuloplasty—A new technique for primary deep vein valvular incompetence, Eur J Vasc Endovasc Surg. 2001. 22: 86–89.
18. Corcos L, Peruzzi G, Procacci T, Spina T, Cavina C, De Anna D. A new autologous venous valve by intimal fl ap. One case report. Minerva Cardioangiol. 2003. 51: 395–404.
19. Zamboni P, Izzo M, Fogato L, Carandina S, Zanzara V. Urine hemo­siderin: A novel marker to assess the severity of chronic venous disease, J Vasc Surg. 2003. 37: 132–136.
20. Browse NL, Burnand KG. The cause of venous ulceration, Lancet,
1982. 2(8292): 243–245.
21. Coleridge Smith PD, Thomas P, Scurr JH, Dormandy JA. Causes of venous ulceration: A new hypothesis, Br Med J (Clin Res Ed).
1988. 296: 1726–1727.
CHAPTER
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2
Venous Embryology and Anatomy
GEZA MOZES and PETER GLOVICZKI
INTRODUCTION
Substantial knowledge has accumulated in recent years on development and anatomy of the venous system. Prog­ress in medical genetics resulted in identifi cation of genes linked to development of circulation and in recognition of growth factors affecting normal and abnormal development of blood vessels. Perfection of ultrasound technology com­bined with an increasing clinical interest in venous disease resulted in identifi cation of new compartments and clinically important anatomic structures.1 Finally, a new, clinically relevant anatomic terminology of the veins of the leg and pelvis was introduced.2 In this chapter we discuss the embry­ology of the venous system and present the most frequent venous anomalies. We describe the histology of large veins and present a detailed anatomy of the veins of the trunk and the upper and lower limbs. Discussion of the anatomy of the visceral and cervical veins is beyond the scope of this review. The new terminology of veins will be used in this manu­script (see Table 2.1).
EMBRYOLOGY
During embryogenesis the earliest veins develop from capillary plexuses; these carry blood into the sinus venosus, the in-fl ow end of the forming heart. The right and left common cardinal veins drain directly into the sinus venosus (see Figure 2.1). The common cardinal veins form at the junction of the anterior and posterior cardinal veins on both sides. Between this junction and the heart the common car­dinal veins receive the vitelline and umbilical veins. The vitelline veins initially drain the yolk sac and later the intes-
tines. The right umbilical vein regresses completely, the left drains the placenta.
The anterior cardinal veins drain the cranial part of the embryo and are connected to each other by a large central anastomosing channel. The segment of the left anterior car­dinal vein located proximal to the anastomosis will regress. The oblique vein of the left atrium and the coronary sinus develop from the regressed proximal segment of the left anterior cardinal vein. The remaining distal segment becomes the left internal jugular vein and the anastomosis between the anterior cardinal veins forms the left brachiocephalic vein. The right internal jugular and brachiocephalic veins develop from the proximal segment of the right anterior cardinal vein. The external jugular veins develop second­arily. Failure of the regression of the proximal left anterior cardinal vein results in double superior vena cava (SVC), whereas erroneous regression on the right side results in left-sided SVC (see Figure 2.2a, b).
The posterior cardinal veins run caudal to the heart and distally develop an interconnecting iliac anastomosis. Con­trary to their anterior counterparts, the posterior cardinal veins regress almost completely. Only a small proximal segment remains on the right side to form the azygos arch and the iliac anastomosis to transform into the common, external, and internal iliac and median sacral veins.
Most veins, caudal to the heart, develop from the sub- and supracardinal veins, which arise dorsal and ventral to the regressed posterior cardinal veins, respectively. The subcar­dinal veins anastomose with each other (subcardinal anasto­mosis) and with the supracardinal veins (subsupracardinal anastomosis). The majority of the left-sided cardinal veins regress. The right subcardinal vein develops to drain most of the upper, the right supracardinal vein most of the lower part of the abdomen.
3,4
The Vein Book
15
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Copyright © 2006, Elsevier Inc.
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Majority of the azygos system develops from the cranial part of the supracardinal veins. The infrarenal segment of the inferior vena cava (IVC) develops from the caudal right supracardinal vein. The renal segment of the IVC arises from the subsupracardinal anastomosis, a venous network
TABLE 2.1 Historic and New Anatomic Terms of Lower
Extremity Veins
Historic term New term
Greater or long saphenous vein Great saphenous vein (GSV) Smaller or short saphenous vein Small saphenous vein (SSV) Saphenofemoral junction Confl uence of the superfi cial inguinal veins Giacomini’s vein Intersaphenous vein Posterior arch vein or Leonardo’s Posterior accessory great vein saphenous vein of the leg Superfi cial femoral vein Femoral vein Cockett perforators (I,II,II) Posterior tibial perforators (lower, middle, upper) Boyd’s perforator Paratibial perforator (proximal) Sherman’s perforators Paratibial perforators 24 cm perforators Paratibial perforators Hunter’s and Dodd’s perforators Perforators of the femoral canal May’s or Kuster’s perforators Ankle perforators
located circumferentially around the aorta (renal collar). Eventually, the posterior segment of the collar regresses and the anterior part gives the left renal vein. Most of the supra­renal segment of the IVC develops from the right subcardi­nal vein, except for the short hepatic segment, which originates directly from hepatic sinusoids.5 Variation in the complex development of IVC and left renal vein is not uncommon. If the right subcardinal vein fails to connect to the liver sinusoids, the suprarenal segment of the IVC will not develop, consequently the lower part of the body will be drained through the azygos system and the liver will drain directly into the heart. Double IVC (0.2–3%) occurs due to the persistence of the left supracardinal vein, therefore it usually involves only the infrarenal segment (see Figure
2.2).6 Left-sided IVC (<0.5%) develops if persistence of the left supracardinal vein is associated with regression of the right supracardinal vein (see Figure 2.2).7 Developmental variations of the left renal vein include persistent (circum­aortic) renal collar (1–9%) and retroaortic left renal vein (1–2%) (see Figure 2.3).
8
Capillaries of the primitive limb buds initially drain into the marginal sinuses. In the arm the ulnar portion of the marginal sinuses dominate over the radial ones, and eventu­ally form the basilic, axillary, and subclavian veins. The
FIGURE 2.1 Embryology of the major veins (adopted from Avery LB. Developmental Anatomy, revised 7
Philadelphia: WB Saunders, 1974).
th
ed.
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subclavian vein drains into the proximal anterior cardinal vein. The cephalic vein develops secondarily from segments of the radial marginal sinuses and attaches to the axillary vein later. In the leg, segments of the primitive marginal sinuses persist only distally and develop into the peroneal, anterior tibial, and small saphenous veins. The great saphe­nous vein originates from the posterior cardinal vein and later gives off the femoral, popliteal, and posterior tibial veins.
HISTOLOGY
The venous wall has three layers: intima, media, and adventitia. The intima is made up by endothelial cells and an underlying thin connective tissue layer. Valves are formed by infolding of the intima, therefore they are covered with endothelium on both sides and have a very thin connective tissue skeleton. Venous valves are bicuspid. The veins are distended at the base of the valves, probably secondary to the effects of local fl ow reversal. The border of the intima is marked by the internal elastic lamina: a layer of thick elastic fi bers. The internal elastic lamina is well developed only in large veins; it is incomplete in medium-sized and absent in small ones. The media is composed of smooth muscle cells and connective tissue fi bers, most of which is collagen. Larger superfi cial veins, such as the GSV, have thick muscular media with the ability of signifi cant contrac­tion. Smaller tributaries of the GSV have thinner media, and therefore are more prone to varicosity. Media of the deep
FIGURE 2.2 Developmental anomalies of the superior (SVC) and infe-
rior vena cava (IVC). a. Double SVC (posterior view). b. Left SVC (pos­terior view). c. Double IVC. d. Left IVC.
calf veins contain plenty of collagen, providing better wall strength. More central deep veins, such as femoral, iliac, axillary, and subclavian veins, contain less and less smooth muscle cell. The media of the superior and inferior vena cava is built up almost exclusively from connective tissue. The adventitia is poorly differentiated from the media, in particular in larger veins. It consists of some loose connec­tive tissue with vasa vasorum and nerve fi bers.
9,10
FIGURE 2.3 Circumaortic renal collar.
ANATOMY OF THE THORACIC VEINS
The superior vena cava (SVC) starts at the confl uence of the brachiocephalic veins behind the fi rst right costal carti­lage, and ends at the level of the third right costal cartilage where it drains into the right atrium. The SVC is about 7 cm long and 2 cm wide. Halfway along its course, before it enters the pericardium, the SVC receives the azygos arch. The brachiocephalic veins are formed at the confl uence of the subclavian and internal jugular veins behind the sterno­clavicular joints (see Figure 2.4). The right brachiocephalic vein is short, about 2–3 cm, and lies anterior to the innomi­nate artery. obliquely behind the manubrium from left to right, anterior
7
The left one is about 6 cm long and courses
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gives the entire right arm of the H, the hemiazygos gives the left lower and the accesory hemiazygos vein the left upper segment. The azygos vein starts at T12 to L2 with the con­fl uence of the right ascending lumbar and subcostal veins. The azygos vein ascends on the right side up to the level of T4, then passes anterior to form an arch joining the SVC. Major tributaries of the azygos vein are the right posterior fi fth to eleventh intercostal veins and the right superior inter­costal vein draining the second to fourth intercostal veins. The hemiazygos vein starts similar to the azygos vein but on the left side of the vertebral column at T12–L2. It courses cranial and at the level of T8 it crosses over to join the azygos vein. Major tributaries of the hemiazygos vein are the left posterior eighth to eleventh intercostal veins. The accessory hemiazygos vein has more variation than the azygos and hemiazygos veins. Usually it drains the left superior intercostal vein (which in turn drains the left second to fourth intercostal veins) and the left posterior fi fth to seventh intercostal veins. At the level of T7 it either crosses over to the right and joins the azygos or stays on the left and joins the hemiazygos vein. If the connection between the accessory hemiazygos and the rest of the azygos­hemiazygos system is not developed, the accessory hemi­azygos vein will drain through the left superior intercostal vein into the left brachiocephalic vein. The azygos­hemiazygos system receives several small veins from the viscera of the chest and freely anastomoses with the verte­bral venous plexuses as well. The azygos-hemiazygos system provides an important collateral pathway in case of IVC or SVC obstruction.
7
FIGURE 2.4 Thoracic and retroperitoneal veins.
to the left subclavian, common carotid arteries, and superior to the aortic arch. Major tributaries of the brachiocephalic veins are the vertebral, internal thoracic, and inferior thyroid veins. The fi rst intercostal vein drains into the brachioce­phalic veins on both sides. The left superior intercostal vein is connected to the left brachiocephalic vein, whereas on the right it joins the azygos vein. There are no valves in either the SVC or the brachiocephalic veins.
The azygos-hemiazygos system forms an H-shaped network in the posterior mediastinum, anterior to the body of the thoracic vertebrae (see Figure 2.4). The azygos vein
ANATOMY OF THE UPPER
EXTREMITY VEINS
The dorsal and palmar digital veins join to form the metacarpal veins, which drain into the superfi cially located dorsal venous network of the hand. The cephalic and basilic veins arise from this network on the radial and ulnar side of the wrist, respectively. The superfi cial veins on the palmar side of the hand are richly anastomosed to the deep veins. A superfi cial and a more proximal deep venous arch is formed from the interconnection of the palmar veins and parallel the corresponding arterial arches.
The cephalic vein originates at the anatomical snuff box from the dorsal venous network. It courses over the distal radius to the ventral aspect of the forearm and ascends on the lateral side of the arm. The cephalic vein runs in the deltopectoral groove, it enters the infraclavicular fossa behind the pectoralis major muscle and pierces the clavipec­toral fascia before empting into the axillary vein (see Figure
2.5). The basilic vein begins on the ulnar side of the wrist, passes along the ulnar aspect of the forearm, and courses more ventrally at the level of the elbow. Above the elbow
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sponding arteries. The three pairs of deep veins of the forearm form the brachial veins at the level of the elbow. The paired brachial veins join the basilic vein to form the axillary vein at the lower border of the teres major muscle (at the lateral border of the scapula on an antero-posterior chest x-ray). The axillary vein is located medial and inferior to the axillary artery and the medial cord of the brachial plexus lies between the two vessels. The axillary vein ends at the outer border of the fi rst rib where it becomes the subclavian vein. The subclavian vein runs posterior and superior to the sub­clavian artery and recives its only major tributary, the exter­nal jugular vein. The subclavian vein ends at the medial border of the scalenus anterior muscle where it joins the internal jugular vein to form the brachiocephalic vein.
There are valves in the superfi cial and deep veins of the arm, although they are not so numerous as in the leg. Valves in the axillary vein usually are located proximal to the junction with the brachial and cephalic veins. The subcla­vian vein has a valve just proximal to the confl uence of the external jugular vein. Upper extremity venous return is maintained mainly by the work of the heart without signifi ­cant contribution of a muscle pump. Therefore the valves are less important from a functional standpoint. Perforators between the deep and superfi cial veins are scarce.
FIGURE 2.5 Upper extremity superfi cial veins.
the basilic vein runs medial to the biceps and at about midway in the upper arm it perforates the deep fascia and joins the brachial vein. After receiving the brachial vein, the basilic vein continues in the axillary vein. The median cubital vein connects the cephalic and basilic veins in the antecubital fossa. The medial antebrachial vein originates from the superfi cial palmar venous plexus and runs on the ventral side of the forearm. It joins either the cephalic or basilic vein or both in the proximal forearm. The accessory cephalic vein originates from the dorsal venous plexus on the ulnar side and crosses over dorsally to join the cephalic vein in the forearm. Variations in the anatomy of superfi cal arm veins are countless.
Deep veins of the hand join to form the paired radial,
ulnar, and interosseus veins, which accompany the corre-
ANATOMY OF THE ABDOMINAL AND
PELVIC VEINS
The inferior vena cava (IVC) begins at the confl uence of the common iliac veins and ascends on the right side of the vertebral column, passes through the tendinous portion of the diaphragm, and after a short course (approximately
2.5 cm) in the chest it terminates in the right atrium at the level of T9. In the upper abdomen the IVC is located pos­terior to the duodenum, the head and neck of the pancreas, the lesser sac, and the liver. The intrahepatic portion of the IVC lies in a groove along the posterior aspect of the caudate lobe. Tributaries of the IVC are the paired lumbar and renal veins and the hepatic veins, additionally on the right side the right gonadal, suprarenal, and inferior phrenic veins also drain into the IVC (see Figure 2.4). The left gonadal and suprarenal veins join the left renal vein, the left inferior phrenic vein drains into the left suprarenal vein. In case of IVC obstruction, communication between the veins of the thoracic and abdominal wall (thoracoepigastric, internal tho­racic, and epigastric veins), the lumbar-azygos anastomosis, and the vertebral plexuses provide important collateral pathways.
The common iliac veins begin at the sacroiliac joint on both sides and end at L5, where they form the IVC. The only tributary of the right common iliac vein is the right ascend­ing lumbar vein; the left common iliac vein drains the left ascending lumbar and median sacral veins (see Figure 2.4).
20 Chapter 2/Venous Embryology and Anatomy
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FIGURE 2.6 Relationship between the fascia and veins of the lower extremity. The fascia covers the muscle and
separates the deep from the superfi cial compartment. Superfi cial veins (a) drain the subpapillary and reticular venous plexuses, and are connected to deep veins through perforating veins (b). The saphenous fascia invests the saphenous vein. The saphenous compartment is a subcompartment of the superfi cial compartment.
The right common iliac vein lies postero-lateral to the right common iliac artery. The distal segment of the left common iliac vein is medial and posterior to the left common iliac artery, the proximal segment is posterior to the right iliac artery and distal aorta. Compression of the proximal left common iliac vein may occur due to the overlying arterial structures. The external iliac vein starts at the level of the inguinal ligament, it courses along the pelvic brim and ends anterior to the sacroiliac joint where the external and internal iliac veins form the common iliac vein. On the right the distal external iliac vein is medial to the artery; however, as it ascends, more proximally, it courses posterior to it. The left external iliac vein remains medial to the artery along its entire course. Tributaries of the external iliac vein are the inferior epigastric, deep circumfl ex iliac, and pubic veins. The internal iliac vein runs postero-medial to the internal iliac artery on both sides. The short trunk of internal iliac vein is formed by the confl uence of extra and intrapelvic venous tributaries. The extrapelvic tributaries include the gluteal (superior and inferior), internal pudendal, and obtu­rator veins, which drain the pelvic wall and the perineum. Intrapelvic tributaries of the internal iliac vein are the lateral sacral and visceral (middle rectal, vesical, uterine, and vaginal) veins, which drain the presacral and pelvic visceral venous plexuses (rectal, vesical, prostatic, uterine, and vaginal).
Both the IVC and the common iliac veins are valveless. There is usually one valve in the external iliac vein, however often it is without any valves.
ANATOMY OF THE LOWER
EXTREMITY VEINS
Thorough knowledge of the fascial compartments of the leg is a prerequisite of understanding the relationship between superfi cial and deep veins. The fascia surrounding the calf and thigh muscles separates two compartments: the superfi cial compartment, consisting of all tissues between the skin and the fascia, and the deep compartment, which includes all tissues between the fascia and the bones (see Figure 2.6).11 Superfi cial veins run in the superfi cal, deep veins in the deep compartments. Perforating veins pierce through the fascia and connect the superfi cial to deep veins.12 Communicating veins connect veins within the same com­partment: superfi cial to superfi cial or deep to deep veins. The saphenous veins are covered by a fi brous sheath, the saphenous fascia. The saphenous fascia is thinner than the deep fascia and it is more pronounced in the upper-mid thigh, than more distally. nous and muscular deep fascia is the saphenous compart­ment. The saphenous compartment is a subcompartment of the superfi cial compartment.
The superfi cial venous system of the foot is divided into the dorsal and plantar subcutaneous venous network (see Figure 2.7). Superfi cial vein tributaries drain blood into the dorsal venous arch on the dorsum of the foot at the level of the proximal head of the metatarsal bones. The medial and lateral end of this arch continues through the medial and
1,13
The space between the saphe-
Anatomy of the Lower Extremity Veins 21
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FIGURE 2.7 Superfi cial and perforating veins of the foot and ankle.
lateral marginal vein into the great (GSV) and small saphe­nous veins (SSV), respectively.
Small superfi cial veins drain the subpapillary and reticu­lar plexuses of the skin and subcutaneous tissues to form bigger tributaries, which eventually all connect to the saphe­nous veins.
14,15
The GSV begins just anterior to the medial ankle, crosses in front of the tibia, and ascends medial to the knee (see Figure 2.8).
16–18
Proximal to the knee, the GSV ascends on the medial side of the thigh and enters the fossa ovalis 3 cm inferior and 3 cm lateral to the pubic tubercle.19 The GSV is doubled in the calf in 25% of the population, in the thigh in 8%.20 The saphenous nerve runs in close proxim­ity to the GSV in the distal two-thirds of the calf. Accessory great saphenous veins are frequently present and they run parallel to the GSV both in the thigh and in the leg; they lie either anterior, posterior, or superfi cial to the main trunk. The posterior accessory GSV of the leg (Leonardo’s vein or posterior arch vein) is a common tributary, it begins poste­rior to the medial malleolus, ascends on the posteromedial aspect of the calf, and joins the GSV distal to the knee (see Figure 2.8). The anterior accessory GSV of the leg drains the anterior aspect of the leg below the knee. The posterior accessory GCV of the thigh, if present, drains the medial and posterior thigh.
11
The anterior accessory GSV of the thigh collects blood from the anterior and lateral side of the thigh (see Figure 2.8). The anterior and posterior accessory GSVs join the GSV just before it ends at the confl uence of superfi cial inguinal veins (saphenofemoral junction). The superfi cial circumfl ex iliac, superfi cial epigastric, and exter-
FIGURE 2.8 Superfi cial and perforating veins of the leg.
nal pudendal veins join each other and the distal GSV to form the confl uence of superfi cial inguinal veins (sapheno-
21
femoral junction) (see Figure 2.9).
Rarely, the GSV termi­nates high on the lower abdomen or joins the femoral vein very low and the superfi cial inguinal veins empty individu­ally into the femoral vein.22 Other occasional tributaries of the GSV in the groin include the posterior and anterior thigh circumfl ex veins.
The small saphenous vein (SSV) lies lateral to the
Achilles tendon in the distal calf (see Figure 2.10).
23
In the lower two-thirds of the calf the SSV runs in the subcutane­ous fat, then it pierces the fascia and runs between the two heads of the gastrocnemius muscle. In the popliteal fossa at about 5 cm proximal to the knee crease, the main trunk of the SSV drains into the popliteal vein. A smaller vein, the cranial extension of the SSV, frequently continues in ceph­alad direction (see Figure 2.10).24 Uncommonly the main trunk of the SSV continues without draining into the popli­teal vein and eventually empties into the femoral vein or GSV.11 The intersaphenous vein (vein of Giacomini) is a communicating vein connecting the SSV to the GSV in the