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Fig. 32.5 (a) The sequela of the skin scar at the postero- lateral compartment. (b, c) At one-year neurolysis, of the median and ulnar nerve, transfers of BR to wrist extensors were carried out. (d–f) Follow-up at six years: good range
of motion at the elbow associated with active wrist exten­sion. Grip strength measured by Jamar reduced to one­third compared to the unaffected side
believe that scar excision and palliative surgery should be postponed to an age where one can rely on the understanding and collaboration of the young patient (Fig.32.6). In severe injuries, the
most affected compartment is usually the volar one where often free muscle transplantation should be carried out, while in the dorsal com­partment, there is often the possibility of pallia-
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32 Compartment Syndromes (CS) and Volkmann’s and Upper Limb Vascular Pathology in the Peri…
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Fig. 32.6 (a) The scar sequela of a sentinel lesion with the underlining Volkmann’s contraction of the muscle of the postero-lateral compartment. (b) No active contrac­tion of the EDC while EIP and EDM are normal. FCU was transferred early in life to EDC leading, during growth, to
tive surgery preceded by excision of the scar tissue. In the severe Volkmann’s retraction of both compartments, similar to the adult, there is no alternative to the double free muscle trans­plant [21].
In the infant who suffered severe neonatal compartment syndrome leading to both volar and dorsal compartment muscle losses, a staged approach is warranted. Exploration with debride­ment of nonviable muscle as well as neurolysis is important, as this prevents xed contractures and assists with re-gaining hand sensation and intrin­sic muscle function. This should be performed within the rst few months of life if the patient is medically stable. It is important to suture the ends of the FDP tendons to the radius in the fore­arm to prevent retraction into the carpal tunnel, which can make secondary reconstruction much more difcult. In addition, tagging of the ends of the future donor nerves, most commonly anterior
a gradual dorsal contracture of the wrist. (c, d) Long-term follow-up after tenolysis of the tendon transfer and dorsal capsulotomy of the wrist. Normal function of EDC.AROM at the wrist improved from 70° xed in extension to +20° of active exion
and posterior interosseous nerves, can be very helpful when performing the secondary function­ing muscle transfer. Occupational therapy is also an imperative adjunct in these patients to obtain full passive range-of-motion and prevent xed contracture. This allows secondary free function­ing muscle transfer to be performed when the patient is older, 1–3 years of age, and structures are larger. Usually, the exor compartment is rst to be reconstructed, followed by the extensor compartment 1–2 years later (Fig.32.7) contrary to Chuang who performed by rst reconstructing the muscles of the extensor group followed by the free transplant in the exor group when the rst ones displayed signs of reinnervation [11]. Permanent nerve injuries can be prevented when they are supercialized at an early stage. Otherwise, the repair will be proportional to their severity: neurolysis, nerve grafts or implementa­tion of the Strange technique [53, 54].
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Fig. 32.7 (a) Initial presentation two weeks after birth. (b) After debridement and therapy, prior to free function­ing muscle transfer. (c) Intra-operative debridement sur-
gery. (d) Postoperative gracilis transfer to volar and dorsal compartment
32 Compartment Syndromes (CS) and Volkmann’s and Upper Limb Vascular Pathology in the Peri…
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Fig. 32.8 Vascular lesion of a newborn left upper limb where multiple debridements were carried out. The whole area covered by granulation tissue ready for skin grafting
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Fig. 32.7 (continued)
32.6 Vascular Lesions
32.6.1 Spontaneous Vascular Lesions
Neonatal ischaemia of the upper limb represents a rare occurrence, and to distinguish it from the compartment and Volkmann’s syndromes described in the previous section, it can be simply assumed that for its treatment, a decompression of the affected muscle compartments is not suf­cient, whereas a substantial medical or surgical intervention on the arterial or venous system is indispensable [55].
A fasciotomy should be considered a comple­mentary measure, but the gangrene of the new­born (Figs.32.8 and 32.9) can only be prevented by intervening directly on the major vascular axes.
Fig. 32.9 Clinical picture of a severe ischaemia of the left upper limb
When this is not feasible for technical reasons (avulsion of iliac vessels) or general health of the newborn (coexisting hyaline membrane dis­eases), the residual survival of the limb is entrusted to the establishment of collateral circulation.
The experience on which this chapter is based refers to the 32 cases already reported by GEOP (Paediatric Orthopedic Group) collected in France, Canada, Portugal and Belgium [29] in addition to 3 cases, treated by the Modena Hand Surgery Unit, for a total of 35 cases.
Vascular lesions of the upper limbs in the peri­natal period are quite rare: it should be consid­ered that less than 100 cases of ischaemia of the limbs (upper and lower) at birth or in the rst hours of life are reported in the literature [38].
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Vascular lesions may be spontaneous and often generated as a result of renal vein thrombo­sis where the presence of calcic thrombus stands for an intrauterine genesis [56].
Vascular lesions may fall into group I (Table32.2) due to impairment of a large arterial vessel (phlegmasia alba dolens) or venous vessel (phlegmasia cerulea dolens) or group III where pre-existing systemic factors (meningococcal septicaemia, epidermidis staphylococcal septi­caemia, dehydration, etc.) are to be considered responsible for the involvement of several limbs with consequent necrosis of small and large segments.
In utero ischaemia of the limb may be associ­ated with necrosis of the ipsilateral hemiface gen­erated by a placental thrombus likely migrated through the oval foramen destined to the brachio­cephalic arterial trunk [35].
Limb ischaemia manifests itself at birth or within a few hours after birth. Several conditions can cause ischaemic episodes: thromboembolism could be a cause and be associated with maternal diabetes, gestational hypertension (eclampsia and pre-eclampsia), oligohydramnios and pres­sure of maternal pelvic structures. Venous thrombosis and thromboembolism are well­known complications in infants of diabetic moth­ers. Oppenheimer and Esterley, in their 4000 newborn autopsies, describe 45 cases of venous thrombosis, 13 of which from diabetic mothers [57]. Renal and adrenal veins are usually more frequently involved.
Vallerame [58] published the rst case of peripheral gangrene in a newborn from a diabetic mother in 1972, hypothesizing that the adrenal vein was the probable starting point of the embolus occluding the right brachial artery, which it reached through the patent foramen ovale.
Carr [41] hypothesized that the emboli result­ing from a placental infarction could be trans­ported in the right ulnar artery and in the right internal carotid artery of the newborn through the same foramen.
Extremity gangrene is a very likely complica­tion of neonatal infections in the presence of severe dehydration [6, 35] or meningococcal [34] (Fig.32.10) or staphylococcus epidermidis septi-
caemia (Table32.2). There is also the sector of multiple gangrene with self-amputation in asso­ciation with severe dehydration, even in the absence of occlusive vascular phenomena. The most frequent cause is related to adverse underly­ing conditions, such as illiteracy and tribal prac­tices, which for the treatment of mild intestinal disorders resort to herbal enemas that also have a cytotoxic effect on the kidney and liver. Herbal enemas can have a phlebo-occlusive effect and the vaso-constrictive effects typical of the alka­loids of ergot [6]. The clinical picture is charac­terized by dehydration, acidosis, hyperuricemia and renal failure. Gangrene can affect all four limbs, the tip of the nose, ears or perineum as in case of meningococcal septicaemia.
On the neonatal side, the immaturity of the coagulation systems and the presence of congeni­tal thrombophilia play a relevant role [38]. Moreover, in the cardiovascular pathology, ana­tomical anomaly situations can be at the basis of a paradoxical embolism that starting from the maternal or foetal periphery (placental embolism or renal and adrenal veins) is distributed to the vascular district of the upper limb (an axillary or humeral) and/or to the cerebral circulation becoming responsible for the porencephalic degeneration found in 9 of the 32 cases reported by Romaña [29]. The most frequent cardiovascu­lar malformations associated with upper limb abnormalities are atrioventricular defects (atrial septal defect (ASD) and ventricular septal defect (VSD)), Fallot’s tetralogy, large vessel transposi­tion and the presence of the common arterial trunk [55, 59], but especially emboli that can spread from the closing arterial duct.
32.6.2 Iatropathic Causes
The most frequent etiopathogenesis of vascular lesions of the upper limb, however, is iatropathic, linked to the more aggressive attitude in the treat­ment of infants at risk in intensive care units, and it might include a false aneurysm caused by the perforation of the lower third of the humeral artery that required excision and microsurgical repair [60].
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Fig. 32.10 (a) Four-limb amputation as consequence of a meningococcal septicemia occurred after birth. Residual trans-metacarpal amputation on the right side with mini­mal function. (b) Corresponding X-rays. (c-d) Deepening
of the rst web by a local plasty according to the Ostrowsky technique. (e) Functional opening of the web. (f) Possibility of performing bimanual activities
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In a seemingly inexplicable way, even the injection of an unknown substance, in a newborn suffering from gastroenteritis into the anterior belly of the deltoid muscle, resulted in severe vascular suffering followed by an amputation of the middle third of the arm [61].
Regarding the use of central venous catheters (CVC), the access can be supercial or deep: among the supercial access routes, it is worth mentioning the cephalic, the basilic and the exter­nal jugular veins and among the deep ones, the internal jugular and the subclavian veins.
Venous embolisms can pass to the arterial cir­cle, always through the oval foramen, causing peripheral ischaemia of the limbs.
Data from the Canadian Registry showed an incidence of 3.5 events of thromboembolism related to the presence of CVC for every 100,000 admitted patients. According to the same authors, the placement of a central route, used for the administration of liquids, drugs, parenteral nutri­tion or chemotherapy, would be responsible for about 90% of DVT (deep vein thrombosis) and pulmonary embolisms in the rst year of life [38].
The indication to use arterial catheters is based on the need to perform frequent blood tests or to continuously monitor blood pressure. In the neo­natal age, within the rst 24–48 h of life, arterial cannulation can be performed through the umbil­ical arteries.
In case of failure of the umbilical access or in case of infants over 48 h of life, the radial artery stands for the most used access; the criteria of choice towards this artery are represented by its supercial anatomical path and good secondary circulation (validated by Allen’s test). The per­manence of the catheter in the artery must not exceed 72–96 h.
Ischaemia is not the only complication that can occur after radial catheterization: there can also be a bacterial infection. The most frequently identied germs are staphylococcus and strepto­coccus, which are usually non-pathogenic but might become so in the presence of debilitated patients or those with an underdeveloped immune system like the newborn.
32.6.3 Complications inStabilized Outcomes
CS and Volkmann’s perinatal pathology are pecu­liar conditions connoted by scanty report and unavailable long-term outcome studies.
There are substantial differences in the timing of execution of fasciotomy, especially between the newborn and adult. In the adult, fasciotomy may sometimes be useless if performed for a suprafascial oedema mainly in burns carrying the side effects such as lack of strength at the hand and fatigue in walking [15].
Late fasciotomy is often subject to bacterial colonization, and when incomplete, it can be accompanied by the brous evolution of the non­decompressed myotendinous components, whereas late paediatric fasciotomy is not neces­sarily related to irreversible outcomes [18, 21]. In traumatology, fasciotomy has been performed for up to 88 h [7] 7 days [62] with an almost always complete recovery of function [63].
This observation is conrmed by a retrospec­tive analysis conducted at the Mayo Clinic by Eichler and Lipscop [64]. This observation sug­gests that in these circumstances, there might be a subliminal muscle circulation or early neoan­giogenesis in children that guarantees their sur­vival or that the muscles in the perinatal age group have a greater tolerance to ischaemia than in adulthood.
In the surgical treatment of Volkmann’s con­tracture, the possible complications are liaised to exor origin sliding or functional free muscle transfer. In this last scenario, the complications can be categorized as acute or chronic: underly­ing ap loss (either skin paddle or partial muscle loss). Long-term complications include scarring and tendon attenuation at the repair site [5, 21].
In paediatric patients, bone growth may be more rapid compared to the transferred muscle, to which the following coercive aspects to the surrounding scarring retractions can be added, which can lead to joint contracture and tendon adhesions despite excellent muscle contraction [13, 21]:
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– The slowly increasing tenodesis effect of a
premature tendon transfer, which might lead during growth to an extension contracture of the wrist.
– Ulnar deviation of the wrist usually occurs
when muscle sliding has been associated with carpal tunnel decompression leading to a volar dislocation of exor tendons which implies that the tunnel should be repaired in the rst instance.
– Joint stiffness mainly at the MPJ and wrist
level which can assume aspects of severity that can only be encountered in arthrogryposis and may require rst row carpectomy.
– Pseudoarthrosis, retracting scars and contrac-
ture of the rst web space (Fig.32.11) may be present both in Volkmann’s outcomes and in vascular lesions of the perinatal period [17].
32.6.4 Dierential Diagnosis
The almost constant skin lesion is the one that has certainly aroused the most interest in the vari­ous medical disciplines. Effectively, this area of the skin with the subcutaneous tissue with an inammatory reaction can occur in different elds. This description coincides with the one given by R.Lightwood [2] and by Haymann [3] where three cases of infants who had fat necrosis were reported above the elbow were suggestive of compression syndrome of the radial nerve in the region of the spiral groove. C.V Feldmann [65] also reported four cases, one of which was a bilateral paresis of the radial nerve highlighted three days after birth associated with fat necrosis of the lateral surface. Function of both wrists was fully restored after three months. A similar expe­rience is reported by Rombouts [9].
Sclerema neonatorum is a systemic form which manifests itself with a hardening of the skin that suddenly appears in the third or fourth day of life, often in malnourished, dehydrated, hypotensive, hyponatremic or hypoglycaemic infants. The thickening often starts from the lower limbs and spreads to the trunk and cheeks. Sclerema is probably the result of an enzymatic neonatal dysfunction involved in the conversion
of saturated palmitic and stearic acid into unsatu­rated oleic acid [66].
Aplasia cutis represents a group of congenital skin lesions ranging from the absence of skin to small achromic scars. The preferred location of these lesions, however, is the scalp but the fore­arm is also frequent. The classical pathogenetic theory of aplasia cutis hypothesized an adhesion between lesions affecting the teguments of the foetus and amnion. It could also be a genetically determined skin malformation because more than 50% of cases are associated with trisomy 13 [3,
17].
Analysing all the reported cases, the neural damage, when present, is framed by a temporal paralysis of the radial nerve that recovers spontaneously and is therefore easily distinguish­able from the muscle contracture associated with a Volkmann’s syndrome of the lateral-external compartment.
Moreover, the congenital deformity in exion of long ngers might be connected to an aberrant origin to exor digitorum profundus [67], a con­dition that belongs to the eld of congenital malformations.
32.6.5 Long-Term Outcomes
As expected, long-term outcome following neo­natal compartment syndrome is largely depen­dent on the severity of involvement. In cases with a skin lesion but no muscle dysfunction or com­partment ischaemia, near full function can be expected although abnormal forearm growth is still the norm and should be discussed with the parents. This is in sharp contrast to the patient that has exor and extensor compartment involve­ment who did not undergo emergent fasciotomy at birth. Depending on the time delay until explo­ration, these patients may have severe joint and skin contractures along with severe neurologic decits in the hand that must be addressed. Even with debridement, neurolysis +/- nerve grafting and free muscle transfer hand function may be limited. However, if timely staged reconstruction is performed, good to excellent results can occur even in the severely involved patient. As dis-
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Fig. 32.11 (a) Skin necrosis at the dorsal aspect of the wrist following extravasation of antirejection drug admin­istration following a renal transplantation in the rst year of life. (b) Surgical debridement and resurfacing by der­mal graft. (c) Clinical appearance a still unclassied syn­dromic pattern. (d) Severe rst web contracture. (e)
Resurfacing by dermal graft. (f) Clinical result following release of the rst web space initially caused by the Volkmann’s contracture of the intrinsic muscle. (g) Functional opening of the wrist web consenting a useful key-pinch
32 Compartment Syndromes (CS) and Volkmann’s and Upper Limb Vascular Pathology in the Peri…
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Fig. 32.11 (continued)
cussed earlier, less involved cases can undergo expectant management depending on the clinical progression of deformity.
32.7 Prevention
f
acquired in 71.4%. Foetal morbidity was mainly linked to the consequences of premature rupture of the membranes (57.1%) and preterm birth (28.5%). The AA concluded that fetoscopic band release was encouraging in cases of ABS in the limbs [69].
In the majority of cases, the newborn will be affected by an irreversible established Volkmann’s contracture. Therefore, it would be reasonable to check if any preventive fetoscopic surgery could be possibly undertaken during the intra-uterine phase. Mentioning of this possibility is made only for amniotic band syndrome to prevent amputation caused by the attachment or entan­glement of amniotic membrane remnants to the foetus. The median gestational week at diagnosis was 22 weeks/5 days [68]. A literature review included a group of patients who had the feto­scopic release of the amniotic bands using a laser (16 cases), scissors (6 cases) or both (5 cases) in a series of 27 cases. In only one case, the hand and ngers were affected; some of his ngers were amputated. In the majority of cases, a single entry was made and a functional limb was
32.8 Conclusions
The borderline between perinatal CS and Volkmann’s contracture in the newborn and in the vascular lesion appears to be very subtle; this is the reason why these topics have been assem­bled in this chapter [23].
For the purpose of the classication of the pathophysiological aspects, we relied on the Holden classication, already described in 1958 by Perricone, to which we made added signi­cant modications [16]. Group A concerning the lesion of a proximal major vessel, which we divided into arterial and venous components including also the distal pathology, is related to the vascular compromise of a muscle with a sin­gle vascular supply (Table32.1).
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