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  IN THIS Article
 »  Abstract
 » Introduction
 » Etiology
 »  Theories on Path...
 » Pathology Findings
 »  Scope of Clinica...
 » Treatment Guideline
 » Prognosis
 » Conclusion
 »  References
 »  Article Tables

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 Table of Contents    
REVIEW ARTICLE
Year : 2018  |  Volume : 22  |  Issue : 12  |  Page : 870-874

Management of symmetrical peripheral gangrene


1 Department of Orthopedics, School of Medicine, Perdana University-Royal College of Surgeons Ireland Selangor, Malaysia
2 Department of Pharmacology, School of Medicine, Perdana University-Royal College of Surgeons Ireland Selangor, Malaysia
3 Department of Surgery, School of Medicine, Perdana University-Royal College of Surgeons Ireland Selangor, Malaysia

Date of Web Publication18-Dec-2018

Correspondence Address:
Dr. Agus Iwan Foead
School of Medicine, Perdana University-Royal College of Surgeons in Ireland, Block D1, MAEPS Building, MARDI Complex, Jalan MAEPS Perdana, 43400 Serdang, Selangor
Malaysia
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijccm.IJCCM_379_18

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 » Abstract 

Symmetrical peripheral gangrene (SPG) is a rare, debilitating disease that deserves more widespread concern among the medical fraternities. The objective of this review is to outline the etiology, pathology findings, and management practices of SPG. About 18%–40% mortality rate was reported, and survivors have high frequency of multiple limb amputations. SPG is the hallmark of disseminated intravascular coagulation (DIC). The main pathogenesis theory, to date, is microthrombosis associated with disturbed procoagulant–anticoagulant balance. The treatment of SPG is largely anecdotal and theoretically involves heparin-based anticoagulation and substitution of natural anticoagulants. Early recognition, prompt management of DIC, and underlying conditions may halt the progression of the disease. The multicenter randomized controlled trial should be set up to formulate the proper treatment guidelines.


Keywords: Disseminated intravascular coagulation, microthrombosis, procoagulant–anticoagulant balance, purpura fulminans, symmetrical peripheral gangrene


How to cite this article:
Foead AI, Mathialagan A, Varadarajan R, Larvin M. Management of symmetrical peripheral gangrene. Indian J Crit Care Med 2018;22:870-4

How to cite this URL:
Foead AI, Mathialagan A, Varadarajan R, Larvin M. Management of symmetrical peripheral gangrene. Indian J Crit Care Med [serial online] 2018 [cited 2019 Jan 21];22:870-4. Available from: http://www.ijccm.org/text.asp?2018/22/12/870/247747





 » Introduction Top


Symmetrical peripheral gangrene (SPG) is a rare complication in the intensive care unit. Its definition involves symmetrical ischemic damage, which occurs at the distal part of the limbs or genitalia, in the absence of a major vascular occlusive disease. It has high risk of mortality and high frequency of multiple limbs amputation in those who survive.[1] SPG should be suspected at the first sign of marked coldness, pallor, cyanosis, or pain in an extremity as the condition can progress rapidly to acrocyanosis and if not reversed frank gangrene. SPG is also sometimes referred to as purpura fulminans (PF). PF is an acute thrombotic disorder which manifests as blood spots, bruising, and discoloration of the skin. It results from coagulation in small blood vessels within the skin and rapidly leads to skin necrosis and disseminated intravascular coagulation (DIC).[2] PF is rare and most commonly occurs in babies and small children although it can also occur in adults with severe sepsis. Its presence is almost always a marker of DIC.[3] In Warkentin's review, both are of the same pathologic condition, i.e., microthrombosis, and both are of the same spectrum of manifestations. When there is additional or predominant nonacral tissue necrosis, the term PF is applicable. Otherwise, it is defined as SPG for clinical investigations.[4]


 » Etiology Top


The etiology of SPG is multifactorial; however, in general, it has been divided into two main categories which are infective factors and noninfective factors.[5],[6],[7],[8],[9] Infective etiology of SPG is as follows: Pneumococcus,[10],[11]Staphylococcus aureus,[10],[12] Neisseria More Details meningitidis,[7],[12]Streptococcus pyogenes,[10]Klebsiella pneumoniae,  Escherichia More Details coli,  Salmonella More Details paratyphi, Proteus vulgaris, Proteus mirabilis, Pasteurella multocida,[13]Pseudomonas,[10],[12]Enterococcus faecalis,[14]Capnocytophaga canimorsus (DF2),[15]Plasmodium falciparum,[16]Mycobacterium tuberculosis,[17] Rubeola, Varicella zoster,[13],[18] dengue,[19] and human immunodeficiency virus.[20] Noninfective etiology of SPG refers to conditions that precipitate SPG occurrence such as myocardial infarction,[13] cardiac failure,[13],[18] hypovolemic shock,[18] hypertension,[18] pulmonary embolism,[13] supraventricular tachycardia,[21] Hodgkin's lymphoma,[22] lung adenocarcinoma,[23] adenocarcinoma-associated thrombotic endocarditis,[24] systemic lupus erythematosus,[25] polymyalgia rheumatica,[22] antiphospholipid syndrome,[26] congenital and acquired protein C and S deficiencies,[27] sickle cell disease,[28] cryoglobulinemia,[28] and idiopathic.[27] SPG can also be caused by drugs such as dopamine,[29] noradrenaline,[30] adrenaline,[31] warfarin,[23],[24] and propylthiouracil.[32],[33],[34] A summary of the etiological factors is shown in [Table 1].
Table 1: Etiology of symmetrical peripheral gangrene

Click here to view



 » Theories on Pathogenesis Top


Both mono limb and symmetrical two or four limbs ischemic necrosis have the same features of microthrombosis associated with a disturbed procoagulant–anticoagulant balance.[4] There is an associated deep vein thrombosis (DVT) in mono limb ischemic necrosis, as seen in the complications of cancer-associated DIC or heparin-induced thrombocytopenia. However, DVT is not found in PF or SPG.

Most authors reported that SPG is a result and manifestation of DIC.[1],[3],[4] This is based on the finding that in DIC, there is a reduction of antithrombin (AT) level,[35] and at the same time, there is increase in the expression of plasminogen activator inhibitor-1 which is mediated by endotoxin and tumor-necrosis-factor-α. Consequently, the exaggerated coagulation together with impaired anticoagulant and fibrinolysis system results in continuous thrombus formation, particularly in systemic small-sized and midsize vessels. This will eventually lead to multiorgan dysfunction[35] and also SPG.[4] Clinically, there are two types of DIC, i.e., one that develops slowly and causes thrombotic and/or embolic manifestations and one that develops rapidly and causes bleeding.[36] SPG is the result of the second-type DIC.

SPG is also theorized to occur due to protein C deficiency and reduced pro-coagulant factor VII. In severe sepsis, there is increased protein C consumption, protein S inactivation, downregulation of cytokine-mediating signaling, and increased proteolytic enzymes release, which in turn favor microvascular thrombosis and increased leukocyte adhesion.[4],[35] Conditions that favor deficiency of protein C can be found in Shwartzman reaction due to meningococcal septicemia,[7],[37] while conditions that favor reduced procoagulant factor VII are seen in complicated cancer patients, heparin-induced thrombocytopenia, or warfarin therapy.[23],[24]

The unique depletion of factor VII and protein C in DIC can partly be explained by their short half-lives, i.e., factor – VII 5 h and protein C – 9 h, compared to prothrombin factor – 60 h.[24]


 » Pathology Findings Top


Biopsy is the most reliable form of diagnosis for the pathology of SPG. Most SPG specimens show microthrombi in the capillary lumen of superficial and deep vascular plexus, accompanied by the deposition of fibrin and subtle extravasation of red blood cells.

Subepidermal cell-poor bulla may be found in biopsy specimen, but neither vasculitis nor inflammatory infiltrates are observed in the vascular walls.[9] Edematous endothelial cells, capillary dilatation, and red cells extravasation contribute to petechial appearance of early lesions, which later will coalesce into the area of ischemic necrosis with associated bullae.[12]

This will first affect the dermal and subdermal tissues. When extensive peripheral necrosis develops, it can involve the underlying tissues and bone.[4] Microangiopathic changes such as schistocytes should be sought on peripheral blood smear because it may indicate the presence of DIC.[9] Postmortem studies on patients who died because of multiorgan failure show microthrombi in kidneys (cortical necrosis), lungs, liver, spleen, adrenal glands, heart, brain, pancreas, and gastrointestinal tract.[4] Bilateral adrenal hemorrhage with evidence of fibrin microthrombi within the adrenal sinusoids is seen in adrenal failure due to meningococcal infection. This is also known as Waterhouse–Friderichsen syndrome.[38]


 » Scope of Clinical Presentations Top


Most patients with SPG have septicemia or in septic shock condition admitted to medical intensive care unit. At least 50% have underlying cancer together with DIC.[39] Some cases have implicated hypotension requiring vasopressor therapy such as dopamine, noradrenaline, or phenylephrine.[4] The affected limb appears pale or bluish discoloration, swollen, and painful (phlegmasia cerulea dolens).[39] Bullae (often hemorrhagic) might develop over the acral region (distal part) of the limb, which indicates tissue necrosis. The dermal lesions are sharply demarcated and symmetric, with initial grayish blue or purple discoloration that will quickly turn to gangrenous.[7] The distal pulses are still palpable even discolorations of distal fingers or toes have occurred.[4],[9] Peripheral Doppler ultrasonography shows that large peripheral arteries are not involved in thrombosis.[10] The ischemic necrosis will typically affect the lower limbs first before the upper limbs.[4] Bone scan can judge the extent of tissue injury.[40] A surge in serum lactate level as well as development of acrocyanosis may be indicative of impending SPG.[1]

Depending on the underlying conditions, mild splenomegaly can be palpated in falciparum malaria;[16] otherwise, the rest of the physical examination is not specific.[2],[4] Laboratory shows similar results with DIC, i.e., thrombocytopenia, elevated fibrin D-dimer, and thrombin-AT complex. International normalized ratio typically exceeds 4.0.[4] Specific test of protein C level is usually <10% of normal.[35] AT level is also reduced due to rapid clearance from circulation after forming complex with thrombin or its degradation by elastases released from activated neutrophils.[35] In patients with heparin-induced thrombocytopenia, the decrease in the platelet count usually begins 5–10 days after the immunizing exposure to heparin.[4] Peripheral blood film may reveal schistocytes[4],[9] or certain parasite such as Plasmodium falciparum.[16] Repeated screening of DIC is advocated because DIC may manifest in the later course of the disease.[10],[12] The summary of useful investigations is summarized in [Table 2].
Table 2: Investigation of symmetrical peripheral gangrene

Click here to view


SPG should be differentiated with other causes of acral gangrene such as thromboangiitis obliterans, atherosclerosis, thromboembolic gangrene, secondary Raynaud's phenomenon, diabetes, neuropathy, chemical or toxic agents, calciphylaxis, and vasculitides.[1] Meticulous analysis of history and natural cause, absence of vasculitides features, and sparing of major arteries, of which pulses can still be palpable, should be able to rule out SPG from other conditions.[9]


 » Treatment Guideline Top


There are minimal evidence-based guidelines for the treatment of SPG. However, it is a general consensus that the goal of treatment is to halt the progression of the disease, to remove the causative factors, to prevent secondary infections, to correct hypovolemia, and to remove nonviable tissue. Management should involve multidiscipline approach involving multiple caregivers, such as internist or critical care specialist, dermatologist, hematologist, and general or orthopedic surgeons. The patient should be admitted to critical care unit. Shock from blood extravasation and sepsis requires extensive fluid replacement. The source of infection or precipitating factors should be sought and treated.[1],[2],[4],[10] Care must be taken to use vasopressor agents in sepsis-induced hypotension as it might aggravate the condition.[30],[31]

DIC should be sought and corrected promptly. Treatment guideline for DIC is quite established with emphasis on treating the underlying disease.[41] If bleeding is predominant, or those at high risk of bleeding requiring invasive procedures, depleted coagulation factors are replaced by the administration of platelet concentrate and fresh frozen plasma.[41] In cases, where thrombosis is predominant, several anticoagulants are available. Low dose of unfractionated heparin (300–500 IU/hour) may be helpful to halt the progression of pregangrenous changes to frank gangrene.[1] However, heparin usage has not been proven to improve the survival in patients with DIC.[10],[41] Low-molecular-weight heparin is found to be superior to unfractionated heparin.[41] AT concentrate also does not significantly show to reduce mortality in DIC patients with severe sepsis.[42] Based on the success of Protein C Worldwide Evaluation in Severe Sepsis trial, Food and Drug Administration in 2002 approved the usage of recombinant human activated protein C (rhAPC) for severe sepsis.[43] However, subsequent randomized controlled trial (RCT) failed to show clinical benefits of rhAPC, and increased incidence of hemorrhage-related adverse events was noted. Thus, rhAPC had been withdrawn from treatment regimens of DIC with sepsis.[44] Treatment with AT and recombinant human-soluble thrombomodulin is recommended in DIC patients with organs failure.[41]

Other medical treatments, such as trimethaphan,[9] sodium nitroprusside,[31] nitroglycerine ointment,[9] intravenous alpha blocker (phentolamine and chlorpromazine),[10] intravenous epoprostenol, and recombinant tissue plasminogen activator,[45] have been reported in the literature; however, there have no proven clinical controlled trials. Other institution also combined with hyperbaric oxygen therapy.[46] However, the use of inferior vena cava filters in patients with hypercoagulable states such as cancer or heparin-induced thrombocytopenia is not advisable because it predisposes to the development of venous gangrene.[14] Papaverine, reserpine, dextran, and usage of plasmapheresis have been used in the treatment of SPG; however, none has proven beneficial.[9]

Limb vascular and compartment pressure should be monitored closely to enable early escharotomy and/or fasciotomy, when necessary.[27] However, fasciotomy may disrupt the skin barrier and results in the interruption or delay of anticoagulant therapy.[4] Bullae from the skin should be treated with topical antimicrobials (such as silver sulfadiazine) to prevent secondary infection.[27] Debridement of nonviable or tissue should be carried out as soon as the patient's condition allows; however, early limb amputation should be avoided. Ample of time should be allowed to observe gangrene demarcation occurs because it can be difficult to distinguish viable and nonviable tissue clinically.[4] The affected areas can be covered with skin graft.[9],[27] Patients, particularly those infected with meningococcal or pneumococcal, should be isolated for monitoring, and the health staffs should administer prophylactic antibiotics as well.[7],[11]


 » Prognosis Top


SPG results in high rates of amputation and mortality. Multiple distal or acral amputations (i.e., fingers or toes) or more proximal amputations (i.e., above knee or elbow) are well-documented sequelae of this condition.[12] Mortality in the acute phase is 18%–40%,[21] while other authors reported as high as 90%.[22]


 » Conclusion Top


SPG is a rare, but devastating complication of sepsis. The treatment of SPG is largely anecdotal.[10] Theoretically, the treatment of the SPG involves heparin-based anticoagulation and the substitution of natural anticoagulants.[4] Early recognition of acrocyanosis, prompt management of DIC and underlying condition, hemodynamic stabilization, and properly controlled usage of anticoagulation may be helpful to halt the progression of pregangrenous stage to frank gangrene.[1] Since the rarity of SPG cases and of high mortality rate, multicenter RCT should be set up to formulate the proper treatment guidelines. The exact pathogenesis links to SPG are still under investigation. Hopefully, research in translational medicine will aid to clarify the pathways and the solution to disturbed procoagulant–anticoagulant balance that leads to SPG.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.



 
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    Tables

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