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Minimizing Postoperative Complications by Preoperative Optimization

Ruben Peralta, Ayman El-Menyar, and Rifat Latifi
26

Introduction

In the quest to provide the best care for patients undergoing major abdominal wall reconstruction, a multidisciplinary and systematic approach should be undertaken by all mem­bers involved in the operative management of the patients. Since the 1980s, we have seen significant advances in the management of medical and surgical conditions of critically injured patients; these advances have led to improved sur­vival and reduced morbidity. However, the practicing sur­geon when faced with the management of the open abdomen and large abdominal wall defects that require major abdomi­nal wall reconstruction needs to be able to provide preopera­tive care that would ensure optimal operative outcomes. The reconstruction of a large abdominal wall defect poses a major burden to patients who are already unconditioned physiologically and psychologically. This chapter focuses on the multidisciplinary approach and measures to be taken into consideration in the preoperative optimization of complex surgical cases, which are frequently associated with compli­cations and mortality.
R. Peralta Trauma Section, Hamad General Hospital, Doha, Qatar e-mail: rperaltamd@gmail.com
A. El-Menyar Department of Surgery, Westchester Medical Center, 100 Woods Rd., Taylor Pavilion Building Media Room, Valhalla, NY 10595, USA e-mail: aymanco65@yahoo.com
R. Latifi ( Department of Surgery, Westchester Medical Center and New York Medical College, 100 Woods Road, Taylor Pavilion Building, Room D347, Valhalla, NY 10595, USA e-mail: rifat.latifi@wmchealth.org
*)

Preoperative Evaluation

All patients undergoing a major abdominal wall reconstruction (AWR) procedure should receive a systematic preoperative evaluation and objective assessment of their risk through validated methods such as those of the American Society of Anesthesiologists (ASA) Physical Status Classification System, the Goldman Cardiac Risk Index, and the like. Obtaining preoperative information can lead to better prepa­ration of the patient for a major surgical procedure and modi­fication of the intraoperative strategy, management, and postoperative care, all of which will result in better outcomes and patient satisfaction. Adopting the concurrent guidelines of preoperative evaluation of complex surgical cases will facilitate the entire process. We should take into consider­ation, however, that “one size does not fit all”; frequently, such complicated patients during their preoperative evalua­tion might require deviations from the already-established guidelines, due to the emergency nature of the required pro­cedure. Other considerations to be addressed during this period include the following: patient and family expectations and that of the expertise of the operating team (i.e., attending surgeon and anesthesiologist, intensive care unit nurses, and other healthcare providers involved in the medical care from admission to discharge, including rehabilitation).
Getting ready for a long and complex reconstructive pro­cedure requires more time and preparation to achieve optimi­zation of the patient. The main goal of the preoperative evaluation is to achieve the best possible optimization of the patient, and this might require the postponement of the defin­itive closure or repair and the establishment of a temporary closure in the acute setting or during the resuscitative phase (damage control concept).
The preoperative evaluation process should be under­taken in a location where all healthcare providers are active participants in the process. Our experience and contemporary literature confirm that when a multidisci­plinary team works together and is efficient, reduces the
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chance of errors, reduces the cost, and decreases operating room cancellations.
The evaluation process starts with a thorough history and physical examination and should be performed by a multi­disciplinary team. The anesthesiologist, intensivist, and sur­geon involved in the procedure should be part of the evaluating team and ideally should communicate the indica­tions and risk of the procedure to the patient and close rela­tives in the same setting.

Assessing the Perioperative Risk

Assessing the risk in a systematic fashion is imperative and should focus on evaluating the capacity of the patient to withstand the acute physiological stress resulting from pro­longed operative procedures and general anesthesia that extends well into the recovery and rehabilitation phases. Furthermore, team should be able to treat major life­threatening conditions, such as hypoxia, hypoglycemia, major fluid and electrolyte imbalances, sepsis, coagulopathy, and other major organ impairment, and estimate if the patient can meet the increased oxygen demand caused by the stress response to surgery and anesthesia. By zeroing in on the neu­rological, cardiovascular, respiratory, and renal systems, a better grasp of the short and long-term functional outcome of those patients would be attained.

Neurological System Evaluation

A significant number of patients have a history of major inju­ries, including traumatic brain injury, major abdominal vas­cular injury, and devastating surgical catastrophic conditions requiring prolonged hospitalization. Furthermore, delirium is a common condition in these patients and is associated with increased length of stay, morbidity, and mortality.
Patients with recent history of traumatic brain injury, spi­nal cord injury, and cerebrovascular accident or patients with high index of clinical suspicion or recent neurological dete­rioration might require neuroimaging studies and monitoring prior to the procedure. If the major abdominal wall recon­struction will be performed during the acute traumatic brain injury phase, an intracranial pressure (ICP) monitoring device might be indicated as per The Brain Trauma Foundation: Guidelines for the Management of Severe Traumatic Brain Injury.
Patients with a spinal cord injury may present unique challenges in the management of the intraoperative, acute postoperative, and rehabilitation phases depending on the level of the cord injury. Patients with high spinal cord injuries might require a secure airway, prolonged ventilator support, and prolonged rehabilitation care in specialized centers.

Cardiovascular System Evaluation

Patients undergoing major abdominal wall reconstruction are at risk of major perioperative cardiac events. According to the American College of Cardiology/American Heart Association (ACC/AHA), intraperitoneal surgery carries intermediate risk with a reported risk of cardiac death or nonfatal myocardial infarction (MI) of 1–5%. There are numerous guidelines used in the evaluation of the cardiovas­cular risk. Some patients, however, arrive with devastating neurological and orthopedic injuries or are elderly, which makes the process of obtaining an accurate functional status almost impossible, partly because of their limited mobility or altered mental status. It is also pertinent to mention that there are important limitations of some of the cardiovascular risk indexes. For example, the Lee index is a practical way to assess the cardiac risk in stable old patients, but it does not take into consideration emergency surgery and the increasing number of elderly patients undergoing surgical procedures today. In addition, it is important to delineate that currently many of the multiple procedures included in such risk indexes are performed in a minimally invasive fashion.
Lee index comprises of six questions that evaluate patients for high-risk surgery (i.e., intraperitoneal) or not, having cor­onary artery disease (CAD) or not, having congestive heart failure or not, having insulin-dependent diabetes mellitus or not, having cerebrovascular accident or not, and finally hav­ing serum creatinine level >2 mg/dL or less. This risk index needs to be used in the context of the contemporary ACC/ AHA guidelines on perioperative cardiovascular evaluation and care for non-cardiac surgery.
Summary of the 2014 ACC/AHA Guidelines
According to the ACC/AHA guideline, the incidence of cardiac morbidity after non-cardiac surgery depends on the definition of CAD, which ranges from only rising of cardiac biomarkers to the more classic clinical ischemic heart dis­ease (IHD) spectrum. Few studies showed that merely ele­vated serum troponin post-abdominal surgery is associated with a considerable 30-day mortality rate. The stability and timing of a recent MI have great impact on the incidence of perioperative morbidity and mortality. Data showed very higher morbidity and mortality rates in patients with unsta­ble IHD than those who had stable angina. However, this risk could be modified by the presence and type of coronary revascularization in terms of coronary artery bypass grafting (CABG) or percutaneous coronary interventions (PCI) that was done at the time of the acute coronary event.
Previous data showed that 60 days should be allowed after a MI before non-cardiac surgery in the absence of a coronary intervention. A recent MI (i.e., within 6 months of
26 Minimizing Postoperative Complications by Preoperative Optimization
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non-cardiac surgery) was reported as an independent risk factor for perioperative stroke, which was associated with an eightfold increase in the perioperative death rate.
Patient age has a great impact on the postoperative out­come. Patients (>65 years old) undergoing non-cardiac sur­gery have a higher incidence of acute ischemic stroke than for those who were 65 years of age. Furthermore, age > 62 years is an independent risk factor for perioperative stroke.
Clinically, the presence of preoperative third heart sound and jugular venous distention are useful signs that indicate the presence of heart failure (HF) and have the strongest association with perioperative major adverse cardiac event (MACE). Patients with HF who undergo major surgical pro­cedures have substantially higher risks of operative death and hospital readmission than do other patients. Moreover, data showed that patients with HF and preserved left ventricular ejection fraction (LVEF) had a lower all-cause mortality rate than did of those with HF and reduced LVEF. The risk of death did not increase notably until echocardiogram showed a decrease of LVEF below 40%.
Generally, routine preoperative coronary angiography is not recommended due to lack of data to support the use of coronary angiography in all patients as a routine testing, including patients undergoing any specific high-risk surgery. The indications for preoperative coronary angiography are similar to those identified for the non-operative setting. Coronary computerized tomography angiography may be safer but, again, data on its indication are limited as a periop­erative screening tool.
After perioperative evaluation before elective non- cardiac procedures, if the results indicate the need for CABG sur­gery, coronary revascularization should be performed before a high-risk surgical intervention.
The indications of PCI before non-cardiac surgery should be limited to patients with left main coronary artery disease whose comorbidities preclude CABG without undue risk and patients with unstable IHD who would be appropriate candi­dates for emergency or urgent revascularization. Patients with acute MI benefit from early invasive management. However, if the non-cardiac surgery is time sensitive despite an increased risk in the perioperative period, a strategy of bal­loon angioplasty or bare-metal stent (BMS) implantation should be the plan.
There are no prospective randomized clinical trials data to support the use of coronary revascularizations before non­cardiac surgery aiming to decrease the intraoperative and postoperative cardiac events.
Elective non-cardiac surgery should be delayed 2 weeks after balloon angioplasty (Level of Evidence: C) and 1 month after BMS implantation (Level of Evidence: B). Elective non- cardiac surgery should optimally be delayed 1 year after drug-eluting stent (DES) implantation (Level of Evidence: B).
In patients in whom non-cardiac surgery is required, a consensus decision among treating clinicians as to the rela­tive risks of surgery and discontinuation or continuation of antiplatelet therapy can be useful (Level of Evidence: C).
PCI should not be performed as a prerequisite in patients who need non-cardiac surgery unless it is clearly indicated for high-risk coronary anatomy (e.g., left main disease), unstable angina, MI, or life-threatening arrhythmias due to active ischemia amenable to PCI.
If PCI is necessary, then the urgency of the non-cardiac sur­gery and the risk of bleeding and ischemic events, including stent thrombosis, associated with the surgery in a patient taking dual antiplatelet therapy (DAPT) need to be considered.
If there is little risk of bleeding or if the non-cardiac surgery can be delayed 12 months, then PCI with DES and pro­longed aspirin and P2Y12 platelet receptor–inhibitor therapy is an option.
If the elective non-cardiac surgery is likely to occur within 1–12 months, then a strategy of BMS and 4–6 weeks of aspirin and P2Y
platelet receptor–inhibitor therapy with
12
continuation of aspirin perioperatively may be an appropriate option.
If the non-cardiac surgery is time sensitive (within 2–6 weeks) or the risk of bleeding is high, then consideration should be given to balloon angioplasty with provisional BMS implantation.
If the non-cardiac surgery is urgent or an emergency, then the risks of ischemia and bleeding, and the long-term benefit of coronary revascularization must be weighed. If coronary revascularization is absolutely necessary, CABG combined with the non-cardiac surgery may be considered.
In patients undergoing urgent non-cardiac surgery during the first 4–6 weeks after BMS or DES implantation, DAPT should be continued unless the relative risk of bleeding out­weighs the benefit of the prevention of stent thrombosis (Level of Evidence: C).
In patients who have received coronary stents and must undergo surgical procedures that mandate the discontinua­tion of P2Y12 platelet receptor–inhibitor therapy, it is recom­mended that aspirin be continued if possible and the P2Y12 platelet receptor–inhibitor be restarted as soon as possible after surgery (Level of Evidence: C).
Management of the perioperative antiplatelet therapy should be determined by a consensus of the surgeon, anaes­thesiologist, cardiologist, and patient, who should weigh the relative risk of bleeding with that of stent thrombosis (Level of Evidence: C).
Emergency non-cardiac surgery may occur in the presence of uncorrected significant valvular heart disease. The risk of non-cardiac surgery can be minimized by having an accurate diagnosis of the type and severity of valvular heart disease, choosing an anesthetic approach appropriate to the valvular heart disease, and considering a higher level of perioperative
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monitoring as well as managing the patient postoperatively in an intensive care unit setting.
Severe aortic stenosis (AS) is associated with a periopera­tive mortality rate of 13%, compared with 1.6% in patients without AS in previous data. The mechanism of MACE in patients with AS likely arises from the anesthetic agents and surgical stress that lead to an unfavorable hemodynamic state in terms of hypotension and tachycardia during surgery; the latter two changes are the main drivers for worse out­come and death in those patients.
Patients with moderate-to-severe valvular regurgitation undergoing non-cardiac surgery had a higher in-hospital mor­tality rate, postoperative MI, stroke, pulmonary edema, pro­longed intubation, and major cardiac arrhythmia. Predictors of in-hospital death are LVEF <55%, renal dysfunction, high sur­gical risk, and lack of preoperative cardiac medications.
Patients with moderate-to-severe valvular regurgitation undergoing non-cardiac surgery should be monitored with invasive hemodynamics and echocardiography and admitted postoperatively to an intensive care unit setting when under­going surgical procedures with elevated risk.
Patients with prosthetic valves taking vitamin K antago­nists may require bridging therapy with either unfractionated heparin or low-molecular-weight heparin, depending on the location of the prosthetic valve and associated risk factors for thrombotic and thromboembolic events. For patients with a mechanical mitral valve, regardless of the absence of addi­tional risk factors for thromboembolism, or patients with an aortic valve and 1 additional risk factor (such as AF, previ­ous thromboembolism, LV dysfunction, hypercoagulable condition, or an older-generation prosthetic aortic valve), bridging anticoagulation may be appropriate when interrup­tion of anticoagulation for perioperative procedures is required and control of hemostasis is essential.
Atrial fibrillation (AF) is the most common sustained tachyarrhythmia, particularly in older patients who are likely to be undergoing surgical procedures. Patients with a preop­erative history of AF who are clinically stable generally do not require modification of medical management or special evaluation in the perioperative period, other than adjustment of anticoagulation.

Renal System Evaluation

Acute and chronic kidney derangements are frequent in this population of patients because, in the majority of cases, the etiology of the large abdominal wall defects is from major trauma or catastrophic general surgery and abdominal vascu­lar conditions. In severely injured patients, despite advances in resuscitation, acute kidney injury (AKI) is still a frequent occurrence and remains an important predictor of multiorgan failure and mortality.
There are few perioperative measures to take into consid­eration in the management of such complex patients: preven­tion of contrast-induced nephropathy with acetylcysteine and fluid management, control of diabetes mellitus and hypertension, optimization of the fluid status of the patient, and close monitoring of aminoglycoside administration.
In the acute setting, AKI can be associated in severely burned and polytrauma patients as a result of increased intraabdominal pressure and development of the abdominal compartment syndrome (ACS), which should be recognized in a timely manner and the abdomen promptly decompressed to reverse the renal dysfunction. The use of nonsteroidal anti-inflammatory drugs (NSAIDs) should be avoided in the setting of hypoperfusion and renal dysfunction.
Another condition that is associated with AKI is rhabdo­myolysis. The management of rhabdomyolysis is to focus on the correction of the underlying cause (i.e., compartment syndrome, etc.) and undertake prompt and vigorous volume replacement. Compartment syndrome in the extremities is a clinical diagnosis, and fasciotomy of the affected limb should be performed as soon as it is recognized. The most common method used in evaluation and monitoring of renal function deterioration is measurement of the serum creatinine and blood urea nitrogen levels. Measures of glomerular filtration rate and creatinine clearance are also commonly employed. Control of urea levels can prevent platelet dysfunction and mental status changes. Optimizations of renal function in patients with AKI and chronic kidney conditions might require renal replacement therapies to obtain a good control of uremia, electrolyte disturbance such as hyperkalemia and acidosis, and fluid status.

Gastrointestinal System Evaluation

Evaluation and optimization of the entire gastrointestinal (GI) system is of major importance because derangement of GI tract continuity is a frequent complication in patients requiring abdominal wall reconstruction because of major abdominal wall defect.
Disruption in the continuity of the intestine will affect the course of management in the acute and elective reconstruction settings. Enterocutaneous fistulas remain among the most challenging complications associated with patients with open abdomen and major abdominal trauma requiring abdominal wall reconstruction. In patients undergoing major surgery, goal-directed hemodynamic therapy (GDT), by maintaining adequate systemic oxygenation, can protect organs particularly at risk of perioperative hypoperfusion and is effective in reducing GI complications as described by a recent meta-analysis.
The effort of the multidisciplinary team is to reestablish continuity of the GI tract, enabling prompt use of oral or
26 Minimizing Postoperative Complications by Preoperative Optimization
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enteral feeding to optimize the patient’s nutritional status. The authors recommended a nine-step treatment strategy in abdominal wall reconstruction in patients with an open abdomen and enterocutaneous fistulas; and this is further described in Chap. 7 of this book.

Endocrine System Evaluation

Endocrine disorders are common in critically ill patients and have a global effect on the patient’s well-being. A systematic approach to the evaluation and management of common endocrinological conditions should be under taken during the preoperative period. Examples of common endocrino­logical derangements observed in critically ill patients include sodium-level abnormalities, thyroid dysfunction, relative adrenal insufficiency, and abnormal glucose level, among others.

Hematologic and Coagulation Evaluation

Patients might have a history of hematological disorder or have become coagulopathic during the course of manage­ment of the severe clinical condition or injury, partly because of the acute major trauma insult, sepsis, acidosis, hypother­mia, or iatrogenic effects caused by heparin-induced throm­bocytopenia or chronic use of antiplatelet medications. Patient also might have a history of a hypercoagulable state, and the condition could be exacerbated during the hospitalization.

Infections

Infections are frequent in patients with an open abdomen, and source control should be obtained before embarking on abdominal reconstruction. Goal-directed therapies have improved outcomes in patients with severe sepsis and septic shock and are part of our standard of care.
a patient’s condition dictates otherwise. Our second option is the optimization of nutritional status through initiation and maintenance of parenteral nutrition. Elective abdominal wall reconstruction should be postponed in patients with a history of recent weight loss of 15% or more, along with an albumin level less than 3 g/dL. There is a strong association reported between postoperative albumin level and morbidity and mortality. Consideration should be given to addressing chronic conditions, such as chronic malnutrition; chronic alcoholism, which is associated with multivitamin deficien­cies (thiamine and folate deficiency); and electrolyte abnor­malities in sodium, magnesium, phosphorus, potassium, and calcium. In our practice, we prefer to give patients extra supplements of vitamin C, vitamin E, micronutrients such as zinc and selenium, and if clinically indicated, vitamin A.

Control of Premorbid Conditions

As previously detailed in this chapter, all chronic conditions should be addressed and optimized per current published clinical practice guidelines. These conditions include diabe­tes, hypertension, heart problems, thyroid disease, obesity (when possible), and those involving the kidney and pulmo­nary system.

Social and Addiction Issues

Patients who have suffered and survived major injuries and undergoing emergency general surgery and vascular proce­dures requiring damage control have an associated decreased quality of life. A significant number of patients have a history of chronic complications of alcohol or drug abuse, such as financial instability, homelessness, abusive behaviors, chronic and acute legal problems, and prescription drug abuse, which might require addiction and psychiatry evalua­tion and management before undergoing major abdominal wall reconstruction. Patients should be enrolled in a smoking cessation program prior to the surgical reconstruction.

Nutritional Evaluation and Optimization

The nutritional status of the patient should be considered early in the course of the management of complex condi­tions. Evaluation and optimization of the nutritional status should be performed prior to major surgical procedures (See Chap. 4). Methods include evaluation of serum albumin level, prealbumin level, and indirect calorimeter measure­ments, depending on the availability of the measure at your institution. We strongly recommend early aggressive nutri­tional support through the initiation of enteral feeding unless

Prevention Strategies

For all patients undergoing major abdominal surgery, some conditions can be prevented with a systematic approach: (1) thromboembolic complications by implementing deep venous thrombosis prophylaxis (mechanical and pharmaco­logical treatment if not contraindicated); (2) prevention of surgical site infections by timely administration of perioper­ative antibiotics; (3) prevention of GI bleeding in high-risk patients, and implementation of various published critical care bundles practiced in your institution.
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Summary

Preoperative evaluation and optimization are parts of a mul­tidisciplinary process associated with improved outcomes in patients undergoing major abdominal reconstruction proce­dures. The most frequent method of optimization in the acute setting is fluid management. Surgery of complex abdominal wall defects could be a major undertaking for any surgeon and is associated with frequent complications. Planned, sys­tematic evaluation; perioperative risk assessment; and appro­priate timing are essential for providing the best functional outcome.

Suggested Readings

1. Fleisher LA, Fleischmann KE, Auerbach AD, Barnason SA, Beckman JA, Bozkurt B, Davila-Roman VG, Gerhard-Herman MD, Holly TA, Kane GC, Marine JE, Nelson MT, Spencer CC, Thompson A, Ting HH, Uretsky BF, Wijeysundera DN, American College of Cardiology, American Heart Association. 2014 ACC/AHA guide-
line on perioperative cardiovascular evaluation and management ofpatients undergoing noncardiac surgery: a report of the American College of Cardiology/American Heart Association task force on practice guidelines. J Am Coll Cardiol. 2014;64(22):e77–13.
2. Fischer MO, Le Manach Y. Perioperative medicine: from theorical guidelines to clinical practice. Anaesth Crit Care Pain Med. 2016;35(4):241–2. doi:10.1016/j.accpm.2016.06.00.
3. Guarracino F, Baldassarri R, Priebe HJ. Revised ESC/ESA guide­lines on non-cardiac surgery: cardiovascular assessment and man­agement. Implications for preoperative clinical evaluation. Minerva Anestesiol. 2015;81(2):226–33. Epub 2014 Nov 11
4. Garcia-Miguel FJ, Serrano-Aquilar PG, et al. Preoperative assess­ment. Lancet. 2003;362:1749–57.
5. Correll DJ, Bader AM, Hull MW, et al. Value of preoperative clinic visits in identifying issues with potential impact on operating room efficiency. Anesthesiology. 2006;105:1254–9. discussion 6A
6. Lee TH, Marcantonio ER, Mangione CM, Thomas EJ, Polanczyk CA, Cook EF, et al. Derivation and prospective validation of a sim­ple index for prediction of cardiac risk of major noncardiac surgery. Circulation. 1999;100:1043–9.
7. Davis C, Tait G, Carroll J, Wijeysundera DN, Beattie WS. The revised cardiac risk index in the new millennium: a single-Centre prospective cohort re-evaluation of the original variables in 9519 consecutive elec­tive surgical patients. Can J Anaesth. 2013;60(9):855–63. doi:10.1007/
s12630-013-9988-5. Epub 2013 Jun 28

The Final Word on a Complex Problem

Rifat Latifi
27
Throughout this book, the reader will find answers to a number of questions dealing with difficult defects of the abdominal wall such as fistulas, short gut syndrome, com­plex tissue transfer, and the techniques of complex surgery to address these issues. These complex and challenging prob­lems can be organized into two segments: the acute phase of catastrophic infection(s) and or injury management of surgi­cal problems, that is dealing with closure of the abdominal wall in the acute phase, and segment two, management of the patient that has survived the acute phase and the conse­quences of acute phase management. In both phases the goals are the same: restore the functionality of the abdominal wall and return the patients to their standard way of living.
In the acute phase, when damage control surgery (DCS) is performed, temporary abdominal closure (TAC) is used. Depending on clinical indication for DCS, the surgeon has several options, most notably an intestinal bag, wound vacuum- assisted closure (VAC), or a moist gauze that serves as the “poor man’s wound VAC”. However, if the patient has enough skin and subcutaneous tissue, then closing the skin offers the best temporary closure. I avoid temporary closure of the fascia out of fear of injuring the edges of the fascia and subsequently creating a hernia and dehiscence. If the wound VAC is used, just enough pressure should be applied to maintain closure; pressures higher than 70 mmHg must clearly be avoided, especially for long periods of time. High pressures may risk creation of new fistulas in patients with an open abdomen. If at all possible, final and definitive clo­sure of the abdomen should be performed within 12–24 h after temporary closure. If not, one should attempt sequential
R. Latifi (*) Department of Surgery, Westchester Medical Center and New York Medical College, 100 Woods Road, Taylor Pavilion Building, Room D347, Valhalla, NY 10595, USA e-mail: rifat.latifi@wmchealth.org
closure that has been described by many authors in details. However, performing DCS does not mean that you have committed the patient to long-term open abdomen manage­ment, and every attempt should be made to close the fascia primarily. If and only when you are unable to definitively close the abdomen, you have to consider long-term manage­ment with eventual closure. Although numerous studies have shown that DCS is life saving, the consequences of DCS have been elucidated in recent years.
Using sequential fascial closure, Burlew et al. were able to achieve 100% fascial approximation as well as reducing the morbidity of the open abdomen and the cost of complex abdominal reconstruction or biologic mesh insertion [1]. Another important question in the management of patients undergoing DCS or damage control laparotomy (DCL), in particular, is when to use mesh repair and when to use lateral component separation (LCS). To answer this question, Sharrock et al. [2] conducted a systematic review and meta­analysis of studies that compared methods of restoration of fascial continuity when primary closure was not possible fol­lowing DCL for trauma. In their analysis, they included ran­domized controlled trials (RCTs), cohort studies, and case series that reported temporary abdominal closure (TAC) and early definitive closure methods in trauma patients undergoing DCL. After reviewing 26 studies, with mortality, days to fas­cial closure, hospital length of stay, abdominal complications, and delayed ventral herniation as outcomes they concluded that component separation or mesh repair may be valid alter­natives to delayed primary closure following a trauma DCL [2]. Others have used various modifications of VAC [3] to facilitate primary fascial closure and reduce morbidity in patients who had severe abdominal sepsis. Pliakos et al. [3] concluded that sequential fascial closure can begin once abdominal sepsis is controlled. Additionally, Cothren et al. [4] performed a modification of the vacuum-assisted closure (VAC) technique that provided constant fascial tension in order to achieve a higher rate of primary fascial closure and achieved 100% fascial approximation. Other techniques have been described as well [5, 6], to achieve closure.
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Looking into the Future: Will Tissue Engineering Be the Next Answer?

We have all become acutely aware of the need to close the abdomen as soon as possible. However, if and when one cannot use native tissue to close the defect or they are in need to use reinforcement of the repair with mesh, use of tissue engineer­ing (TE), which aims to create and substitute failing or severely injured organs, by replacing them both anatomically and func­tionally as close as possible or entirely substituting the healthy organ, is in order. TE has contributed more advancements to general and trauma surgery than any other field currently. As general and trauma surgeons or acute care surgeons we are pre­sented daily with large defects of the abdomen as well as other parts of the body that must be sealed off with newly created tissue that eventually will become part of the body and mimic fascia. This tissue has been called “biologic” and is being used to restore the functionality of abdomen. Other clinical indica­tions have emerged also and vary from creating better cosmet­ics results in breast reconstruction, reconstruction after major cranioplasties, facial reconstruction or skin coverage after major burns, or other musculocutaneous defects.
The process of TE is beyond the scope of this chapter, but suffice it to say that it has undergone time development start­ing in the early 1900s through the present day and involves cells (differentiated adult cells to undifferentiated progenitor cells and stem cells), use of scaffolds material, vasculariza­tion), and bio-fabrication [713]. What I believe is needed, is that clinicians become part of the research of various tissues and conduct multi-institutional clinical trials. However, the clinical applications of TE need to be framed ethical ques­tions such as when to conduct clinical trials, how to regulate such trials, when and how to responsibly introduce these strategies into clinical practice, and how to maintain a posi­tive public perception of the tissue-engineering field. These questions have been raised and many more will develop in the future as tissue engineering advances. It is likely that this issue will continue to be debated in the future as well, but we surgeons must lead this process and work together with other scientists interested in this complex issue.
In summary, biologic meshes are derived from human dermis, porcine dermis, porcine small intestine submucosa, bovine dermis, or bovine pericardium. Their individual use has been rationalized by many and there are strong argu­ments on each side. While their benefit has been demon­strated, although no randomized clinical trials have been conducted in the infected field, there are a number of issues with all biologic meshes. First, they are extremely expensive and their application have high recurrence rate of hernia.
Furthermore, the biology of interaction with a host is still being studied, with particular attention being paid to media­tors and the mechanism of controlling inflammatory and immune response. Nonetheless, these meshes are here to stay, and it will be up to surgeons to further study, modify,
learn more about, and finally create a product that will eventually be cheaper and more effective and will become integrated fully by the scaffold through cellular and fibrovas­cular ingrowth tissue remodeling. Finally, the AWR using biologic mesh has advanced this field significantly; however, the biggest challenging issue that continues to plague abdom­inal wall reconstruction using bioengineered materials is the extraordinary cost that simply renders it impossible to be used in the majority of the countries in the world. Hopefully, what has happened with the expansion of biologic mesh will be followed by other organs as well. My hope is that readers will find inspiration in this book. Even if this book helps to care for one patient alone, the work that so many authors and I have done in this book will be worth the contribution.

References

1. Burlew CC, Moore EE, Biffl WL, Bensard DD, Johnson JL, Barnett CC. One hundred percent fascial approximation can be achieved in the postinjury open abdomen with a sequential closure protocol. J Trauma Acute Care Surg. 2012;72(1):235–41. doi:10.1097/
TA.0b013e318236b319.
2. Sharrock AE, Barker T, Yuen HM, Rickard R, Tai N. Management and closure of the open abdomen after damage control laparotomy for trauma. A systematic review and meta-analysis. Injury. 2016;47(2):296–306. doi:10.1016/j.injury.2015.09.008.
3. Pliakos I, Papavramidis TS, Mihalopoulos N, et al. Vacuum­assisted closure in severe abdominal sepsis with or without reten­tion sutured sequential fascial closure: a clinical trial. Surgery. 2010;148(5):947–53. doi:10.1016/j.surg.2010.01.021.
4. Cothren CC, Moore EE, Johnson JL, Moore JB, Burch JM. One hundred percent fascial approximation with sequential abdominal closure of the open abdomen. Am J Surg. 2006;192(2):238–42. doi:10.1016/j.amjsurg.2006.04.010.
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Index

A
Abdominal compartment syndrome (ACS), 11, 17, 77, 78, 115, 162,
201, 221 intra-operative considerations, 202–203 loss of domain, 202 patient selection, 202 post-operative, 204 post-operative care/monitoring, 203–204 post-operative considerations, 203–204 pro-inflammatory stimulus, 201 size of defect, 202
Abdominal contour deformities, 218 Abdominal hernia, 157, 188
ACS, 201 generalized effects, 201 organ system dysfunction, 201 vena-caval pressure, 201
Abdominal reconstructive procedures, 93 Abdominal trauma index (ATI), 81 Abdominal wall closure, 11, 12, 146, 163 Abdominal wall defect repair timing, 89–90 Abdominal wall defects, 102, 103 Abdominal wall distensibility, 11–13 Abdominal wall reconstruction, 98, 116, 125, 243
abdominal cavity, 112 adhesion formation, 106 anti-adhesive characteristics, 106 biologic mesh, 71, 72 bioprosthetic meshes, 106 component separation technique, 65 composite materials, 106 costovertebral margin, 59 ECFs/ECAs, 55 epigastric region, 62 fistula resection, 63 immunologic response, 106 intercostals, 59 intraabdominal complications, 111 lateral component separation, 65 mesh-musculofascia, 112 musculofascial layer, 105 musculofascial replacement, 112 myocutaneous flap, 65 negative pressure, 112 optimization of nutrition, 57 patient factors, 105 postoperative care, 70 postoperative fistulas, 56–57 principles, 107–109 rectus abdominis, 65 refistulization, 61 sepsis control and eradication, 57
seromas, 57 surgery procedures, 105 surgical approach, 61–70 suture repair, 105 synthetic mesh reinforcement, 105 TAM, 68 VAC therapy, 58 wound care, 58
Abdominal wall reconstruction, pediatric
population abdominal wall defects, 141 anesthesia, 142 delayed closure, 146 general anesthesia, 144 hernia sac, 149 herniated bowel, 142 intestinal atresia, 144 intestines, 145 obstructing bands and adhesions, 143 povidone-iodine, 147 primary reduction and operative fascial closure, 142 rectus abdominus muscles, 143 staged closure, 146 staged reduction and closure, 143 sutureless closure, 143–144 umbilical vessels, 142 viscera, 143 visceroabdominal disproportion, 142 volvulus and ischemia, 142
Abdominoplasty, 213–218 Absorbable mesh, 9 Absorbable synthetic polymers, 190 ABThera (TM), 116 Acellular dermal matrix (ADM), 68 Adhesiolysis, 62–63 American College of Cardiology/American Heart Association
(ACC/AHA), 244 bleeding, 245 guideline, 244 hemodynamic state, 246 IHD, 244 non-cardiac surgery, 245 P2Y
platelet receptor–inhibitor therapy, 245
12
patient age, 245 PCI, 245 perioperative antiplatelet therapy, 245 preoperative coronary angiography, 245 valvular regurgitation, 246 vitamin K antagonists, 246
American College of Surgeons National Surgical Quality
Improvement Program, 9
American Society of Anesthesiologists (ASA), 243
R. Latifi (ed.), Surgery of Complex Abdominal Wall Defects, DOI 10.1007/978-3-319-55868-4
251© Springer International Publishing AG 2017
252
Index
Anatomy and physiology of the abdominal wall
abdominal hernia, 14 abdominal wall hernia, 14 anterior abdominal wall, 12 fascia, 11 musculofascial structure, 12
viscera, 11 Anemia, 32 Annals of Surgery, 7 Anterior abdominal wall, 116, 117 Anterior component separation (ACS), 67, 127, 136 Anterior rectus turnover flap, 120 Anteromedial portion, 102 Antibiotics
dressings, 210
host immune cells, 208
and wound drainage, 209 Aortic stenosis (AS), 246 Aponeurosis, 118 Arteriovenous (AV) loop, 102, 103 Atrial fibrillation (AF), 246 Aulus Cornelius Celsius in Rome, 141
B
Barker’s vacuum-packing technique, 116 Biologic mesh, 193 Biologic prosthetics
classification, 188 Biologic prosthetics (Grafts), 190 Biologic tissue matrix, 163 Bioprosthetic mesh
animal and clinical studies, 106
bacterial contamination, 110
clinical experience, 106
fascial closure technique, 106
fascial defect, 108
fistulization, 106
incisional hernia repair, 106
indications, 106
initial musculofascial replacement, 112
musculofascial edge, 107
musculofascial reconstruction, 106, 107
patient selection, 107
primary fascial closure, 108
rectus muscle, 109
regeneration, 106
synthetic mesh, 106 Bioprosthetic meshes, 106 Blind Veress needle, 175 Bowel adaptation, 229, 231, 232 Bridge mesh placement, 194, 196 Butler’s MICS technique, 110
C
Calcineurin inhibitors (CNI), 160 Cardiovascular system evaluation, 244–246 Catastrophic intra-abdominal sepsis, 96 Cheatle–Henry approach, 171 Chemical component sepration, 134–135 Child-Turcotte-Pugh score, 159 Chronic anemia, 97 Chronic liver disease, 155, 158–159 Chronic obstructive pulmonary disease (COPD), 133 Comparing anterior component separation techniques, 129
Complex abdominal wall (CAW), 60 Complex abdominal wall defect (CAWD), 55
complications, 187 isolation, 187 management, 187
Complex abdominal wall reconstruction
abdominal cavity, 30 abdominal wall, 30 age, 32 anemia, 32 biologic and mechanical pathways, 30 biomaterials, 29 causes, 27–31 collagen, 31 DC/OA surgery, 29 diabetes, 32 Fibroblasts and myofibroblasts, 31 growth factors, 31 hematomas, 32 infections, 32 inflammation, 31 irradiation, 32 laparotomy wound healing, 31 maturing adhesions, 33 nutrition, 32 OA, 27 obesity, 33 sutures, 32 tissue type, 32 wound infection, 28
wound management, 27 Complex surgical procedures, 3 Complications in abdominal plastic surgery,
218–220
Component separation, 67, 109, 110, 116, 118, 149
Butler’s MICS technique, 110
fascial edges, 110
fasciocutaneous flaps, 111
healing scenarios, 110
linea semilunaris, 109
medialization, 109
microporous foam, 110
midline skin incision, 110
oblique aponeuroses, 109
pedicled flap, 111
recipient vessels, 111
revascularized mesh, 110
subcutaneous access tunnels, 109
subcutaneous skin flaps, 109
“U” stitches, 110 Conservative treatment
surgical removal, 209 Continuous ambulatory peritoneal dialysis
(CAPD), 159 Coronary artery bypass grafting (CABG), 244 Cortisone, 160 Cosmetic outcome, 150 Crohn’s disease, 88
D
Damage control (DC) laparotomy, 29 Damage control laparotomy (DCL), 87, 249 Damage control surgery (DCS), 4, 17, 18, 77, 249 Decision-making algorithms, 158 Decision-making process (DMP), 3