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282 L. Cattin et al.
Challenges in Meeting Nutritional Needs Post-Surgery
Postoperative nutrition poses challenges, especially in patients undergoing abdominal surgery, due to factors such as the risk of anastomotic leakage and the use of
opioids for pain management, which can slow intestinal motility. There are absolute
contraindications to enteral feeding, including severe shock requiring high levels of
catecholamines, severe intestinal bleeding, intestinal obstruction, intestinal ischemia, and high-output fistula. Barring these conditions, oral hydration can typically
resume postoperatively, and oral feeding can be reintroduced within 24 h [
meta-analysis from 2016, encompassing 15 studies comparing early vs late postoperative feeding in patients undergoing abdominal surgery (including esophageal
interventions), demonstrated no significant differences in complications such as
anastomotic leaks, pneumonia, reoperation, or mortality. Instead, it showed a significantly reduced hospitalization duration in early feed patients [19]. Similarly, a
Cochrane review [20] demonstrated that early nutrition is associated with reduced
mortality. If surgery precludes feeding in the first 5 postoperative days or if intake is
expected to be less than 50% for more than 7 days, the European Society for Clinical
Nutrition and Metabolism (ESPEN) recommends integrating nutrition via the enteral
route. If enteral feeding is not feasible or does not meet 50% of nutritional needs,
parenteral support should be considered. The use of nasojejunal tubes or
jejunostomy (NCJ) is reserved for malnourished patients undergoing upper gastrointestinal or pancreatic surgery, especially in esophageal surgery, where the loss of
the lower esophageal sphincter increases the risk of aspiration [21]. Despite the
recognized importance of nutrition in the postoperative period, a recent prospective
observational study conducted by the American Society for Parenteral a nd Enteral
Nutrition (ASPEN) observed that in the first postoperative week, nutritional targets
of 25 kilocalories per kilogram per day were not achieved in 82% of patients, with
90% failing to reach protein targets. This underscores the need for improved
strategies to address nutritional deficiencies in the postoperative period [22].
15]. A
Strategies for Enhancing Nutritional Intake and Absorption
To optimize nutritional intake, particularly in patients receiving enteral nutrition
(EN), it is beneficial to gradually increase daily EN intake to enhance intestinal
tolerability. Formulations with low fiber and fat content and high carbohydrates are
more easily digestible. Prokinetic drugs such as erythromycin or metoclopramide
can be useful for enhancing gastrointestinal motility (gastric residual volume
>500 ml/6 h). If EN fails to achieve nutritional targets, consideration should be
given to total parenteral nutrition (TPN). Indeed, starting TPN early (POD3 vs 7) is
associated with fewer infectious complications, as highlighted by a 2022 study. It is
noteworthy that nutritional status influences the risk of infection more than the use of
parenteral nutrition itself [
Lastly, proper anesthesiological management can
7, 21].
24 Nutrition in Major Surgery, Intestinal Failure, and Open Abdomen 283
improve patient compliance with nutrition. Avoiding intraoperative overhydration
reduces postoperative ileus, and the use of epidural anesthesia reduces opioid usage
and appears to modulate insulin resistance by promoting oxidative glucose use rather
than protein use [
23].
Intestinal Failure: Nutritional Challenges and Management
Definition and Causes of Intestinal Failure
Intestinal failure (IF) is a multifaceted condition characterized by the intestine’s
incapacity to adequately fulfill its digestive and absorptive functions, resulting in the
malabsorption of nutrients, water, and electrolytes [24]. This deficiency often mandates the administration of parenteral nutrition to uphold life and achieve nutritional
equilibrium [5]. The normal progression of bodily growth and the maintenance of
metabolic homeostasis depend on a fully functional intestine, which facilitates the
absorption of essential substances. In cases of intestinal failure, all intestinal functions are compromised or absent , rendering the intestine insufficient to sustain life,
thus necessitating intravenous supplementation [
intestinal insufficiency, where diminished absorption does not mandate supplementation to sustain health and developmental processes. Malnutrition is frequently
underestimated, particularly in the ICU [25]. However, the profound impacts of
intestinal failure on critically ill patients are progressively gaining recognition
[26]. IF is categorized into three distinct clinical classes, aiding in our understanding
of disease severity and facilitating targeted nutrition support, as depicted in
Table 24.2. Additionally, IF [26] can be further categorized based on the timing of
presentation, speed of onset, underlying pathology, tract affected, and duration, as
illustrated in Table 24.1. The causes of intestinal failure are summarized in
Table 24.3.
5]. It is crucial to discern IF from
Table 24.1 Categories of intestinal failure
Presentation Onset Pathology Tract affected Duration
Congenital Rapid Benign GI tract Short term
Acquired Prolonged Malignant Systemic disease Long term
Table 24.2 Clinical classes of intestinal failure
Type Description
Type I Acute, short
Type II Prolonged acute condition, often in metabolically unstable patients, requiring intrave-
Type
II
I
nous supplement over weeks or months
Reversible or irreversible
over months or years
term, self-limiting
chronic condition, in a stable patient requiring IV supplement
284 L. Cattin et al.
Table 24.3 Causes of intestinal failure
Cause Description
Short bowel syndrome
(SBS)
Intestinal dysmotility
disorders
Congenital disorders Congenital anomalies of the intestine, such as microvillus inclusion
Mucosal disorders Conditions affecting the integrity of the intestinal mucosa, such as
Vascular disorders Ischemic insults to the intestine, either acute (e.g., mesenteric ische-
Functional disorders Functional disorders of the intestine, including chronic diarrhea syn-
SBS is the most common cause of intestinal failure and occurs when a
significant portion of the small intestine is surgically removed or
functionally impaired due
mic bowel disease, or mesenteric infarction
Conditions such as chronic intestinal pseudo-obstruction (CIPO) and
gastroparesis can impair intestinal motility, leading to inadequate
transit of food and nutrients through the digestive tract
disease and tufting enteropathy, can result in intestinal failure due to
structural or functional abnormalities
radiation enteritis, chemotherapy-induced mucositis, and inflammatory
bowel disease, can impair nutrient absorption and lead to intestinal
failure
mia) or chronic (e.g., chronic mesenteric ischemia), can compromise
blood flow to the intestine, resulting in tissue damage and functional
impairment
dromes and refractory malabsorption, can contribute to intestinal failure by disrupting normal absorption processes
to disease, such as Crohn’s disease, ische-
Table 24.4 Histological findings observed in intestinal failure-associated liver disease
Intestinal failure-associated liver disease
Cholestasis Yes
Steatosis type Macro-vesicular and micro-vesicula
Steatosis
location
Biliary tree
changes
Steatohepatitis Rare
Fibrosis Jigsaw
Periportal area
Obstruction: Portal inflammation, edema, ductal
pattern: Commences at portal end, then periportal followed by portal-
portal bridging fibrosis then cirrhosis
r
proliferation ductopenia
Impact of Intestinal Failure on Nutritional Status
IF is a condition that not only affects patients physically but also psychologically,
often resulting in prolonged stays in the ICU and hospital, accompanied by challenging complications requiring a multidisciplinary approac h due to its propensity to
cause multiorgan dysfunction [5]. Liver disease, while less common in adults
compared to children, affects less than 5% severely. It is linked to intrahepatic
inflammation, steatosis, hepatitis, nutrient deficiencies, excess lipids, glucose, proteins, medications, bacterial overgrowth, parenteral nutrition components, and heavy
metals [27]. Histological findings are summarized in Table 24.4.
24 Nutrition in Major Surgery, Intestinal Failure, and Open Abdomen 285
Vitamin D deficiency can lead to metabolic bone disease and osteoporosis, while
nephrolithiasis is a known complication related to dehydration. These complications
can be mitigated by ensuring enteral intake, promptly replacing nutrients, utilizing
cyclical parenteral nutrition, avoiding lipid-based calorie intake, incorporating triglycerides (medium and long chain), and preventing sepsis [
28].
Malnutrition weakens respiratory muscles, predisposing individuals to respiratory complications and aspiration of gastric contents. Patients with IF are often
deemed feeding intolerant, although a clear definition of feeding intolerance is
lacking. It can be characterized by the interruption of enteral nutrition due to a
large gastric residual volume, abdominal discomfort, distension, emesis, or diarrhea
[29]. This is observed in at least 30.5% of critically ill patients, especially those
mechanically ventilated for over 72 h. A large residual volume is defined as
>250 ml, highly predictive of delayed emptying, though the threshold is unclear.
This condition translates into impaired outcomes, increased mortality, and prolonged
hospital length of stay [
30].
Nutritional Management Strategies for Patients with Intestinal Failure
A malnourished patient experiences impaired immune respon se and delayed wound
healing. Managing these patients necessitates a multidisciplinary approach, both in
the ICU and in pre- and postoperative surgical settings, which can enhance patient
survival and reduce healthcare costs [31]. The primary goal of this approach is to
mitigate the severity of IF, prevent complications, and provide appropriate treat ment
while prior itizing quality of life. After differentiating between subtypes based on
severity and duration, the next step involves addressing the underlying causes and
metabolic derangements contributing to the failure, with a focus on improving
overall well-being. ESPEN [
guidelines emphasize the importance of managing
32]
septic events, maintaining fluid and electrolyte balance, and wound care. While
specific protocols to improve gastrointestinal function and enhance survival rates are
lacking, nutritional support should aim to meet metabolic demands and be tailored to
individual needs to optimize oral intake [32]. Initiating gastric, jejunal, or parenteral
nutrition may be necessary if oral intake is insufficient. However, it is crucial to
avoid overfeeding, as it can lead to complications such as cholestasis and catheterrelated bloodstream infections. The enteral route is preferred initially, as it helps
maintain mucosal integrity and preserves the microbiome. In patients at high risk of
aspiration and feeding intolerance, transitioning to the post-pyloric route may be
benefi
cial. The use of prokinetic drugs like metoclopramide, domperidone, and
erythromycin lacks robust evidence. Combining metoclopramide and erythromycin
may prolong their effects, while neostigmine is more effective in treating colonic
paralysis. Although evidence for the use of lactulose to prevent GI paralysis is
limited, it is often recommended in clinical practice.
286 L. Cattin et al.
Role of Parenteral Nutrition and Enteral Nutrition in Intestinal Failure Cases
Ensuring adequate nutrition support is paramount in clinical management, with TPN
serving as a vital therapeutic option [33]. However, TPN entails inherent risks that
necessitate individualized prescription to mitigate potential adverse effects and
optimize nutritional therapy. Patients afflicted by short bowel syndrome (SBS),
especially in severe cases, often require long-term home parenteral nutrition
(HPN) upon stabilization, as prolonged hospitalization is not feasible. SBS can
arise from surgical complications, malignancies, bowel resections, or dysmotility.
The primary indication for HPN varies across regions; for instance, in the UK, it is
predominantly for Crohn’s disease, whereas in the USA and Japan, it is cancer. In
Canada, SBS ranks highest, followed by cancer and surgical complications. Vigilant
monitoring of electrolytes, vitamins, fluid, glucose, sodium, potassium, magnesium,
calcium, and phosphate levels is essential to prevent life-threatening complications
like refeedi ng syndrome. Enteral nutrition offers notable advantages, including
reduced infection risks by bolstering gut barrier function, although the evidence
remains limited. The elevated infection risk associated with TPN may stem from
inadequate vascular catheter care, predisposing overfed patients to bloodstream
infections or hyperglycemia-associated sepsis. Enteral nutrition should be the preferred route unless contraindicated, as in cases of enteral fistulas, obstruction,
mucosal diseases, or short bowel [34]. Research on intestinal failure has predominantly centered on pediatric cases [35], resulting in limited data for adult
populations. Patients grappling with chronic intestinal pseudo-obstruction are
advised to ingest food based on tolerance levels to alleviate symptoms and maintain
nutritional adequacy. Dietary adjustments, encompassing a low lactose, fat, and fiber
regimen, are advocated to optimize intestinal motility and mitigate bacterial overgrowth. Multivitamin and micronutrient supplements play a crucial role in averting
deficiencies, while prokinetics may ameliorate dysmotility [36]. Enteral nutrition
should precede parenteral nutrition, particularly in patients facing oral intake challenges and weight loss and in cases of inadequate oral nutrition due to radiation
enteritis. Timely initiation of parenteral nutrition is imperative in patients contending
with pseudo-obstruction, motility dysfunction, and radiation enteritis, especially
when enteral nutrition proves untenable or insufficient—a common scenario in
small bowel disease characterized by structuring and fistulizing pathology, frequent
surgical complications, pancreatic insufficiency, and bacterial overgrowth [
37].
Open Abdomen: Nutritional Support and Wound Healing
Overview o
The open abdomen, also known as laparostomy, is a surgical technique where the
abdominal cavity rema ins open following surgery, typically due to severe abdominal
pen Abdomen Condition and Its Implications
f O
24 Nutrition in Major Surgery, Intestinal Failure, and Open Abdomen 287
trauma, compartment syndrome, or intra-abdominal sepsis [38]. It serves to alleviate
intra-abdominal pressure and aid ongoing management, but it introduces challenges
for wound care and infection control [39]. One significant concern is the risk of
abdominal compartment syndrome, which can compromise organ function by
increasing intra-abdominal pressure [40]. Additionally, the exposed abdominal
contents heighten the risk of infection, demanding meticulous wound care and
infection prevention measures. Nutritional support plays a critical role in promoting
tissue repair and wound healing in patients with open abdomens [
meeting nutritional needs can be complex due to increased metabolic demands and
protein losses associated with the condition. Managing the open abdomen requires a
coordinated effort among surgeons, intensivists, and wound care specialists. Monitoring fluid balance, nutritional status, wound healing progress, and infection
prevention measures are essential components of effective management. Overall,
navigating the challenges of the open abdomen
sive approach to optimize patient outcomes [
condition necessitates a comprehen-
41].
6]. However,
Nutritional Requirements for Patients with Open Abdomen Wounds
Patients with open abdomen wounds face unique nutritional challenges due to
increased metabolic demands, protein losses, and the need for tissue repair. Adequate nutrition is essential to support wound healing and minimize complications
associated with the open abdomen condition [42].
Protein
open abdomen wounds may experience significant protein losses due to wound
exudate and catabolic processes. Therefore, protein intake should be increased to
meet the heightened demands of tissue repair and maintenance. Current recommendations suggest a protein intake of 1.5–2 g per kilogram of body weight per day for
patients with open abdomen wounds [15, 16, 32
ments is essential to support metabolic processes and promote wound healing.
Patients with open abdomen wounds often experience increased metabolic demands
due to the stress response associated with trauma and surgery. Therefore, adequate
caloric intake is necessary to prevent energy depletion and support tissue repair.
Caloric requirements should be individualized based on factors such as age, weight,
metabolic rate, and degree of injury [
with open abdomen wounds may require supplementation with micronutrients
essential for wound healing, such as vitamins A, C, and E, zinc, and selenium
[43]. These micronutrients play key roles in collagen synthesis, immune function,
and antioxidant defense mechanisms. Micronutrient supplementation should be
tailored to the specific needs of each patient and monitored closely to prevent
deficiencies or excesses [
for wound healing and overall patient recovery. Patients with open abdomen wounds
requirement is crucial for tissue repair and regeneration. Patients with
However, meeting energy require-
].
16, 41].
Adequate hydration and electrolyte balance are critical
43].
In addition to macronutrients, patients
288 L. Cattin et al.
Table 24.5 Nutritional requirements for patients with open abdomen wounds
Nutritional requirement Description
Increased metabolic
demands
Protein requirements Essential for tissue repair, collagen synthesis, and immune function.
Micronutrient needs Adequate intake of vitamins and minerals is crucial for wound healing,
Fluid and electrolyte
balance
Enteral vs. parenteral
nutrition
Monitoring and
assessment
Patients experience elevated metabolic demands
wound healing, and inflammation. Adequate energy intake is necessary for cellular metabolism and tissue repair
Significant protein losses occur due to wound exudate and catabolic
responses, necessitating sufficient intake to prevent muscle wasting
immune function, and tissue regeneration. Deficiencies in
micronutrients like vitamins C and A, zinc, and iron impair wound
healing
Significant losses occur through wound drainage, necessitating balanced intake to prevent dehydration, electrolyte imbalances, and
complications like renal dysfunction
Enteral nutrition is preferred when feasible, maintaining gut integrity
and reducing infectious risks. Total parenteral nutrition may be necessary when enteral feeding is contraindicated or insufficient
Regular monitoring of clinical parameters, laboratory values, and
nutritional markers is essential to evaluate adequacy, identify deficiencies, and adjust nutritional support accordingly
due to surgery,
may experience fluid losses through wound exudate and increased insensible losses
due to the open wound. Close monitoring of fluid intake and output, electrolyte
levels, and renal function is essential to prevent dehydration, electrolyte imbalances,
and renal complications [41, 44]. Close collaboration between surgeons, intensivists,
dietitians, and wound care specialists is essential to optimize nutritional support and
promote wound healing in patients with open abdomen wounds (Table
24.5).
Challenges in Providing Nutritional Support to Patients with Open Abdomen
Delivering adequate nutritional support to patients with open abdomen wounds
presents several challenges. One significant challenge is the risk of complications
associated with the open wound, such as infection and wound dehiscence. The
exposed abdominal contents increase the risk of bacterial contamination, necessitating meticulous wound care and infection prevention measures [45
presence of the open abdomen can lead to increased protein losses, fluid shifts, and
metabolic disturbances, further complicating nutritional management. Another challenge is the variability in patients’ nutritional requirements and clinical status, which
may fluctuate over the course of treatment. Individualizing nutrition therapy based
on factors such as age, weight, metabolic rate, and degree of injury becomes crucial
but can be challenging to assess and monitor effectively in the critical care setting.
Moreover, logistical constraints, such as limited enteral access or intolerance to oral
].
Additionally, the
24 Nutrition in Major Surgery, Intestinal Failure, and Open Abdomen 289
feeding, may necessitate alternative routes of nutrition delivery, such as NPT, adding
complexity to the nutritional care plan. Addressing these challenges requires a
multidisciplinary approach, close collaboration between healthcare providers, and
regular assessment and adjustment of the nutritional regimen to optimize patient
outcomes and promote wound healing.
Clinical Protocols and Guidelines for Nutritional Support
Nutritional support is integral to the care of patients undergoing major surgery,
experiencing intestinal failure, or managing open abdomen conditions. Clinical
protocols and guidelines are fundamental frameworks that guide healthcare professionals in providing optimal nutritional care. Preoperative assessment is paramount, involving a comprehensive evaluation of nutritional status to identify
deficiencies or malnutrition risks. Intraoperatively and postoperatively, strategies
such as early enteral feeding and tailored parenteral nutrition aim to meet energy and
nutrient requirements while minimizing complications. In cases of intestinal failure,
collaborative efforts among specialists emphasize enteral nutrition to preserve gut
function and prevent metabolic derangements associated with parenteral nutrition.
Open abdomen conditions necessitate meticulous wound care and adequate nutritional support to promote tissue repair and minimize infection risks. A
multidisciplinary approach, encompassing surgeons, dietitians, and nursing staff,
ensures comprehensive nutritional management and ongoing monitoring of patients ’
nutritional status. By adhering to evidence-based practices and fostering collaboration, clinical protocols empower healthcare providers to optimize patient outcomes
and promote recovery in diverse surgical settings.
Conclusions
In conclusion, the role of nutrition in the recovery process of patients undergoing
major surgery, managing intestinal failure, or c oping with open abdomen conditions
cannot be overstated. Adequate nutrition is fundamental for supporting healing
mechanisms, enhancing immune function, and facilitating tissue repair, thereby
significantly improving surgical outcomes. Throughout this chapter, we have
underscored the importance of tailored nutritional interventions in optimizing patient
outcomes and facilitating the healing process across diverse surgical scenarios.
From preoperative nutritional assessments to postoperative care and management
of complex conditions like intestinal failure and open abdomen, a multidisciplinary
approach is essential. Nutritional support should be individualized based on patients’
specific needs, clinical circumstances, and metabolic demands. Monitoring nutritional status, fluid balance, wound healing progress, and infection prevention measures are critical components of effective management.
290 L. Cattin et al.
Clinical protocols and guidelines provide fundamental frameworks that guide
healthcare professionals in delivering optimal nutritional care. By integrating
evidence-based practices and fostering collaboration among surgeons, dietitians,
nursing staff, and other specialists, healthcare providers can optimize patient outcomes, enhance recovery trajectories, and promote overall well-being. Moving
forward, continued research and advancements in nutritional science will further
refine our understanding of optimal nutritional strategies in surgical settings.
Embracing a patient-centered approach and staying abreast of emerging evidence
will empower healthcare providers to navigate the complexities of surgical care and
ensure the best possible outcomes for their patients.
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