Intra-abdominal Hypertension In Patients Research Articles

The relationship between fluid resuscitation and intra-abdominal hypertension in patients with blunt abdominal trauma.

Background:Excessive fluid administration for saving patients from hypovolemic shocks is one of the main causes of intra-abdominal hypertension (IAH) and abdominal compartment syndrome (ACS). The purpose of this paper is to survey the relationship between fluid resuscitation and increase intra-abdominal pressure (IAP).Materials and Methods:The present descriptive-analytical study recruited 100 patients with confirmed abdominal trauma and presenting to emergency departments. The cases with high IAP measured through the bladder were identified as developing ACS in case of having comorbidities involving two of the following systems: respiratory system, renal system or cardiovascular system. The volume of the fluids administered was compared in the first 24 h in subjects with and without ACS.Results:Of 100 patients with abdominal trauma, whose IAP was measured, 28 cases developed ACS. The mean volume of the fluids received was found to be significantly higher in the patients with ACS (8772 ml) compared to in those without (5404 ml). As a complication of excessive fluid administration, IAH can seriously threaten the patient's life.Conclusions:Excessive fluid resuscitation causes ACS among the critically ill or injured patients such as abdominal trauma, pelvic fracture and intra-abdominal organ injuries hence to prevent this complication in all patients requiring short-term excessive administration of fluids, great care, and sensitivity are required to constantly control IAP and adjust the fluid administration.

Prognosis of intraabdominal hypertension in patients with severe acute pancreatitis

A nivel cerebral, el amiloide-beta participa en la fisiopatología de trastornos cognitivos; en la circulación, el papel del amiloide-beta es incierto pero podría estar relacionado con procesos de inflamación estéril y senescencia. Se ha analizado la relación entre concentraciones circulantes de amiloide-beta 1-40 (Aβ40), cognición y mortalidad (global, cardiovascular y por insuficiencia cardiaca [IC]) en pacientes ambulatorios con IC.El Aβ40 circulante se midió en 939 pacientes consecutivos con IC. El estado cognitivo se evaluó con el cuestionario de Pfeiffer (ajustado al nivel educacional) en condiciones basales y durante el seguimiento. Se utilizaron análisis de regresión múltiple de Cox y medidas de función (discriminación, calibración y reclasificación), ajustando por riesgos competitivos para causas de muerte específicas.Durante 5.1 ± 2.9 años, 471 pacientes murieron: 250 de causa cardiovascular y 131 por IC. La mediana de Aβ40 circulante fue de 519,1 pg/ml [Q1-Q3: 361,8-749,9 pg/ml]. La concentración de Aβ40 correlacionó con la edad, índice de masa corporal, insuficiencia renal y clase funcional de la New York Heart Association (todas p < 0,001). No hubo diferencias en Aβ40 en pacientes con y sin trastorno cognitivo a nivel basal (p = 0,97) o durante el seguimiento (p = 0,20). En el análisis multivariado, que incluye predictores clínicos relevantes y la fracción aminoterminal del propéptido natriurético cerebral, Aβ40 permaneció asociado a mortalidad global (HR = 1,22; IC95%, 1,10-1,35; p < 0,001) y cardiovascular (HR = 1,18; IC95%, 1,03-1,36; p = 0,02), pero no con mortalidad por IC (HR = 1,13; IC95%, 0,93-1,37; p = 0,22). El Aβ40 circulante mejoró la calibración y reclasificación de los pacientes.Las concentraciones circulantes de Aβ40 no se asocian a trastorno cognitivo en la IC. Aβ40 fue predictor de mortalidad y podría indicar envejecimiento sistémico.In the brain, amyloid-beta generation participates in the pathophysiology of cognitive disorders; in the bloodstream, the role of amyloid-beta is uncertain but may be linked to sterile inflammation and senescence. We explored the relationship between blood levels of amyloid-beta 1-40 peptide (Aβ40), cognition, and mortality (all-cause, cardiovascular, and heart failure [HF]-related) in ambulatory patients with HF.Bloodstream Aβ40 was measured in 939 consecutive patients with HF. Cognition was evaluated with the Pfeiffer questionnaire (adjusted for educational level) at baseline and during follow-up. Multivariate Cox regression analyses and measurements of performance (discrimination, calibration, and reclassification) were used, with competing risk for specific causes of death.Over 5.1 ± 2.9 years, 471 patients died (all-cause): 250 from cardiovascular causes and 131 HF-related. The median Aβ40 concentration was 519.1 pg/mL [Q1-Q3: 361.8-749.9 pg/mL]. The Aβ40 concentration correlated with age, body mass index, renal dysfunction, and New York Heart Association functional class (all P < .001). There were no differences in Aβ40 in patients with and without cognitive impairment at baseline (P = .97) or during follow-up (P = .20). In multivariable analysis, including relevant clinical predictors and N-terminal pro-B-type natriuretic peptide, Aβ40 remained significantly associated with all-cause death (HR, 1.22; 95%CI, 1.10-1.35; P < .001) and cardiovascular death (HR, 1.18; 95%CI, 1.03-1.36; P = .02), but not with HF-related death (HR, 1.13; 95%CI, 0.93-1.37; P = .22). Circulating Aβ40 improved calibration and patient reclassification.Blood levels of Aβ40 are not associated with cognitive decline in HF. Circulating Aβ40 was predictive of mortality and may indicate systemic aging.Full English text available from: www.revespcardiol.org/en

SURGICAL CORRECTION OF GASTROSCHISIS AND OMPHALOCELE IN NEWBORNS WITH REGISTRATION OF ABDOMINAL PRESSURE LEVEL

Aim of the study is an improvement of the treatment results in newborns with omphalocele and gastroschisis.Material and methods. Results of a diagnostic and treatment of 68 newborns with omphalocele (19 patients) and gastroschisis (49 patients) have been analyzed. Results of dimension of intraabdominal pressure, level of SaO2 and indicators of resperation function have been represented in 10 patients with omphalocele and 15 patients with gastroschisis. A simple method of measuring of intraabdominal prerssure by catheter Foley in bladder used in patients.Results. Direct correlation between a level of intraabdominal hypertension, indicators of SaO2 and respiratory system and degree of viscero - abdominal disproportion has been found in this study. It has been proved that there is abdominal compartment syndrome develop under high intraabdominal hypertension in patients with omphalocele and gastroschisis. Abdominal compartment syndrom exert negative influence on results of surgical treatment this patients. Early diagnostic of intraabdominal hypertension in newborns with congenital diseases of front abdominal wall allows to choose the adequate method of the plastics of abdominal wall. Surgical procedures for this newborns must be methods, which increase the volume of abdominal cavity.Conclusions. Level of the intraaddominal pressure must be evidence to choice treatment tactic and method of surgical correction in newborns with congenital anomalies of front abdominal wall. Surgical procedures must be directed at increasing of volume of abdominal cavity and removing of viscero-abdominal disproportion in newborns with omphalocele and gastroschisis.

Role of endosurgical procedures in the correction of intraabdominal hypertension in patients with severe acute pancreatitis

Role of endosurgical procedures in the correction of intraabdominal hypertension in patients with severe acute pancreatitis

Intra-abdominal hypertension and abdominal compartment syndrome in pancreatitis, paediatrics, and trauma.

Intra-abdominal hypertension (IAH) is an important contributor to early organ dysfunction among patients with trauma and sepsis. However, the impact of increased intra-abdominal pressure (IAP) among pediatric, pregnant, non-septic medical patients, and those with severe acute pancreatitis (SAP), obesity, and burns has been studied less extensively. The aim of this review is to outline the pathophysiologic implications and treatment options for IAH and abdominal compartment syndrome (ACS) for the above patient populations. We searched MEDLINE and PubMed to identify relevant studies. There is an increasing awareness of IAH in general medicine. The incidence of IAH and, to a lesser extent, ACS is high among patients with SAP. IAH should always be suspected and IAP measured routinely. In children, normal IAP in mechanically ventilated patients is approximately 7 ± 3 mm Hg. As an IAP of 10-15 mm Hg has been associated with organ damage in children, an IAP greater than 10 mm Hg should be considered IAH in these patients. Moreover, as ACS may occur in children at an IAP lower than 20 mm Hg, any elevation in IAP higher than 10 mm Hg associated with new organ dysfunction should be considered ACS in children until proven otherwise. Monitor IAP trends and be aware that specific interventions may need to be instituted at lower IAP than the current ACS definitions accommodate. Finally, IAH and ACS can occur both in abdominal trauma and extra-abdominal trauma patients. Early mechanical hemorrhage control and the avoidance of excessive fluid resuscitation are key elements in preventing IAH in trauma patients. IAH and ACS have been associated with many conditions beyond the general ICU patient. In adults and in children, the focus should be on the early recognition of IAH and the prevention of ACS. Patients at risk for IAH should be identified early during their treatment (with a low threshold to initiate IAP monitoring). Appropriate actions should be taken when IAP increases above 20 mm Hg, especially in patients developing difficulty with ventilation. Although on-operative measures should be instituted first, one should not hesitate to resort to surgical decompression if they fail.

Analysis on curative effect of intra-abdominal hypertension in patients with severe acute pancreatitis treated by laparoscopic surgery

Objective To explore the importance of monitoring intra-abdominal hypertension (IAH)through bladder and early application of laparoscopic techniques for the patients with severe acute pancreatitis (SAP).Methods Data of intra-abdominal pressure (IAP) from 201 SAP patients hospitalized in the past 12 years was observed and 60 cases (IAP＞25 mmHg)were included.According to the order of admission,patients were randomly divided into singular group (observation) and dual groups (control) (n=30).Group A was treated by laparoscopic irrigation,drainage and removing necrotic tissue,while the group B was given traditional comprehensive treatment including dual fast,gastrointestinal decompression,resistance to infection,somatostatin and laparotomy in case of abdominal abscess formation.Results Case fatality rate in the two groups were 16.7％ and 23.3％ respectively and concurrent arterial occlusive diseases (AODs) rate were 10.0％ and 20.0％.For the complications and prognosis,IAH duration and hospitalization time in group A were significantly shortened (P＜0.05)while abdominal cavity infection rate was decreased obviously (P＜0.05) compared with those of group B.Hemorrhagic infection incidence and mortality rate in group A were also reduced (P＜0.05).Conclusion Once SAP diagnosis established (IAP＞25mmHg),early treatment by laparoscopic irrigation,drainage and removing necrotic tissue via peritoneal outside diameter should be conducted. Key words: Severe acute pancreatitis (SAP); Laparoscope; Intra-abdominal pressure (IAP)

Intra-abdominal hypertension and acute pancreatitis

Intra-abdominal hypertension (IAH) contributes to organ dysfunction and leads to the development of the abdominal compartment syndrome (ACS). IAH and ACS are relatively frequent findings in patiens with severe acute pancreatitis (SAP) and are associated with deterioration in organ functions. The most affected are cardiovascular, respiratory and renal functions. The incidence of IAH in patients with SAP is approximately 60-80%. There is an accumulating evidence in human and animal studies that changes of perfusion, particularly to the microvasculature, are crucial events in the progression of acute pancreatitis (AP). The perfusion of the small and large intestine is impaired due to reduced arterial pressure, increased vascular resistence and diminished portal blood flow. Bacterial translocation has been described in patients with ACS, and this may apply to patients with SAP. Approximately 30-40% of SAP patients develop ACS because of pancreatic (retroperitoneal) inflammation, peripancreatic tissue edema, formation of fluid collections or abdominal distension. Surgical debridement was the preferred treatment to control necrotizing pancreatitis in the past. However, the management of necrotizing pancreatitis has changed over the last decade. The main objective of this article is to describe the association between IAH and AP and to emphasize this situation in clinical praxis as well (Fig. 1, Ref. 38).

Effect of mechanical ventilation on intra-abdominal pressure in critically ill patients without other risk factors for abdominal hypertension: an observational multicenter epidemiological study.

BackgroundMechanical ventilation (MV) is considered a predisposing factor for increased intra-abdominal pressure (IAP), especially when positive end-expiratory pressure (PEEP) is applied or in the presence of auto-PEEP. So far, no prospective data exists on the effect of MV on IAP. The study aims to look on the effects of MV on IAP in a group of critically ill patients with no other risk factors for intra-abdominal hypertension (IAH).MethodsAn observational multicenter study was conducted on a total of 100 patients divided into two groups: 50 patients without MV and 50 patients with MV. All patients were admitted to the intensive care units of the Medical and Surgical Research Centre, the Carlos J. Finlay Hospital, the Julio Trigo University Hospital, and the Calixto García Hospital, in Havana, Cuba between July 2000 and December 2004. The IAP was measured twice daily on admission using a standard transurethral technique. IAH was considered if IAP was greater than 12 mmHg. Correlations were made between IAP and body mass index (BMI), diagnostic category, gender, age, and ventilatory parameters.ResultsThe mean IAP in patients on MV was 6.7 ± 4.1 mmHg and significantly higher than in patients without MV (3.6 ± 2.4 mmHg, p < 0.0001). This difference was maintained regardless of gender, age, BMI, and diagnosis. The use of MV and BMI were independent predictors for IAH for the whole population, while male gender, assisted ventilation mode, and the use of PEEP were independent factors associated with IAH in patients on MV.ConclusionsIn this study, MV was identified as an independent predisposing factor for the development of IAH. Critically ill patients, which are on MV, present with higher IAP values on admission and should be monitored very closely, especially if PEEP is applied, even when they have no other apparent risk factors for IAH.

Tight control of fluid balance may reduce incidence of intra-abdominal hypertension in patients after major abdominal surgery and trauma: a pilot study

Massive fluid resuscitation followed by hypoperfusion abnormalities in the ICU is a risk factor for development of intra-abdominal hypertension (IAH). The aim of our study was to determine what influence would have the control of daily fluid balance on the incidence of IAH in patients after extensive abdominal surgery or after abdominal trauma.

Intra-abdominal hypertension in patients with sellar region tumors

BackgroundData on intra-abdominal hypertension [IAH] and secondary abdominal compartment syndrome [ACS] due to neurological insults are limited.MethodsThis was a prospective observational study conducted between January 2010 and January 2011 in the neurological ICU [NICU]. Forty-one consecutive patients with sellar region tumors [SRT] were enrolled into the study. If conservative therapy was ineffective in patients with ACS, thoracic epidural anesthesia [EA] was performed. Primary endpoint was defined as the efficacy of conservative treatment and EA in patients with IAH and ACS; secondary endpoint, the influence of IAH and ACS on outcomes.ResultsOf the 41 patients, 13 (31.7%) had normal intra-abdominal pressure and 28 (68.3%) developed IAH, of whom 9 (22%) had ACS (group II). On average, IAH developed on the second postoperative day, while ACS, between the third and the fifth day. Multiple organ dysfunction developed in 3 (23.1%) patients of group I and in 23 (82%) patients of group II (p = 0.0003). Ileus due to gastrointestinal dysmotility was present in 6 (46.2%) patients of group I and in all patients of group II (p = 0.0001). Significant risk factors for ileus were diencephalon dysfunction (whole group - in 33 patients (80.5%); group I - in 6 patients (46.2%); group II - in 27 patients (96.4%), p = 0.0002) and sepsis (whole group - in 8 patients (19.5%); group I - no cases; group II - in 8 patients (28.6%), p = 0.03). Conservative treatment was effective in the majority of patients (78.9%) with IAH and only in 3 (33%) patients with ACS. Thoracic EA was performed in four patients with ACS with success. Length of stay in the NICU was 6.5 ± 4.6 days in group I and 24.1 ± 25.7 (p = 0.02) days in group II. Five out of nine (55.6%) patients with ACS died. None of these patients received EA. All patients with EA had favorable outcomes.ConclusionThe development of IAH is common after SRT surgery. If conservative treatment is ineffective, EA can be considered in patients with secondary ACS. Further studies are warranted.

Early continuous veno-venous haemofiltration in the management of severe acute pancreatitis complicated with intra-abdominal hypertension: retrospective review of 10 years' experience

BackgroundConservative treatment of patients with severe acute pancreatitis (SAP) may be associated with development of intra-abdominal hypertension (IAH), deterioration of visceral perfusion and increased risk of multiple organ dysfunction. Fluid balance is essential for maintenance of adequate organ perfusion and control of the third space. Timely application of continuous veno-venous haemofiltration (CVVH) may help in balancing fluid replacement and removal of cytokines from the blood and tissue compartments. The aim of the present study was to determine whether CVVH can be recommended as a constituent of conservative treatment in patients with SAP who suffer IAH.MethodsA retrospective analysis of 10 years' experience with low-flow CVVH application in patients with SAP who develop IAH was. In all patients, measurement of the intra-abdominal pressure (IAP) was done indirectly through the urinary bladder. Sequential organ failure assessment (SOFA) score was calculated for severity assessment, and necrotizing forms were verified by contrast-enhanced computed tomography. Dynamics of IAP were analysed in parallel with signs of systemic inflammation, dynamics of C-reactive protein and cumulative fluid balance. All variables, complication rate and outcomes were analysed in the whole group and in patients with IAH (CVVH and no-CVVH groups).ResultsFrom the total of 130 patients, 75 were treated with application of CVVH and 55 without CVVH. Late hospitalization was associated with application of CVVH. Infection was observed in 28.5% of cases regardless of the type of treatment received, with a similar necessity for surgical intervention. IAH was observed in 68.5% of patients, and they had significantly higher SOFA scores compared to patients with normal IAP. CVVH treatment resulted in negative cumulative fluid balance starting from day 5 in patients with IAH, whereas without this treatment, fluid balance remained increasingly positive after a week. Finally, application of CVVH resulted in a lower infection rate and shorter hospital stay, 26.7% vs. 37.9%, and a median of 32 (interquartile range (IQR) = 60 to 12) days vs. 24 (IQR = 34 to 4) days, p = 0.05, comparing CVVH vs. no-CVVH group. Mortality rate reached 11.7% in the CVVH group and 13.8% in the no-CVVH group.ConclusionsEarly application of CVVH facilitates negative fluid balance and reduction of IAH in patients with SAP; it is not associated with increased infection or mortality rate and may reduce hospital stay.

Risk Factors and Outcome of Intra‐abdominal Hypertension in Patients with Severe Acute Pancreatitis

Intra-abdominal hypertension (IAH) is common in patients with severe acute pancreatitis (SAP). The aim of the present study was to investigate the risk factors of IAH in SAP patients and assess the prognosis of SAP combined with IAH. To analyze the data from patients with SAP, both univariate and multivariate logistic regression analyses were applied, using 16 indices, including age, gender, Acute Physiology and Chronic Health Evaluation II scores (APACHE II), 24 h fluid balance, hematocrit, serum calcium level, and so on. Clinical prognosis such as mortality, hospital duration, of SAP patients with or without IAH was also compared. First 24 h fluid balance (Odds Ratio [OR], 1.003; 95% Confidence Interval [CI], 1.001-1.006), number of fluid collections (OR, 1.652; 95% CI, 1.023-2.956), and serum calcium level (OR, 0.132; 95% CI, 0.012-0.775) were found to be independent risk factors for IAH in patients with SAP. Moreover, patients with SAP and IAH had significantly longer average length of stay, both in the hospital and in the intensive care unit, higher rates of systemic and local complications, and more invasive treatments. The significant risk factors for IAH in patients with SAP include 24 h fluid balance (first day), number of fluid collections, and serum calcium level. Additionally, IAH is associated with extremely poor prognosis, evidenced by high rates of mortality, morbidity, and the need for invasive interventions.

Open abdomen in the treatment of intra-abdominal hypertension in patients with severe acute pancreatitis

Severe acute pancreatitis (SAP) can induce intra-abdominal hypertension, which has an adverse effect on the function of urinary, circulatory, digestive and neurological system, and finally leads to abdominal compartment syndrome (ACS) if patients were not timely treated. This article focuses on the close relationship between SAP and ACS, which included the definition, classification, pathogenesis of ACS and its pathophysiologic effects on other important organs. The different types and indications of surgical interventions of ACS were discussed in detail. For SAP patients complicated with ACS, urgent open abdomen is important to decrease the abdominal pressure and to prevent the incidence of multi-organ dysfunction syndrome. Complications after open abdomen, such as intestine fistula,abdominal sepsis, intestinal dysfunction and abdominal deficit,should be managed prudently. Key words: Severe acute pancreatitis; Intra-abdominal hypertension; Open abdomen

Hipertensión intraabdominal y síndrome compartimental abdominal

Although intraabdominal pressure (IAP) has been studied for more than 100 years, the concepts of intraabdominal hypertension (IAH) and abdominal compartmental syndrome (ACS) have only been developed as clinical entities of interest in intensive care in the last 5 years. At the first Congress on Abdominal Compartment Syndrome in December 2004, a series of definitions were established, which were published in 2006. IAH is defined as IAP ≥ 12 mmHg and is classified in four severity grades, the maximum grade being ACS, with the development of multiorgan failure. The incidence of IAH in patients in intensive care units is high, around 30% at admission and 64% in those with a length of stay of 7 days. The increase in IAP leads to reduced vascular flow to the splenic organs, increased intrathoracic pressure and decreased venous return, with a substantial reduction in cardiac output. If IAH persists, these physiopathologic episodes are followed by the development of multiorgan failure with renal, cardiocirculatory and respiratory failure and intestinal ischemia. Mortality from untreated ACS is higher than 60%. The only treatment for ACS is surgical decompression. In patients with moderate IAH, medical treatment should be optimized, based on the following measures: a) serial IAP monitoring; b) optimization of systemic perfusion and the function of the distinct systems in patients with high IAP; c) instauration of specific measures to decrease IAP; and d) early surgical decompression for refractory IAH. The application of the medical measures that can reduce IAP and early abdominal decompression in ACS improve survival in critically ill patients with IAH.

The influence of fluid balance on intra-abdominal pressure after major abdominal surgery

Objective. The objectives of this study were to determine the incidence of intraabdominal hypertension in patients after major abdominal surgery and to evaluate the correlation of intra-abdominal pressure with fluid balance and systemic inflammatory response syndrome. Material and methods. This is a prospective observational study. Patients, admitted to intensive care unit after major abdominal surgery, were included into the study. Intra-abdominal pressure was measured via a urinary bladder catheter twice daily. Twenty-four-hour fluid balance and systemic inflammatory response syndrome criteria met by the patients were collected daily. Results. Seventy-seven patients were included into the study. Intra-abdominal hypertension was diagnosed in about 40% of the patients in the early postoperative period. The study showed a significant positive correlation between 24-hour fluid balance and daily changes in intraabdominal pressure. A significant association was also seen between the number of positive systemic inflammatory response syndrome criteria and intra-abdominal pressure, and intraabdominal pressure was significantly higher in patients with systemic inflammatory response syndrome. Besides, patients with intra-abdominal hypertension on the first postoperative day had longer length of stay in the intensive care unit. Conclusions. Intra-abdominal hypertension occurs commonly in patients after major abdominal surgery, and patients with positive 24-hour fluid balance and/or systemic inflammatory response syndrome are at risk of having higher intra-abdominal hypertensio

Clinical Relevance of Intra-Abdominal Hypertension in Patients With Severe Acute Pancreatitis

Intra-abdominal hypertension (IAH) contributes to organ failure in patients with abdominal trauma and sepsis and leads to the development of abdominal compartment syndrome (ACS). This study aims to investigate the clinical significance of IAH in patients with severe acute pancreatitis (SAP). Patients admitted to intensive care with SAP underwent daily measurement of intra-abdominal pressure (IAP), recording of the clinical data, and calculation of 4 organ dysfunction scores. Among 18 patients with SAP, 11 (61%) developed IAH (median, 20 mm Hg), whereas 10 (56%) developed ACS. The IAP correlated significantly with the 4 organ dysfunction scores; the scores were significantly higher when IAH existed than when it did not. The admission IAP correlated significantly with the duration of intensive care stay. Patients who developed IAH/ACS had significantly higher organ failure score and greater mortality compared with those who did not. Laparotomy and drainage reduced the IAP by a median of -11 mm Hg and relieved the IAH/ACS in all patients. Intra-abdominal hypertension and ACS are frequent findings in patients with SAP and are associated with deterioration in organ function. Intra-abdominal pressure correlates with the severity of organ failure, and a high admission IAP is associated with prolonged intensive care stay.

Major Blunt Liver Injury with Contrast Pooling and Abdominal Compartment Syndrome: Report of a Case

The abdominal compartment syndrome (ACS), broadly defined as organ dysfunction due to intra-abdominal pressure beyond some cut-off point, can occur in patients with severe blunt abdominal solid organ injury with massive hemoperitoneum. Here, we report a 20-year-old man sustaining major liver laceration with contrast extravasation and massive hemoperitoneum. He subsequently developed ACS and was successfully treated with angioembolization and needle paracentesis. We suggest that bed-side ultrasonography and needle paracentesis be considered as an expedient alternative for decompression of intra-abdominal hypertension in patients with blunt solid visceral organ injury with massive hemoperitoneum and ACS.

Management of Intra‐abdominal Hypertension in Patients With Severe Acute Pancreatitis With Continuous Hemodiafiltration Using a Polymethyl Methacrylate Membrane Hemofilter

To evaluate, with a prospective observational study, whether continuous hemodiafiltration using a polymethyl methacrylate membrane hemofilter (PMMA-CHDF) is effective for prevention and treatment of intra-abdominal hypertension (IAH) and abdominal compartment syndrome (ACS) on patients with severe acute pancreatitis (SAP). The study was carried out in the general intensive care unit (ICU) of a university hospital. Seventeen consecutive patients with SAP were treated in the intensive care unit and underwent PMMA-CHDF whether or not they had renal failure. Blood level of interleukin (IL)-6, as an indicator of cytokine network activation, and intra-abdominal pressure (IAP) were measured daily to investigate their time-course of changes and the correlation between the two. The blood level of IL-6 was high at 1350+/-1540 pg/mL on admission to the ICU. However, it significantly decreased to 679+/-594 pg/mL 24 h after initiation of PMMA-CHDF (P<0.05), and thereafter decreased rapidly. Mean intra-abdominal pressure (IAP) on admission was high, at 14.6+/-5.3 mm Hg, with an IAP of 20 mm Hg or over in 2 of 17 patients, showing that they had already developed IAH. The IAP was significantly lower (P<0.05) 24 h after initiation of PMMA-CHDF, and subsequently decreased. There was a significant positive correlation between blood level of IL-6 and IAP, suggesting that PMMA-CHDF improved vascular permeability through elimination of cytokines, and that it thereby decreased interstitial edema to lower IAP. Sixteen of the 17 patients were discharged from the hospital in remission from SAP without development of complications. Continuous hemodiafiltration using a polymethyl methacrylate membrane hemofilter appears to be effective for prevention and treatment of IAH in patients with SAP through the removal of causative cytokines of hyperpermeability.

Intra-abdominal hypertension in patients with severe acute pancreatitis

IntroductionAbdominal compartment syndrome has been described in patients with severe acute pancreatitis, but its clinical impact remains unclear. We therefore studied patient factors associated with the development of intra-abdominal hypertension (IAH), the incidence of organ failure associated with IAH, and the effect on outcome in patients with severe acute pancreatitis (SAP).MethodsWe studied all patients admitted to the intensive care unit (ICU) because of SAP in a 4 year period. The incidence of IAH (defined as intra-abdominal pressure ≥ 15 mmHg) was recorded. The occurrence of organ dysfunction during ICU stay was recorded, as was the length of stay in the ICU and outcome.ResultsThe analysis included 44 patients, and IAP measurements were obtained from 27 patients. IAH was found in 21 patients (78%). The maximum IAP in these patients averaged 27 mmHg. APACHE II and Ranson scores on admission were higher in patients who developed IAH. The incidence of organ dysfunction was high in patients with IAH: respiratory failure 95%, cardiovascular failure 91%, and renal failure 86%. Mortality in the patients with IAH was not significantly higher compared to patients without IAH (38% versus 16%, p = 0.63), but patients with IAH stayed significantly longer in the ICU and in the hospital. Four patients underwent abdominal decompression because of abdominal compartment syndrome, three of whom died in the early postoperative course.ConclusionIAH is a frequent finding in patients admitted to the ICU because of SAP, and is associated with a high occurrence rate of organ dysfunction. Mortality is high in patients with IAH, and because the direct causal relationship between IAH and organ dysfunction is not proven in patients with SAP, surgical decompression should not routinely be performed.

Intra-abdominal hypertension is an independent cause of postoperative renal impairment.

Intra-abdominal hypertension exerts an effect on renal function independent of other confounding variables. A prospective study of all patients admitted to an intensive care unit following abdominal surgery was undertaken between September 1, 1994, and July 31, 1997, in a single university hospital. Intra-abdominal pressure (IAP) was measured every 8 hours (normal IAP, 0-17 mm Hg); 18 mm Hg or higher was considered increased. Forward stepwise logistic regression determined whether intra-abdominal hypertension is an independent cause of renal impairment. A total of 263 patients (174 after emergency surgery), whose mean +/- SD age was 61.0 +/- 18.7 years and Acute Physiology and Chronic Health Evaluation II score was 14.6 +/- 7.7, were studied. Intra-abdominal pressure was increased in 107 (40.7%) of the 263 patients. Renal impairment occurred in 35 (32.7%) of the 107 patients with intra-abdominal hypertension and in 22 (14.1%) of the 156 with a normal IAP (odds ratio, 1.62-5.42). Using the Wald maximizing model, renal impairment was independently associated with 4 antecedent factors: hypotension (P= .09), sepsis (P = .006), age older than 60 years (P = .03), and increased IAP (P = .004). To our knowledge, for the first time in a large clinical study, IAP has been shown to be an independent cause of renal impairment, and it ranks in importance after hypotension, sepsis, and age older than 60 years. Surgeons need to be aware of the importance of intra-abdominal hypertension in patients postoperatively.