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ORIGINAL RESEARCH article

Front. Pediatr., 07 May 2024
Sec. Pediatric Surgery

Developing and validating a nomogram for early predicting the need for intestinal resection in pediatric intussusception

\r\nYuan-Yang Yu,&#x;Yuan-Yang Yu1,†Jia-Jie Zhang,&#x;Jia-Jie Zhang1,†Ya-Ting XuYa-Ting Xu1Zheng-Xiu LinZheng-Xiu Lin1Shi-Kun GuoShi-Kun Guo1Zhong-Rong LiZhong-Rong Li1Hui-Ya Huang
Hui-Ya Huang2*Xiao-Zhong Huang
\r\nXiao-Zhong Huang1*
  • 1Department of Pediatric Surgery, The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University, Wenzhou, China
  • 2Department of Intensive Care Unit, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China

Purpose: Develop and validate a nomogram for predicting intestinal resection in pediatric intussusception suspecting intestinal necrosis.

Patients & methods: Children with intussusception were retrospectively enrolled after a failed air-enema reduction in the outpatient setting and divided into two groups: the intestinal resection group and the non-intestinal resection group. The enrolled cases were randomly selected for training and validation sets with a split ratio of 3:1. A nomogram for predicting the risk of intestinal resection was visualized using logistic regression analysis with calibration curve, C-index, and decision curve analysis to evaluate the model.

Results: A total of 547 cases were included in the final analysis, of which 414 had non-intestinal necrosis and 133 had intestinal necrosis and underwent intestinal resection. The training set consisted of 411 patients and the validation cohort included 136 patients. Through forward stepwise regression, four variables (duration of symptoms, C-reaction protein, white blood cells, ascites) were selected for inclusion in the nomogram with a concordance index 0.871 (95% confidence interval: 0.834–0.908).

Conclusion: We developed a nomogram for predicting intestinal resection in children with intussusception suspecting intestinal necrosis after a failed air-enema based on multivariate regression. This nomogram could be directly applied to facilitate predicting intestinal resection in pediatric intussusception suspecting necrosis.

1 Introduction

Intussusception, defined as intestinal obstruction caused by the telescoping of a portion of the gut and its mesentery into the adjacent intestinal cavity leading to bowel inflammation and edema (1), is one of the most prevalent causes of acute abdominal diseases in infants and children with peak incidence between 3 and 12 months of age (2). Diagnosing intussusception is challenging depending on the clinical symptoms and signs, which often overlap with multiple other diseases. Furthermore, prompt diagnosis and prediction of intestinal ischemia poses a clinical conundrum for pediatricians and pediatric surgeons due to nonspecific early clinical signs, such as lethargy, diarrhea, or irritability.

Once diagnosis and treatment are delayed, there is a great risk of intestinal ischemia, necrosis, perforation, and peritonitis, even severe dehydration and shock leading to death (3) as the venous congestion and bowel wall edema continue to advance (4, 5). If intestinal necrosis can be predicted and treated earlier with better diagnostic methods, the adverse effects of intussusception can be mitigated, even predicted before complete intestinal necrosis and corresponding treatment can be performed to reduce the incidence of intestinal resection and poor prognosis. Previous studies have focused on the risk factors for intestinal necrosis in intussusception (6, 7), while the complex statistical models limit their utility in clinical decision-making. Therefore, a more accurate and reusable model is urgently needed to predict intestinal resection in intussusception suspecting intestinal necrosis.

Based on multivariate regression analysis, a nomogram integrates multiple predictors and draws them on the same plane according to a certain proportion with calibrated line segments to illustrate the relationship between variables in the prediction model which means more readable and convenient for patients to evaluate (8). Hence, our goal was to develop and validate a nomogram for predicting intestinal resection in pediatric intussusception suspecting intestinal necrosis based on individual preoperative clinical data.

2 Methods

2.1 Patients

If pediatric patients were highly suspected of having intussusception in outpatient clinic based on ultrasonography and clinical manifestations, a follow-up air enema was performed under fluoroscopy to verify it. Air enema reduction was performed by pediatric surgeons and radiologists up to 3 min with pressure enema from 80 mmHg to 120 mmHg. If first air enema failed, at least two specialized pediatric surgeons would evaluate whether the child was stable, lack of peritonitis, and loosening of the intussusceptum on previous air enema attempt to determine whether to perform air enema again after conservative treatment such as rehydration, anti-inflammatory. If so, after fully informing the family of the risks of re-reduction such as intestinal perforation and obtaining consent, air enema reduction attempt was carried out again. Patients were hospitalized if three air-enema reduction attempts failed or if there was suspicion of intestinal necrosis or perforation. Hospitalized children diagnosed with intestinal intussusception due to unsuccessful air-enema reduction between 1 January 2010 and 31 December 2023 were retrospectively examined. Exclusion criteria were as follows: (1) cases with incomplete medical records; (2) warfarin or heparin use, liver disease, nephrotic syndrome, and/or other diseases potentially affecting blood clotting function.

Emergency surgical reduction was performed after obtaining informed consent in children with failed air-enema reduction. The judgement of intestinal necrosis and the decision to perform intestinal resection were made intraoperatively based on the loss of bowel viability due to non-responsiveness to stimulation, loss of tension and peristalsis, hypoxic discoloration, and the absence of pulsation in the corresponding terminal artery. The final diagnosis of intestinal necrosis depended on the intraoperative findings by surgeons and the postoperative pathological examinations. According to the results of intraoperative and pathology assessments, the enrolled patients were categorized into two groups: the intestinal resection group and the non-intestinal resection group. The patients were randomly selected for training and validation sets in a 3:1 ratio.

The study was approved by the Ethics Committees of The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University. Because of the nature of retrospective study, the informed consent was waived.

2.2 Variables

The medical records of enrolled patients were collected, including demographic distribution [age, gender, duration of symptoms (hours)], clinical characteristics [red currant jelly stool, fever, abdominal pain, diarrhea, vomitus, intermittent crying, pathological lead points (PLPs), classification of intussusception based on localization (ileo-colic, ileo-cecal, compound/complex, multiple, and small intestinal)], laboratory parameters [C-reaction protein (CRP), white blood cells (WBCs), red blood cells (RBCs), hemoglobin (HB), hematocrit (HCT), mean corpuscular volume (MCV), red cell distribution width-CV (RDW-CV), platelets (PLTs), mean platelet volume (MPV), platelet distribution width (PDW), thrombocytocrit (PCT), neutrophil counts, lymphocyte counts, basophil counts, monocyte counts, eosinophil counts, D-dimer, prothrombin time (PT), prothrombin time-INR (PT-INR), activated partial thromboplastin time (APTT), thrombin time (TT), plasma fibrinogen], ultrasonographic features (ascites, intestinal dilation, enlarged lymph nodes), pneumatic reduction records, surgical findings, and pathology reports. The duration of symptoms was defined as the time from presence of symptoms to the time of hospitalization. Fever was defined as temperature above 37.5°C, as recorded by ear at presentation. Ileo-colic intussusception referred to distal ileum prolapsed into the adjacent colon. Ileo-cecal intussusception referred to distal ileum prolapsed into the adjacent ileocecal junction. Compound/complex intussusception referred to more than one proximal intestinal segment prolapsed into the adjacent one. Multiple intussusception referred to more than one intussusceptions in different intestinal segments. Small intestinal intussusception referred to small intestinal segment prolapsed into the adjacent distal small intestine.

2.3 Statistical analysis

The data in this study was analyzed by R4.3.1 software and the Statistical Package for Social Science (SPSS) version 22.0 (IBM, Armonk, New York). There was no missing data in the final analysis. Univariate and multivariate analysis were conducted to estimate the correlation between the predictors and the main binary classification results. Discrete variables were expressed as counts (percentage), and continuous variables as means ± standard deviation (SD) or median with interquartile range (IQR) depending on normality. The normally distributed continuous variables were compared by Student's t-test, non-normally distributed variables as Mann–Whitney U-test, and the qualitative data as Pearson's Chi-square or Fisher's exact tests. Then, based on clinic and univariable analysis, the significant variables were selected for inclusion in multivariable logistic regression prediction model. Odds ratios (ORs) and 95% confidence interval (CI) were calculated via forward stepwise regression conducted through the maximum likelihood estimation and the model was visualized using a nomogram with the training set, showcasing its calibration and discrimination. The validation set was used to validate the newly developed nomogram. Receiver operating characteristic (ROC) curve evaluated the prediction ability of the model. Area under curve (AUC) >0.5 indicated well prediction value of the model. The concordance-index (C-index) quantifies the level of concordance between predicted and observed probabilities. The calibration curve demonstrated consistency between the prediction and observation. Decision curve analysis (DCA) assessed the clinical risk and benefit. The Hosmer-Lemeshow test was conducted to determine the goodness of fit of the model. A p-value <0.05 was considered statistically significant.

3 Results

3.1 Clinical characteristics

From 1 January 2010 to 31 December 2023, 8,127 pediatric patients were performed air-enema reduction due to intussusception in outpatient clinic, 7,374 cases underwent successful air enema reduction left hospital after a certain period of observation in outpatient clinic if no discomfort occurred during this period, only 753 cases were admitted into the Department of Pediatric Surgery due to air-enema reduction fails or suspicion of intestinal necrosis or perforation. Based on consistent inclusion and exclusion criteria, out of the 753 hospitalized pediatric patients, we excluded 69 cases with incomplete medical records and 137 hospitalized observation cases, who were successfully treated with outpatient air enema. Therefore, the successful rate of air-enema reduction was 92.4% in our hospital. Ultimately, 547 pediatric patients were enrolled in the retrospective analysis, and 133 cases were intestinal necrosis confirmed by pathology. The cases were randomly selected for training and validation sets with a split ratio of 3:1. 411 cases were assigned to the training set, while 136 cases were assigned to the validation set. The training set was used to develop a nomogram model, and the validation set was used to validate the model.

There were no statistical differences between the training set and validation set (p > 0.05) in intestinal resection, demographic distribution, and clinical characteristics, as shown in Table 1. Vomitus was the most prevalent presenting symptom (n = 488, 89.2%), followed by red currant jelly stool (n = 407, 74.4%), intermittent crying (n = 400, 73.1%), fever (n = 238, 43.5%), abdominal pain (n = 106, 19.4%), diarrhea (n = 81, 14.8%), and PLPs (n = 84, 15.4%) in all 547 enrolled cases. Five types of intussusception based on anatomic localization were observed during surgery: ileo-colic (n = 263, 48.1%), ileo-cecal (n = 117, 21.4%), compound/complex (n = 95, 17.4%), multiple (n = 2, 0.4%), small intestinal (n = 70, 12.8%). Table 2 summarized the laboratory investigation of the two sets and Table 3 exhibited the sonographic investigation in pediatric intussusception patients of the two sets. 44.4% (243/547) of patients were found ascites free in abdominal cavity or trapped between intestinal loops under ultrasound. 20.8% of (114/547) patients had bowel dilation and enlarged lymph nodes were found in only 7.7% (42/547) of cases. Comparison results between intestinal resection and non-intestinal resection were shown in Tables 4, 5. The duration of symptoms before presentation was significantly longer in children with enterectomy (49.17 ± 29.65 vs. 20.77 ± 14.87, p < 0.001). There was no significant difference in abdominal pain, intermittent crying, PLPs, and classifications of intussusception between intestinal resection and non-intestinal resection. Compared with children in non-intestinal resection group, the incidences of fever, bloody stool, diarrhea, and vomitus were higher in children who underwent enterectomy due to suspected intestinal necrosis.

Table 1
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Table 1. Demographic and clinical features of the pediatric patients with intussusception with air-enema failure in the training set and validation set.

Table 2
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Table 2. Hematological investigation of the pediatric patients with intussusception with failed air-enema in the training set and validation set.

Table 3
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Table 3. Sonographic investigation of the pediatric patients with intussusception with air-enema failure in the training set and validation set.

Table 4
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Table 4. Demographic and clinical features of intestinal resection group and non-intestinal resection group in the training set.

Table 5
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Table 5. Hematological and sonographic investigation of intestinal resection group and non-intestinal resection group in the training set.

3.2 Development of the nomogram

Univariate analysis was conducted on the training set and 17 variables were the significant factors (p < 0.05), as shown in Tables 6, 7. Based on clinical and statistical evaluation, we included the 17 variables into multivariable analysis and four variables including duration of symptoms (OR = 1.050; 95% CI, 1.035–1.066; p < 0.001), CRP (OR = 1.021; 95% CI, 1.007–1.035; p = 0.004), WBCs (OR = 1.110; 95% CI, 1.048–1.176; p < 0.001), and ascites (OR = 3.781; 95% CI, 2.079–6.874; p < 0.001) were screened to develop the nomogram, as illustrated in Figure 1.

Table 6
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Table 6. Univariate and multivariate analysis on the demographics and clinical characteristics of the predictors of intestinal resection in pediatric intussusception in the training set.

Table 7
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Table 7. Univariate and multivariate analysis on the hematological and sonographic investigation of the predictors of intestinal resection in pediatric intussusception in the training set.

Figure 1
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Figure 1. The nomogram for predictors of intestinal resection in children with intussusception after failed air-enema reduction.

3.3 Validation of the nomogram

The ROC curves were plotted, and the AUC of 0.871 (95% CI, 0.834–0.908) in the training set and 0.838 (95% CI, 0.754–0.921) in the validation set were obtained, indicating that the model possessed high predictive value (Figure 2). The C-index of the prediction nomogram in the training set was 0.871 (95% CI, 0.834–0.908), and the Hosmer-Lemeshow test resulted in p = 0.716, indicating the good reliability of the forecast and goodness of fit. The calibration curve demonstrated the forecast was in good agreement with the actual situation (Figure 3). In order to assess the model's clinical applicability, we performed decision curve analysis on the nomogram. The DCA showed that the model yielded a net benefit over the majority of threshold probabilities (Figure 4).

Figure 2
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Figure 2. ROC of the established model in the training set (A) and validation set (B) ROC, receiver operation characteristic; AUC, area under the curve.

Figure 3
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Figure 3. Calibration curve of the model in the training set (A) and validation set (B) the Y-axis represents the actual intestinal resection rate and the X-axis represents the predicted risk of intestinal resection in pediatric intussusception. The dashed line represents a perfect prediction by an ideal model. The solid line (bias-corrected) represents the bootstrap-corrected performance of our nomogram, and the dotted line (apparent) represents the apparent accuracy of the nomogram.

Figure 4
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Figure 4. Decision curve analysis (DCA) for the predictive model in the training set (A) and validation set (B) the Y-axis is the standardized net benefit and the X-axis denotes the threshold of intestinal resection in pediatric intussusception. The red line represents the predictive model. The application of this predictive model would add net benefit compared with either the treat-all or the treat-none strategies.

4 Discussion

Intussusception is one of the most common abdominal emergency in children and due to its anatomical state, occlusion advances through the mechanisms of obstruction and strangulation (9). As the occlusion level increases, intestinal circulation is impaired, leading to ischemia and necrosis (10). Predicting and diagnosing intestinal necrosis in intussusception can be laborious. Scholars are devoting more attention to building a model for facilitating prediction. Compared with screening for predicting risk factors for intestinal necrosis in pediatric intussusception as shown in previous studies (5, 6, 11, 12), a nomogram integrates more variables and replaces complex statistical models with a simple and straightforward graph (13). Furthermore, in recent years, some researchers have expressed grave concern about the predictive ability of nomograms for intussusception and have stated their potential predictive utility (14, 15). To our knowledge, there are few studies focusing on developing nomograms for intestinal resection due to suspected intestinal necrosis in intussusception. Hence, an effective nomogram based on preoperative clinical risk factors to predict intestinal resection in pediatric intussusception suspecting intestinal necrosis was developed and validated. Risk factors such as the duration of symptoms, CRP, WBCs, ascites detected under ultrasound were incorporated into the nomogram based on the training set, which was identified as highly predictive tool that could be applied directly by validation set.

Abdominal pain, vomiting, and bloody stool constitute the classic triad of intussusception, but are presented in less than 33% of children upon admission (16). In all the enrolled cases, only 34 (6.216%) cases manifested the typical triad, 106 (19.378%) patients had intermittent abdominal pain, 488 (89.214%) patients experienced vomiting, and 407 (74.406%) patients had bloody stools. However, out of 400 cases showing intermittent crying, 326 cases were younger than 12 months and unable to verbally complain about their pain, which may explain the low incidence of the typical triad. A study had shown that vomiting and fever lasting more than two days were important predictors of enterectomy (5). Vomiting before hospitalization was statistically associated with intestinal resection in our univariate analysis (OR = 2.966; 95% CI, 1.138–7.731; p = 0.026). Apart from the above typical symptoms, fever is also common in intussusception. In our cohort, 238 cases (43.51%) presented with fever, with a higher incidence in the intestinal resection group (74 out of 133 cases). Fever reflects a systemic response to intraperitoneal infection and inflammation. Furthermore, hyperpyrexia indicates a poor prognosis (17). Khorana et al. (18) drew a conclusion that a temperature above 37.8°C was one of the predictors of failed manual reduction. And a study on the retrospective analysis of 376 infants aged between 1 and 12 months from 19 states who suffered from intussusception showed that documented fever (temperature >38°C) on admission significantly increased the risk of bowel resection with the OR = 2.7 (adjusted for race and sex), 95% CI 1.2–6.0 (5). Another study conducted previously also identified fever (temperature >37.5°C) into risk factor for predicting intestinal necrosis (7). However, since the p-values in the multivariable analysis were higher than 0.05 and compromised the model's calibration, vomiting and fever were excluded from our model.

The study results were consistent with the findings of previous studies, indicating that a longer duration of illness was more common in patients with intestinal necrosis (7, 11, 12, 14, 1921). Longer duration of symptoms before presentation is related to an increase in the loss of intestinal viability (18). However, differences were observed in the threshold values among various studies, ranging from 24 h to 75 h which may be attributed to recall bias. In our study, the mean duration of symptoms in non-intestinal resection group and intestinal resection group were found to be significantly different and intestinal resection was observed in most of cases with symptoms lasting more than 24 h. Therefore, further research is urgently needed to obtain a more accurate value.

As time prolongs, intestinal tract loses viability, evolving into ischemia and necrosis with massive amounts of toxins likely reaching the bloodstream and becoming measurable which attract attention for potential use in diagnosing intestinal necrosis at an early stage (22). Elevated CRP, WBCs, and other inflammatory factors are common. CRP level is a dynamic inflammation indicator well reflecting systemic inflammation elevating in response to inflammatory reactions, resistance to bacterial infections and tissue damage such as acute appendicitis (23), incarcerated groin hernia (10), intestinal obstruction (24), etc. As shown in our nomogram, CRP significantly contributed to intestinal necrosis, with higher CRP level greatly increasing the risk of intestinal necrosis and indicating the severity of the illness. Some predictive models also took CRP into consideration (25, 26) consistent with the current study. Total leukocyte count has traditionally been considered a hallmark of infection and inflammation (27). Our laboratory study suggested WBCs was an independent early predictor in diagnosing intestinal resection in pediatric intussusception suspecting intestinal necrosis (OR = 1.110; 95% CI, 1.048–1.176; p = 0.002) and significantly higher in intestinal resection than non-intestinal resection, which was probably related to the prolongation of intestinal damage with massive leukocyte releasing into the bloodstream. Coherent with the observations we made, Chen et al. (24) concluded WBCs increased more in severe intestinal obstruction than less severe cases. A study conducted on childhood intussusception after surgery also came to the same conclusion that CRP and WBCs levels were higher in patients who underwent bowel resection than those who underwent manual surgical reduction merely (25). Wu et al. (11) study showed that WBCs level was higher in bowel resection than non-bowel resection, although the difference was not statistically significant due to small sample size. Delgado-Miguel et al. (28) found neutrophils-to-lymphocytes (NLR) a useful indicator of surgery intervention (AUC = 0.925, sensibility: 73.2%, specificity: 94.5%) and was higher in surgery group than non-surgery group, while no significantly differences were found about neutrophils and lymphocytes in our study which may related with different inclusion criteria and basis for grouping. However, they came to similar conclusions about CRP as we did which indicating CRP may be a sensitive indictor.

Inflammation is widely regarded as a regulator of coagulation and fibrinolytic activity. As the terminal products of fibrin degradation, D-dimer increases in vivo during a hypercoagulable state and secondary hyperfibrinolysis, including disseminated intravascular coagulation (DIC), acute ischemic stroke, or acute venous thromboembolism, etc. (29, 30). The association between higher D-dimer level and intestinal ischemia has been reported previously (26, 29, 31). Our study likewise demonstrated that D-dimer had a significant positive correlation with intestinal resection (OR = 1.128; 95% CI, 1.005–1.267; p = 0.040) in univariable analysis, whereas no significant difference was observed in the multivariate analysis. Thus, we got it rid of our model.

Ultrasound is the primary imaging modality used to diagnose intussusception, with a sensitivity of 98%–100%, a specificity of 88%–100%, and a negative predictive value of 100% (2, 32, 33). Besides the essentiality of diagnosis, ultrasonography also provides important elements in the therapeutic choice of non-surgical or surgical reduction. Absence of vascular signs on color-Doppler and trapped fluid between involved bowels highlight the necessity of surgery (2). It was reported that the occurrence of fluid retention between the intussuscepted bowel segments strongly correlated with bowel ischemia, with a sensitivity 80%–100%, a specificity of 75%–92% (34, 35), while the presence of free intraperitoneal fluid did not essentially indicate the existence of complications such as peritonitis, and intestinal necrosis or perforation (2). Hosokawa et al. (36) also showed echogenic ascites was associated with surgical interventions in intestinal twist. And in our study, ascites detected by abdominal ultrasound is one of the independent predictors of intestinal necrosis in intussusception which may attribute to intestinal wall venous and lymphatic congestion resulting from intestinal wall compression after prolonged intussusception (3, 34).

However, our study had some limitations. First, it was a retrospective, observational study, so the accuracy of medical records could not be assessed. Second, the sample size was relatively small, and exclusively patients with air-enema failure were screened, which limited the generalizability and representativeness of the conclusions to some extent. Further long-term, prospective studies with large samples are urgently needed.

5 Conclusion

In conclusion, we developed a nomogram on the basis of clinical risk factors for intestinal resection in pediatric intussusception suspecting intestinal necrosis. This nomogram can be conveniently employed to facilitate preoperative decision-making for pediatric intussusception.

Data availability statement

The raw data supporting the conclusions of this article will be made available by the authors, without undue reservation.

Ethics statement

The studies involving humans were approved by the Ethics Committees of The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical. The studies were conducted in accordance with the local legislation and institutional requirements. Written informed consent for participation was not required from the participants or the participants’ legal guardians/next of kin in accordance with the national legislation and institutional requirements.

Author contributions

Y-YY: Supervision, Writing – original draft, Writing – review & editing. J-JZ: Data curation, Investigation, Methodology, Resources, Writing – review & editing. Y-TX: Formal Analysis, Project administration, Writing – original draft, Writing – review & editing. Z-XL: Investigation, Methodology, Writing – review & editing. S-KG: Writing – original draft, Writing – review & editing. Z-RL: Investigation, Methodology, Writing – review & editing. H-YH: Visualization, Writing – original draft, Writing – review & editing. X-ZH: Conceptualization, Methodology, Project administration, Resources, Supervision, Writing – original draft, Writing – review & editing.

Funding

The author(s) declare financial support was received for the research, authorship, and/or publication of this article.

National Natural Science Foundation of China, Grant/Award Numbers: 81903235; Natural Science Foundation of Zhejiang Province, Grant/Award Numbers: LQ21H110001.

Acknowledgments

We would like to thank our Department of Pediatric Surgery colleagues for their help with data collection.

Conflict of interest

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Publisher's note

All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.

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Keywords: intussusception, intestinal necrosis, pediatrics, nomogram, predictor, intestinal resection

Citation: Yu Y-Y, Zhang J-J, Xu Y-T, Lin Z-X, Guo S-K, Li Z-R, Huang H-Y and Huang X-Z (2024) Developing and validating a nomogram for early predicting the need for intestinal resection in pediatric intussusception. Front. Pediatr. 12:1409046. doi: 10.3389/fped.2024.1409046

Received: 29 March 2024; Accepted: 25 April 2024;
Published: 7 May 2024.

Edited by:

Carmelo Romeo, University of Messina, Italy

Reviewed by:

Zlatan Zvizdic, Clinical Center University of Sarajevo, Bosnia and Herzegovina
Carlos Delgado-Miguel, Hospital Infantil La Paz, Spain

© 2024 Yu, Zhang, Xu, Lin, Guo, Li, Huang and Huang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

*Correspondence: Hui-Ya Huang huanghuiya1248@126.com Xiao-Zhong Huang wzmchxz@163.com

These authors have contributed equally to this work

Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.