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        Role of contrast-enhanced serial/spot abdominal X-rays in perioperative follow-up of patients undergoing abdominal surgery:An observational clinical study

        2023-07-26 03:24:48OsmanNuriDilekArifAtayOrgunGunesFurkanKarahanebnemKarasu
        World Journal of Radiology 2023年6期
        關鍵詞:文件名專屬列表

        Osman Nuri Dilek, Arif Atay, Orgun Gunes, Furkan Karahan, ?ebnem Karasu

        Abstract

        BACKGROUND

        Many imaging methods such as ultrasonography, computed tomography (CT), magnetic resonance imaging, and endoscopy are used to identify the problems or complications that occur in the perioperative period and to determine the appropriate therapeutic approach. Specialists at surgical clinics and intensive care units sometimes need diagnostic procedures that can give quick results or reveal unexpected results. In particular, rapid on-site evaluation of patients followed under intensive care conditions has several advantages.

        AIM

        To determine the problems developing in patients in the perioperative period by contrast-enhanced abdominal X-ray (CE-AXR), revealing their current status or defining the effectiveness of CE-AXR.

        METHODS

        The files of the patients who underwent hepatopancreatobiliary or upper gastrointestinal surgery, whose CE-AXR film was taken, were reviewed retrospectively. Abdominal X-ray radiographs taken after ingestion of a watersoluble contrast agent (iohexol, 300 mg, 50 cc vial) and its application in a drain, nasogastric tube, or stent were evaluated. The contribution of the data obtained in patients who underwent CE-AXR to the diagnosis, follow-up, and treatment processes and the effectiveness of the application were investigated.

        RESULTS

        CE-AXR was applied to 131 patients in our clinic, most of whom underwent hepatopancreatobiliary or upper gastrointestinal surgery. It was determined that the data obtained from CE-AXR films taken in 98 (74.8%) of the patients contributed to the diagnosis, treatment, and follow-up expectations and positively affected the clinical processes.

        CONCLUSION

        CE-AXR is a simple procedure that can be applied anywhere, especially in intensive care patients and at bedside, with a portable X-ray device. The simplicity of the procedure, less radiation exposure for the patients, less time wastage, reduction in the CT and endoscopy procedure burden and costs, quick results, rapid assessment of the situation, and enabling the monitoring of processes with repetitive procedures are important advantages. X-rays taken will be useful in terms of being a reference value during the follow-up period of the patient and determining the situation in medicolegal processes.

        Key Words: Abdominal X-rays; Contrast medium; Diagnosis; Complication; Leakage; Radiation exposure

        INTRODUCTION

        A wide variety of imaging methods is used to identify the problems encountered during the follow-up of patients in surgery. Ultrasonography (USG), magnetic resonance imaging (MRI), computed tomography (CT), and endoscopic interventions are the most commonly used methods. It has been reported that interpretations in diagnostic procedures can be very variable and erroneous reporting (diagnosis) is made in 2%-20% of cases in the literature[1]. On the other hand, most diagnostic devices, except USG and mobile X-ray devices, can be used with limitations of place, time, device, and technical staff.

        Direct abdominal X-ray (AXR) radiographs are one of the diagnostic devices that can be used almost everywhere in hospitals with the use of mobile X-ray devices, especially in emergency services[2]. It has also been frequently used to control subclavian, jugular, percutaneous endoscopic gastrostomy, nasogastric tube, or peritoneal dialysis catheter positions. It has been reported that while AXR detects foreign bodies with a sensitivity of 90%, it shows intestinal obstructions with a sensitivity of 49%[3]. It has been reported that the data obtained from approximately half of the patients who underwent AXR in the emergency department have no relation with the definitive diagnosis[4]. The use of mobile X-ray devices can play a vital role in the identification and decision-making of developing pathologies, especially in patients followed in intensive care units.

        There are no enough studies in the literature on the use of direct/spot contrast-enhanced AXR (CEAXR) following contrast agent administration. In this observational clinical study, we aimed to examine our CE-AXR application results in the definition and follow-up of clinical manifestations in patients hospitalized in intensive care units and clinics, mostly with hepatopancreatobiliary and upper abdominal surgery, in the light of the literature.

        MATERIALS AND METHODS

        Study population and data collection

        The data was obtained by retrospectively examining the files of the patients who had CE-AXR films in the surgical clinic (125 beds) of our university hospital (1100 beds) between 2017 and 2021. Since hepatopancreatobiliary (HPB) and upper gastrointestinal surgeries are mainly performed in our clinic, the patients participating in the study manily underwent pancreatic, liver, biliary tract, esophagus, and stomach surgeries. Most of the patients who underwent major surgery were followed in the intensive care unit in the early postoperative period (1-5 d). Those who were followed in the clinic or the outpatient clinic or who applied to the emergency department with serious complications were also followed in the intensive care unit. Along with conventional diagnostic tools in our hospital, mobile ultrasound and mobile X-ray devices are constantly used.

        Study assessment and criteria

        CE-AXR scans were performed on selected patients to control and confirm the efficacy of surgeries or to evaluate unexpected results. Outpatient X-ray devices were used in stable patients and mobile X-ray devices were used in patients hospitalized in the clinic. CE-AXR images were taken with mobile X-ray machines at bedside for patients who were thought to be evaluated in the intensive care unit. More complicated patients were transported to the radiology service with their beds and mobile life support units for conventional CT or MRI examination. In case of insufficient data obtained with CE-AXR or in patients with an unexpected pathological condition (anastomotic leakage, stricture,etc.), it was decided to perform MRI, magnetic resonance cholangiopancreatography (MRCP), or CT first. Data on conventional cholangiography and other conventional contrast-enhanced imaging methods were not included in the study.

        Techniques

        AXR radiographs taken following the ingestion of a water-soluble contrast agent (iohexol, 300 mg, 50 cc vial) in the preoperative or postoperative period and its application in a drain or stent were evaluated. CE-AXRs were taken in the early or late periods following the application according to the characteristics of the case and expectations. In patients with percutaneous transhepatic biliary drainage (PTBD), AXR imaging was performed by administering the contrast material through the catheter on postoperative 5th-10th days. While a single spot AXR radiography may be sufficient in most cases, in some of the cases, 2-3 spot AXRs were taken intermittently to monitor the intestinal passage.

        In the evaluation of the results, statistical analysis methods were not used, except for numerical and proportional data for the evaluation of whether the procedure contributed to the diagnosis and treatment process.

        The study was carried out in accordance with the principles of the Helsinki Declaration. As a routine procedure, written informed consent was obtained from each patient for all procedures and publications. Ethics committee approval was received for this study (2022/GOKAE/0542) from the Clinical Trials Ethics Committee.

        RESULTS

        CE-AXR images of 131 cases included in the study were evaluated retrospectively (Table 1). CE-AXR images taken to evaluate the patency of anastomoses, which were initially performed in our clinic only in selected patients with PTBD and have started to be applied in more patients in the last two years. CEAXR was taken at bedside in 67 patients in the intensive care unit during their follow-up. Patients who could not be evaluated with the obtained CE-AXR images were sent to the relevant units for endoscopy, CT, or other diagnostic examinations.

        Table 1 Characteristics of patients with contrast-enhanced abdominal X-ray (n = 131)

        Anastomosis could be evaluated in 29 (80%) patients in CE-AXR radiographs taken with the contrast medium given through the PTBD catheter among 36 patients who underwent hepaticojejunostomy or portoenterostomy (Figure 1). Anastomotic leakage was detected in two patients, while stricture developed in two patients. It was decided to perform MRCP in seven patients who developed complications and could not be evaluated due to insufficient images.

        Figure 1 Postoperative contrast-enhanced abdominal X-ray images following hepaticojejunostomy for the reconstruction of the biliary tract. A: Postoperative 14th day contrast-enhanced abdominal X-ray in a 42-year-old man with major bile duct trauma (Strasberg Bismuth E1) who underwent T-tube reconstruction; the biliary tract and anastomosis was normal; B: The anastomosis and bile flow patency was normal in a 47-year-old woman who underwent hepaticojejunostomy for major bile duct trauma (Strasberg Bismuth E2); C: The stricture (arrow) in the common hepatic duct was detected in a 38-year-old woman who developed jaundice after biliary tract trauma (Strasberg Bismuth E2) and underwent percutaneous transhepatic biliary drainage.

        Oral fluid-food intake is started after the routine evaluation of CE-AXR radiographs taken on the 3rdor 4thpostoperative days of our patients who underwent esophagectomy (+ gastric pull-up) or total gastrectomy (+ Roux-n-Y reconstruction) (Figure 2). A descriptive image was obtained in 27 of 34 patients (79%) who underwent CE-AXR, and anastomotic leakage was detected in two of the cases (Table 1) (Figure 3). Adequate radiological imaging (Figure 4) was obtained in 15 of 18 patients (78%) with sleeve gastrectomy in our series, no complications were detected in any of them, and the patients were discharged with full recovery.

        Figure 2 Contrast-enhanced abdominal X-ray images following gastrointestinal reconstruction for stomach/esophagus tumors. A: A 67-year-old man and a 78-year-old woman who underwent esophagectomy + gastric pull-up for distal esophageal tumor. The esophagogastric passage was normal without any findings of fistula or leakage at the sites of anastomoses on the postoperative 4th day; C: The position of the jejunal loop/stump and the passage was normal in a 72-year-old woman who underwent total gastrectomy and Roux-n-Y anastomosis for cardia tumor.

        Figure 3 Contrast-enhanced abdominal X-ray images showing anastomotic leakage. A: Anastomotic leakage in a 77-year-old man with total gastric resection and Roux-n-Y anastomosis (arrows) for gastric cancer on the 6th postoperative day; B: Anastomotic leakage detected in a 63-year-old man on the postoperative 4th day who underwent esophagectomy + gastric pull-up for distal esophagus tumor; C: Repeated control contrast-enhanced abdominal X-ray showed healing in the same patient on postoperative 30th day.

        Figure 4 Functionality of the gastrointestinal passage and patency of anastomosis on contrast-enhanced abdominal X-rays. A: A 57-yearold woman whose esophagojejunal anastomosis functionality and passage continuity were investigated and evaluated as normal on the 4th postoperative day; B: The gastric remnant, position, and functionality were normal in a 37-year-old woman (BMI-47.2) on the 3rd postoperative day after sleeve gastrectomy; C: Zenker’s diverticulum that was unexpectedly detected in a 44-year-old man with gastric resection for gastric cancer, who presented with dysphagia in the postoperative followup period.

        CE-AXR examinations were performed (Figure 5) to describe the continuity of the gastrointestinal transition in patients (n= 43) receiving chemotherapy or developing acute abdomen (intestinal obstruction), or postoperative patients. Definitive diagnosis was made in 27 cases (62%), and additional radiological imaging was required for a definitive diagnosis in 16 cases (Table 1). For patients who were consulted to our clinic with the suspicion of intestinal obstruction, in addition to the routine procedures applied, the passage was evaluated objectively by taking 2-3 spot images with CE-AXR. Medical treatment protocols were applied to cases with the open passage with CE-AXR, and surgical treatment for patients with CE-AXR obstruction (Figure 6). Twenty-two patients were followed with suspected nausea and vomiting (n= 13) or intestinal obstruction (n= 9); 12 of them were radiologically normal, and intestinal obstruction was found in two patients (Figure 7). Additional examinations (CT, gastroscopy, and colonoscopy) were performed on other patients for whom sufficient information could not be obtained with CE-AXR.

        Figure 5 Leakage and perforation on contrast-enhanced abdominal X-rays. A: Contrast material leakage into the abdominal cavity (arrows) due to the peptic ulcer perforation seen on contrast-enhanced abdominal X-ray (CE-AXR) in a 76-year-old woman who cannot be diagnosed by clinical findings; B: CE-AXR in a 57-year-old woman who underwent laparoscopic stromal tumor resection and developed unexpected abdominal pain on the 5th postoperative day showed an opening at the suture line and contrast material leakage (arrows); C: In a 68-year-old woman who underwent hilar resection and portoenterostomy for Klatskin tumor, CE-AXR obtained by administering contrast material through the drain showed the biliary fistula tract and subhepatic pouch (arrows).

        Figure 6 Contrast-enhanced abdominal X-rays showing intestinal obstruction. A: Lateral contrast-enhanced abdominal X-ray (CE-AXR) showed gastric dilation due to gastric outlet obstruction (Arrow) in a 48-year-old woman with persistent nausea and vomiting after pylorus-preserving pancreatoduodenectomy; B: Abdominal cocoon was detected on CE-AXR in a 67-year-old woman who suffered from acute abdomen; C: CE-AXR showed a 74-yearold man who was thought to develop intestinal obstruction due to adhesions (arrow).

        Figure 7 Non-surgical patients’ contrast-enhanced abdominal X-rays for evaluations of intestinal passage continuity. A: A 69-year-old man underwent pancreatoduodenectomy for a pancreas tumor in the 6th postoperative year and presented with persistent nausea and vomiting due to incarcerated intestinal loops collected in a giant incisional hernia; B: It was seen in the right lower quadrant of the abdomen and the intestinal passage was evaluated as normal; C: Normal passage of the contrast material was seen on contrast-enhanced abdominal X-ray in a 59-year-old woman who was treated with chemotherapy and presented with persistent nausea and vomiting.

        The most common causes of failure in imaging on X-rays taken to detect the presence of anastomotic stenosis or leakage were found to be lack of contrast material (amount or concentration) and timing problems (early-late). It was calculated that imaging data contributed positively to the diagnosis, followup, and treatment processes in 98 (74.8%) of the patients with CE-AXR.

        Allergic or renal problems or technical problems related to the administration of contrast material were not encountered.

        DISCUSSION

        Specialists at surgical clinics and intensive care units sometimes need diagnostic procedures that can give quick results or reveal unexpected results. Radiological examinations are the most widely used and accessible diagnostic tools today[5]. Endoscopists and surgeons often make use of scope imaging during their procedures.

        Direct/spot AXRs are mostly used in emergency departments to elucidate the etiology of pain[1,2,6].

        AXRs are typically taken in about half of patients suffering from abdominal pain[4,5]. It has also been reported that most AXRs in emergency departments are unnecessary. It has been reported in the literature that positive X-ray results are detectable in 15.8% to 25% of patients undergoing AXRs[2-4]. Today, a wide variety of contrast agents is also used to eliminate the disadvantages of direct imaging, to obtain better images with modern imaging devices, and to make more accurate interpretations. The use of contrast media has become a common procedure in CT, MR, and USG examinations to better define organ and tissue limits. Positive results were obtained in most of the cases (n= 98, 74.8%) with CE-AXR in our series (Table 1).

        CE-AXRs were originally made to understand the status (patency, stenosis, or leak) of hepaticojejunostomy or portoenterostomies performed only in selected patients undergoing HPB surgery (Figure 1). It has also been used later to describe the current state of patients and when quick decision-making is required.

        The major cause of morbidity and mortality after esophagectomy or total gastric resection is asymptomatic anastomotic leakage. Although routine radiological follow-up is not performed in the early postoperative period, it has been reported that anastomotic leakage can be overlooked even in routine detailed scans[7]. CE-AXR examinations, which we previously performed in selected patients, have recently begun to be routinely performed (Figures 2-4). In patients with fistula, CE-AXR can guide the location, depth, dimensions, and treatment planning of the fistula.

        Intraoperative methylene blue injection through the nasogastric tube is a widely used method[8,9] for checking the tightness of the staple line (leakage) in bariatric and gastrointestinal surgery. Recently, intraoperative indocyanine green has been used for the same purpose[9]. Studies also report a high rate of false negativity in postoperative routine endoscopy or anastomotic leakage screening with methylene blue[10]. In our clinic, methylene blue is routinely used in surgery for the control of tightness in patients undergoing bariatric surgery. While patients were previously given methylene blue on the 3rdor 4thpostoperative day, they have recently been evaluated with CE-AXR taken with oral contrast (Figure 4). We believe that it is a more objective method than evaluation with methylene blue. CE-AXR taken on the 3rdor 4thpostoperative day also gives information about the resection margins (leakage), stomach balance, and passage status at the patient’s discharge time. It also has advantages such as documenting the final status of the patient with the CE-AXR taken and having reference data in the controls to be made.

        Gastric emptying difficulty is a serious problem in patients who have undergone major surgery, especially after pancreatoduodenectomy[11-13]. Patients receiving adjuvant chemotherapy may also experience severe nausea and vomiting from time to time. The underlying cause should be studied in certain patients receiving chemotherapy at the oncology clinic who have treatment-resistant nausea and vomiting. Delayed healing of wounds may occur because of wide incisions, high risk of infection, and chemotherapy, and patients with pancreatoduodenectomy may have more incisional hernias that can reach large sizes. Continuity of transition may be assessed with CE-AXR in patients with giant incisional hernias (Figure 7) and complaints of nausea and vomiting. CE-AXR can also prevent unnecessary surveys, procedures, and laparotomies. There may be evidence to show that the patient has recovered or improved after surgery.

        Nowadays, the largest source of radiation exposure is X-ray imaging equipment used in diagnostic and therapeutic procedures. According to the global calculations, the average amount of natural radiation or exposure to Radon per person is calculated as 2.4 mSv/year (Table 2)[14-19]. More than 500 million radiological imaging examinations are performed annually in the United States. It is calculated that radiation exposure will increase progressively[14,20]. According to BEIR reports, it has been calculated that abdominal sarcoma/carcinoma may develop in one of 550-600 patients who received 20 mSv of radiation in conventional computed tomography scans[15,21]. The amount of radiation exposure caused by AXR (0.7 mSv) is higher than that by chest X-ray (0.02 mSv)[5,21,22]. The amount of radiation exposure with CE-AXR is significantly lower than that with fluoroscopy and CT (Table 2). It has been determined that CE-AXR can be taken with mobile X-ray devices at bedside and in intensive care units. It also accelerates and facilitates decision-making processes and requires no further review.

        Table 2 Effective doses of radiation for various radiological procedures and activities

        CONCLUSION

        Simple and mobile devices can also play a significant role in managing medical and surgical processes. Important data can be obtained using CE-AXR to confirm clinical results, determine status, or rule out a diagnosis or event. In selected cases and series, CE-AXR has many clinical benefits and contributions. These are: (1) Very handy and quick results are available; (2) It is possible to determine whether the entities in question are present or not; (3) It is more appropriate in intensive care units and at bedside; (4) The workload in radiology (CT/MRI) and endoscopy units is reduced; (5) Exposure to irradiation is reduced; (6) The use of radiopaque substances, which have toxic effects on the kidneys and have allergic properties, will decrease; and (7) It may be a benchmark for future medical follow-ups and medicolegal proceedings.

        ARTICLE HIGHLIGHTS

        Research background

        Although abdominal X-rays are one of the most frequently used imaging methods in emergencies, they are not as reliable as expected.

        Research motivation

        The desire to quickly evaluate and know the developments in patients being followed in the surgery clinic and intensive care units prompted us to conduct this study.

        文件查詢功能是用戶對系統(tǒng)存儲的用戶專屬數(shù)據(jù)的查詢,用戶登錄可在文件目錄中查看專屬文件列表,利用FileSystem.listStatus()方法可獲取用戶專屬數(shù)據(jù)的狀態(tài)[4]。通過系統(tǒng)查詢功能設置查詢文件名,利用seacherFiles()方法實現(xiàn)對文件的查詢,查詢功能實現(xiàn)封裝在UserFile類中,部分功能實現(xiàn)的代碼如下:

        Research objectives

        It has been designed especially for imaging at bedside in order to learn the result of the procedure or the existence and dimensions of undesirable situations in a short time.

        Research methods

        Initially, contrast-enhanced abdominal X ray (CE-AXR) was performed to evaluate only biliary tract anastomoses (cholangiography). Evaluation of images (CE-AXR) obtained by the application of catheters, drains, nasogastric tube, or oral contrast agent (iohexol, 300 mg, 50 cc vial) mixed with saline or water in very different clinical situations with satisfactory results (stenosis, patency, functionality, fistula, obstruction,etc.) was performed. File data of patients who underwent CE-AXR in the retrospective observational study were evaluated.

        Research results

        As a result of examining the data of a total of 131 patients, it was determined that CE-AXR, which was performed after liver, biliary tract, pancreas, esophagus, and stomach operations, provided adequate imaging in 74.8% of the cases and contributed to the diagnosis and treatment process. No complications related to the procedure were observed.

        Research conclusions

        CE-AXR is a very simple imaging method that has no side effects. It can be very useful in clinics and intensive care units because it can be done with mobile X-ray devices at bedside and give fast results. It also has advantages such as reducing the burden of the radiology unit and exposure to radiation.

        Research perspectives

        CE-AXR can contribute to the diagnosis and treatment process in patients with upper gastrointestinal (esophagus and stomach) and hepatopancratobiliary surgeries, chemotherapy patients, and cases with persistent nausea-vomiting complaints and suspected intestinal obstruction. Prospective clinical studies are needed to better understand the effectiveness of CE-AXR.

        FOOTNOTES

        Author contributions:Dilek ON was the designer of the study and revised the article critically for scientific content and collected the images; Güne? ? and Atay A participated in the acquisition, analysis, and interpretation of the data, and drafted the initial manuscript; Karahan F and Karasu ? collected and reported the patients’ data and images.

        Institutional review board statement:The study was carried out in accordance with the principles of the Helsinki Declaration. As a routine procedure, written informed consent was obtained from each patient for all procedures and publications. Ethics committee approval was received for this study (2022/GOKAE/0542) from the Clinical Trials Ethics Committee.

        Informed consent statement:All study participants, or their legal guardians, provided informed written consent before study enrollment. The data used in this study did not involve the patients’ privacy information, so the informed consent was waived by the Ethics Committee of University Hospital. All patient data obtained, recorded, and managed were only used for this study, and all patient information is strictly confidential, without any harm to the patient.

        Conflict-of-interest statement:All of the authors declare that there are no conflicts of interest in connection with this paper, and the material described is not under publication or consideration for publication elsewhere.

        Data sharing statement:All of the authors declare that there are no shared data in this paper, and the material described is not under publication or consideration for publication elsewhere.

        STROBE statement:The authors have read the STROBE Statement—checklist of items, and the manuscript was prepared and revised according to the STROBE Statement—checklist of items.

        Open-Access:This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BYNC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is noncommercial. See: https://creativecommons.org/Licenses/by-nc/4.0/

        Country/Territory of origin:Turkey

        ORCID number:Osman Nuri Dilek 0000-0002-6313-3818; Arif Atay 0000-0001-8163-2357; Orgun Gunes 0000-0002-0576-6086; Furkan Karahan 0000-0003-0384-8181; ?ebnem Karasu 0000-0002-0106-5901.

        S-Editor:Liu JH

        L-Editor:Wang TQ

        P-Editor:Zhao S

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