Multicenter Prospective Randomized Clinical Trial Comparing Endoscopic Retrograde Appendicitis Therapy (ERAT) vs Antibiotic Therapy vs Appendectomy for Treatment of Uncomplicated Acute Appendicitis
试验速览
- 阶段
- 2 期
- 入组人数
- 240
- 试验地点
- 3
- 主要终点
- duration of abdominal pain
研究概览
简要总结
Endoscopic retrograde appendicitis therapy (ERAT) is a new and minimally invasive method for the diagnosis and treatment of acute appendicitis.After a positive diagnosis of acute appendicitis is established by either colonoscopic direct-vision imaging or fluoroscopic endoscopic retrograde appendicography (ERA) imaging in patients with suspected acute appendicitis, the procedures to relieve the appendiceal lumen obstruction including appendiceal luminal irrigation, appendicolith removal, and stenting for drainage whenever necessary will be carried out. In this multicenter prospective randomized clinical trial, the patients with uncomplicated acute appendicitis will be divided into three groups randomly: ERAT group, antibiotic therapy group and appendectomy group. The primary outcome is duration of abdominal pain. The secondary outcomes include mean hospital stay, mean operative time, duration of fever, duration of leukocytosis, bed time, rate of complication, rate of recurrence and rate of appendectomy during follow-up period of 1 year.
详细描述
Intervention
The patients with uncomplicated acute appendicitis will be divided into three groups randomly: ERAT group, antibiotic therapy group and appendectomy group.
- ERAT group: In preparation for ERAT, low-pressure cleansing enemas (500 mL normal saline solution per enema) will be administered for three times before the procedures for bowel preparation. Antibiotic therapy (levofloxacin + metronidazole) will be intravenously administrated to the patients in the perioperative period.
The procedures of ERAT will be performed as below：
- Cannulation of the appendiceal lumen: Colonoscopic examination under direct vision of the whole colon, ileocecal junction and terminal ileum will be performed to exclude other abnormalities first, and focus on the appendiceal orifice and the surrounding mucosa. Colonoscope attached by a transparent cap will be positioned close to the appendiceal orifice. Gerlach's valve will be pushed aside using the transparent cap, a standard catheter loaded with a 0.035-inch guidewire (loop-tip or hydrophilic-tip) will be placed in the appendiceal orifice. The guidewire will be probed gently to insert into the appendiceal lumen. The catheter will be then subsequently moved forward after the guidewire inserting deeply into the lumen under fluoroscopic guidance.
- Endoscopic retrograde appendicography (ERA): After cannulation of the appendiceal lumen, decompression of lumen will be achieved by suction using a 5-mL syringe attached to the catheter. A soluble contrast agent (iobitridol) will be then used to fill the appendix while being monitored by fluoroscopy to check the radiographic features of the appendix (including position, length, contour, mobility, intraluminal content and inner diameter of appendiceal lumen).
- Irrigation and appendicolith removal: The appendiceal lumen will be irrigated with normal saline solution to clear away the pus and the sand-like appendicoliths, while the large appendicoliths will be extracted using a balloon catheter or an extraction basket.
- Stenting for drainage: If the pus is massive or the lumen is stenosis, a plastic straight stent (8.5F) will be placed into the lumen over the guidewire for luminal decompression with the plan to retrieve the stent after about one week.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 12 Years 至 75 Years（Child, Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •patients with Alvarado scores ≥7 (with or without US/CT) diagnosed of uncomplicated acute appendicitis
- •patients with Alvarado scores <7 but US/CT suggested uncomplicated acute appendicitis or could not exclude acute appendicitis.
排除标准
- •perforated appendicitis
- •periappendiceal abscess
- •contraindications for colonoscopy
- •allergy to contrast media or iodine
- •pregnancy
- •unable to cooperate or provide informed consent
研究组 & 干预措施
Antibiotic therapy group
The patients will be treated with intravenous broad-spectrum antibiotics (Ertapenem 1g/d) for 3 days and oral antibiotics (Levofloxacin 500mg once daily and Metronidazole 500mg 3 times per day) for 7 days. If patients in the antibiotic group deteriorate during the hospital stay (suspicious perforation or any symptoms of peritonitis) patients will be operated.
干预措施: Ertapenem, Levofloxacin and Metronidazole (Drug)
ERAT group
The patients will receive emergent endoscopic retrograde appendicitis therapy (ERAT).
干预措施: Endoscopic retrograde appendicitis therapy (ERAT) (Procedure)
Appendectomy group
The patients will receive laparoscopic appendectomy according to standard routines.
干预措施: Appendectomy (Procedure)
结局指标
主要结局
duration of abdominal pain
时间窗: up to 10 days
次要结局
- rate of appendectomy(during follow-up period of 1 year)
- bed time(up to 10 days)
- rate of complication(during follow-up period of 1 year)
- rate of recurrence(during follow-up period of 1 year)
- mean hospital stay(up to 10 days)
- duration of leukocytosis(up to 10 days)
- duration of fever(up to 10 days)