Upper gastrointestinal bleeding due to esophageal varices and hemostasis methods

Posted by Master, Doctor Mai Vien Phuong - Gastrointestinal Endoscopy - Department of Medical Examination & Internal Medicine - Vinmec Central Park International Hospital

Abbreviations:
Upper Gastrointestinal Bleeding (UGIB)
Varicose Vein Upper Gastrointestinal Bleeding (NVUGIB)
Varicose Upper Gastrointestinal Bleeding (VUGIB)
Upper Gastrointestinal Bleeding is defined as bleeding originating from the esophagus to the ligament of Treitz of the duodenum and is classified as gastrointestinal bleeding not due to ruptured varices and bleeding due to ruptured varices.

Upper gastrointestinal bleeding from varicose veins remains a common clinical problem globally. It is associated with high mortality, morbidity and costs of the health care system. Despite the continued improvement of therapeutic endoscopy, the 30-day rate of recurrent bleeding and associated mortality is an ongoing problem. The Food and Drug Administration currently has approved conventional or conventional therapeutic endoscopic modalities including epinephrine injection, argon coagulation, heating probes, and OTSC bronchoscope clamps, which can used alone or in combination to reduce the risk of bleeding.

Recently, new advanced endoscopic devices have received more attention for initial treatment of bleeding lesions and as an adjunct when conventional therapies fail to achieve hemostasis. This review highlights emerging endoscopic modalities used in the management of upper gastrointestinal bleeding due to varicose veins such as over-the-scope clips (OTSCs), Coagrasper, hemostatic sprays, and excision. Radiofrequency ablation, cryotherapy, endoscopic flexible gastrointestinal suture devices and endoscopic ultrasound therapy for arterial occlusion.

Gastrointestinal bleeding is a medical emergency that leads to significant morbidity, mortality, and healthcare costs. It may present as a life-threatening major hemorrhage or chronic silent bleeding. Upper gastrointestinal bleeding (UGIB) is defined as any gastrointestinal bleeding that originates above the ligament of Treitz. UGIB can be further classified as varicocele upper gastrointestinal bleeding (NVUGIB) and varicocele upper gastrointestinal bleeding (VUGIB). Common causes of varicocele-related upper gastrointestinal bleeding are listed in Table 1. The morbidity and mortality associated with varicose veins-related upper gastrointestinal bleeding have decreased as a result of advances. in the prevention and management of upper gastrointestinal bleeding due to varicose veins. However, it remains a common clinical problem with an annual incidence of about 90-108 per 100000 and a mortality rate of 3% to 14%.
Table 1 Etiology of upper gastrointestinal bleeding due to ruptured varicose veins.

Early endoscopic intervention within 24 h of presentation significantly improved patient outcomes and was not significantly different from those who received endoscopic intervention < 12 h after symptom onset. When endoscopy is performed, it is important to have a standard method for diagnosing the cause of bleeding, assessing for signs of recent bleeding (i.e. active bleeding, visible blood vessels). presence of blood clots, red or black spots covering the ulcerative lesion) and gastric ulcer classification according to the Forrest classification. Endoscopy is important in revealing the etiology of varicose veins in the upper gastrointestinal tract.
4.1. Traditional method - epinephrine hemostasis The development and widespread use of endoscopy has contributed mainly to reducing the need for surgery and the morbidity associated with varicose veins in the upper gastrointestinal tract. Endoscopic management is classified as injectable, thermal, and mechanical. Among the traditional methods, epinephrine injection is the most common and widely used modality because of its feasibility to perform and the need for less coordination between the endoscopist and assistant. However, epinephrine alone is less effective than in combination with heat or mechanical and other monotherapy such as forceps, transducers, and electrodynamics.

4.2. Injection of hemostatic epinephrine + endoclip hemostatic forceps According to the Cochrane review, combination therapy is associated with a significant reduction in the risk of bleeding, surgery, and mortality in peptic ulcers with active bleeding. extreme or high-risk signs such as blood clots. Through the laparoscope, endoclips have been found to be effective and safe mechanical hemostatic devices when applied precisely as monotherapy or in combination. The forceps grasps the submucosal vessel, sealing the defect in the target vessel with or without approximating the sides of the lesion.
Furthermore, tissue damage is minimal with clips and ulcer healing is unhindered. Introduced in clinical practice in the 1990s, over the years, the endoclip has evolved in functionality (such as accuracy, tensile strength, rotation, overshoot, and closure strength). ), physical characteristics and cost. The recently published study by Wang et al compared the function of five different types of hemostatic forceps. According to the research results, Resolution 360 (Boston Scientific, Marlborough, Mass) was the fastest clip recorded by surgeons. Instinct (Cook Medical, Bloomington, Ind.) was found to be mechanically stronger and works better at compressing thick, fibrous tissues and scarred ulcers. Rotation and jerking (defined as >30° and >1 half a turn, respectively) tend to occur when clips are rotated in the same direction. As for the clip firing rate, the 16mm SureClip performs well when compared to other through-pipe clamps.

Despite continuous improvements, traditional therapies are sometimes ineffective in initially controlling or preventing bleeding, rates reported to be as high as 10%-24%. Posterior duodenal wall ulcer or lesser curvature ulcer, active bleeding endoscopically, ulcer larger than 2 cm in diameter, or with vessel diameter > 2 mm are some of the major predictors of bleed. In the past decade, the development and research of endoscopic methods has received much attention to achieve hemostasis and overcome the limitations of traditional endoscopic methods. Tables 2 and 3 summarize emerging endoscopic modalities for the management of varicocele upper gastrointestinal bleeding.
Table 2: Summary of new endoscopic modalities for the management of varices-associated upper gastrointestinal bleeding.

Pros and cons of new endoscopic treatment modalities
Table 3 Summary of the pros and cons of emerging endoscopic modalities for the treatment of non-deforming gastrointestinal bleeding.

EVL: Laparoscopic elastic band ligation; GAVE: gastric vascular dysplasia; EUS: Endoscopic Ultrasound; GI: Digestion; RFA: High frequency electric heating; ESD: Endoscopic submucosal dissection; OTSC: Endoclip at the tip of the bronchoscope.
Over the past two decades, mortality and morbidity from variceal upper gastrointestinal bleeding have decreased sharply due to significant advances in therapeutic endoscopic therapy. The use of devices such as the bronchoscope clamp system, Coagrasper, Hemospray powder and laparoscopic suture has greatly evolved and expanded to achieve hemostasis as a primary method or when therapeutic devices Conventional methods such as thermal probes, endoclip hemostatic clips, or epinephrine injections do not control bleeding.

References
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