Effect and Safety of Polyethylene Glycol Combined With Linaclotide on Colon Cleansing for Patients With Chronic Constipation

Inclusion Criteria: * Inclusion criteria included: The inclusion criteria were patients ≥18 years old suffering from≥2 of the following criteria of chronic constipation under the Rome IV standard: straining, hard stool, residual stool feeling, occlusion feeling, manual bowel movement(BM) performed ≥25% of overall BMs, and BM frequency\<3 times a week . A chronic status was defined as symptoms being present for at least six months, with the symptoms described above being present for at least three months. Exclusion Criteria: * Exclusion criteria included: (1)age \<18 or\> 75; (2) severe chronic renal failure, severe congestive heart failure and Liver dysfunction ;(3)with uncontrolled hypertension, diabetes, intestinal obstruction, intestinal perforation and electrolyte disorders, inflammatory intestinal disease and other organic gastrointestinal diseases;(4)with neurologic, endocrine, or metabolic disorders;(5)treatment with other gastrointestinal drivers, laxatives, and antilaxatives within nearly 2 weeks;(6)history of colorectal surgery;(7) dysphagia; (8) compromised swallowing reflex or mental status;(9)with consciousness disorders or examination intolerance;(10)pregnancy or lactation;(11)allergic to the drug composition;(12)Suspected history of alcohol or substance abuse; (13)Recent participants in clinical trials; (14) unable to give informed consent.