View clinical trials related to Colonoscopy.
Filter by:It is estimated that there are about 1.4 million patients with colorectal cancer (CRC) worldwide, with a rising trend in CRC incidence in many Asian Pacific countries. In Hong Kong, colorectal cancer ranks first in cancer incidence and second in cancer mortality based on data from 2014. CRC is one of the most preventable cancers because its development in general follows an adenoma-carcinoma sequence. Adenomas are considered precursor lesions for CRC. Recent guidelines from USA, Europe and Asia Pacific region recommend CRC screening for average-risk asymptomatic individuals starting at age 50. Modalities such as guaiac-based fecal occult blood tests (gFOBT), fecal immunochemical tests (FIT), flexible sigmoidoscopy (FS), and colonoscopy are among the acceptable options for CRC screening. While early detection and removal of colorectal adenoma by screening colonoscopy with polypectomy reduce CRC incidence and mortality, interval cancers (cancers that develop after a colonoscopy and before the next scheduled colonoscopy) may still occur and were reported to account for up to 10.5% of CRC. a CRC has been associated with proximal colon location, small lesion, flat lesion, missed lesion, inadequate examination, incomplete resection of lesion, tumor biology, and low adenoma detection rate (ADR). High ADR (eg, ≥ 20%) has been associated with a reduced risk of interval CRC. Bowel preparation includes diet restriction and proper use of laxative before the colonoscopy, and this is one of the important factors to ensure a high quality colonoscopy. Suboptimal bowel preparation may lead to decreased ADR, cecal intubation rate, and surveillance interval and increased procedural time. Efforts to improve bowel cleansing quality through traditional communication routines, including face-to-face verbal education, written booklet or visual aids or telephone-based re-instruction have proven to be useful. A recent study using WeChat, a widely used social media mobile app in China, has also shown to be effectively improving bowel preparation level of a mixed population who received diagnostic (77%), screening (15.8%) and surveillance (7.2%) colonoscopy. However, the impact of social media mobile app on the bowel preparation level of screening colonoscopy is not yet known. Hence, this study will investigate the effectiveness of the most popular social media app worldwide, WhatsApp in bowel preparation level of screening colonoscopy.
This Clinical Trial is being conducted to study the effect of oral simethicone on the presence of bubbles during colonoscopy. The purpose of this study is to find out what effects (good and bad) the addition of oral simethicone to bowel preparation has on the ability to visualize the colon mucosa (bowel) during colonoscopy.
It is standard practice in the United States and many parts of world to perform Gastrointestinal (GI) endoscopy with the patient under deep sedation. Obesity is accepted as a patient specific risk factor for hypoxic events during procedural sedation for GI endoscopic procedures. The Obese population has a higher prevalence of obstructive sleep apnea (OSA) which is characterized by repeated obstruction of the upper airway, and leads to apnea and desaturation. This prospective, randomized study was designed to compare the effectiveness of the high flow nasal cannula and the standard nasal cannula in morbidly obese (BMI > 40) patients receiving deep intravenous sedation during colonoscopies. This study will assess whether use of the high flow nasal cannula (HFNC) leads to less intraoperative desaturation events compared to the current standard of care.
About 30% of patients were reported to suffer inadequate bowel preparation. So, it is desirable to prescribe personalized regimen according to patient's personal characteristics.
In this double-blind, randomised and controlled study 150 Patients referred to colonoscopy were assigned to either CO2 or air insufflation. We recorded basic characteristics of colonoscopy and the amount of drugs used for sedation. Patients and investigators filled out questionnaires to record pain, abdominal bloating and flatulence.
Nasal continuous positive airway pressure (nCPAP) has been shown to effectively relieve upper airway obstruction in patients with OSA as it creates a pneumatic stent in the hypopharynx that reduces obstruction and allows for continuous oxygenation. Nasal ventilation was also proven to be more effective than combined oral-nasal ventilation during induction of general anesthesia in adult subjects. However, it is not clear if nasal mask can be used safely for oxygenation and ventilation in patients undergoing colonoscopy. The SuperNO2VA™ device is a new commercially available nasal mask that provides both nasal CPAP and nasal mask ventilation. The objective of this study is to compare the efficacy of oxygenation and ventilation during colonoscopy using the novel nasal mask, SuperNO2VA™, and standard care with nasal cannula.
An ideal sedative for colonoscopy should have properties that include: rapid onset and offset of action, provide cardiopulmonary stability, have minimal adverse effects, and allow for smooth recovery, and early discharge. Propofol is often used solely because of its rapid onset and short duration of action---a property which is ideal for a fast recovery and early discharge in the ambulatory setting. However, the use of propofol has been associated with undesirable effects such as hypotension, hypoventilation and apnea requiring assisted ventilation. Balanced anesthesia, using a combination of medications with different mechanisms of action can reduce the total amount of each sedative agent used and minimize their side effects while achieving the desired level of sedation. Dexmedetomidine is one agent that has been used either alone or in combination with propofol for sedation during colonoscopy. While there are many advantages to using dexmedetomidine, there is concern that the use of this agent for sedation during colonoscopy may prolong post-operative recovery time and readiness for discharge home. No study has definitively assessed whether the use of dexmedetomidine in combination with propofol during ambulatory colonoscopy prolongs post-operative recovery time as determined by the Modified Post Anesthesia Discharge Scoring System (MPADSS).
In patients with central obesity, the effect of the abdominal corset on colonoscopy completeness, cecum and ileum intubation time will be investigated.
Type 2 diabetes is rapidly increasing globally and has been associated with an increased risk of colorectal cancer. Therefore, the numbers of diabetic patients who will undergo colonoscopic screening are expected to grow exponentially. Colonoscopic preparation entails prolonged fasting, cessation of anti-diabetic medication and ingestion of preparation medications. This may put the diabetic patient at risk of potentially dangerous hypo- or hyperglycemia. However, studies regarding the safety of colonoscopic preparation in diabetic are lacking. In this study, the investigators aim to discover the prevalence of abnormal glucose levels in diabetic patients who undergo colonoscopy. The investigators also aim to find out risk factors for abnormal glucose levels and develop a safe preparation protocol.
The objective of this study is to evaluate the safety and efficacy of BLI4700 as a bowel preparation prior to colonoscopy in adult patients.