Arterial oxygen saturation during upper gastrointestinal endoscopy in elderly patients: the role of endoscope diameter

[Digestive system endoscopy in the elderly and in patients with severe comorbidities]

Besides the technical equipment, the endoscopic team's theoretical and practical skills, the success of endoscopic intervention is influenced by the patient's general condition. Advanced age, severe co-morbidities may increase the risk, especially in case of operative endoscopy. The decision is more complicated when alarm symptoms urge the examination. The endoscopic examination of digestive system, biliary track and pancreas in advanced age can safely be performed as alternatives of surgical intervention. It is important to know the exact stage of cardiovascular and pulmonary diseases, besides, in case of stroke the patient's cooperation is very important. In everyday practice the most common problems are the endoscopic examination of the patient in oral anticoagulant and/or thrombocyte aggregation inhibition therapy and the question of suspending, modifying or restarting the therapy. Examining the patients with implanted electronic device as well as antibiotic prophylaxis in expanding range of indications are special issues. The gastroenterologist makes the decision based on the knowledge of the endoscopic intervention, the patient's risk classification, the indications, the contradictions and the alternative diagnostic possibilities. This review attempts to give an overview with some practical aspects.

Endoscopy in the elderly: a review of the efficacy and safety of colonoscopy, esophagogastroduodenoscopy, and endoscopic retrograde cholangiopancreatography

Gastrointestinal endoscopy including colonoscopy, esophagogastroduodenoscopy, and endoscopic retrograde cholangiopancreatography (ERCP) are safe and efficacious in elderly patients. Screening colonoscopies have little efficacy in patients over 80 years. Colonoscopies performed for bleeding or iron-deficiency anemia have a higher yield in elderly patients. Colonic preparations were well tolerated and colonoscopic success rates are high in elderly patients. However, poor colonic preparation is more likely in these patients. Esophagogastroduodenoscopy is a high-yield procedure with no significant increase in adverse events in patients over 80 years with symptoms including dyspepsia and dysphagia. ERCP in the elderly carries a high degree of success with low complication rates. Elderly patients undergoing ERCP carry similar risks of bleeding and perforation and a lower risk of pancreatitis compared with younger patients. Advanced age should not be regarded as an absolute contraindication to any gastrointestinal endoscopy procedure.

Predictive factors of oxygen desaturation of patients submitted to endoscopic retrograde cholangiopancreatography under conscious sedation

BACKGROUND AND AIMS

Hypoxemia can occur during endoscopic retrograde cholangiopancreatography probably induced by the analgesia and sedation done. Moreover the patients prone position difficults the adequate ventilation. The hypoxemia and hypoventilation may not be noticed by nursing staff. A transversal study was used to investigate possible predictive factors of oxygen desaturation in sedated patients with midazolam associated to meperidine undergoing endoscopic retrograde cholangiopancreatography.

PATIENTS AND METHODS

A total of 186 patients were monitored with continuous pulse oximetry. Poisson regression was used to measure the independent effect of each factor adjusted for effects of each of the other factors. The variables studied were: age, gender, hematocrit and hemoglobin levels, scopolamine use, diagnostic or therapeutic exam, American Society of Anesthesiologists Scores (ASA), duration time of exam, sedative used midazolam in the average of 0.07 mg/kg and analgesic drug meperidine in the average of 0.7 mg/kg that was titrated according patients reaction.

RESULTS

No desaturation was found in 113 (60.8%) patients, mild desaturation (SpO2 <92%) in 22 (11.8%) and severe desaturation (SpO2 <90%) in 51 (27.4%). This desaturation was recognized only by the pulse oximeter. There was no need to use any antagonist drug of the sedatives in patients who had severe desaturation, they were just stimulated to deep breaths and oxygen was offered at 2 liters per minute via catheter. The variables found to predict desaturation were age >60 years old and ASA score III. The duration of exam was barely significant for desaturation.

CONCLUSIONS

The variables of age of 60 years old or more, and ASA III score are identified as increased risk for desaturation for patients who undergo endoscopic retrograde cholangiopancreatography under conscious sedation. Long time of exam suggests the patient oxygen desaturate. Such patients require very close monitoring to desaturation and hypoventilation by the assistants and nursing staff alerting to respiratory depression. The use of pulse oximeter and asking for deep breaths during the exam helps to diminish such risks.

Endoscopy in the elderly patient

In the elderly who require endoscopy for diagnosis and /or intervention, the endoscopist should be aware of the special risks related to the presence of concomitant systemic diseases. This is especially pertinent in the use of sedatives and analgesics due to the altered physiological functions related to ageing. This can be further complicated by the fact that elderly patients are often prescribed multiple drugs, which makes for the possibility of serious drug interactions. Endoscopy is a minimally invasive technique that is safer than conventional surgery in many conditions. The endoscopist must take into consideration the important factors related to quality of life, as well as the wishes of the patients and their families. The endoscopist must be sympathetic to their wishes and realize when investigation and treatment are not appropriate.

[Unexplained weight loss in the elderly: role of gastric fibroscopy, study of a cohort of 77 patients with a 13-month follow-up]

PURPOSE

In case of unexplained weight loss, chest X-ray, abdominal ultrasonography and gastroscopy are usually recommended. However, gastroscopy is not usually performed in elderly patients.

METHODS

We evaluated 77 patients (mean age: 80 +/- 8 years) hospitalized in our geriatric unit between January 1995 and May 1997 for unexplained weight loss. All patients underwent chest X-ray, abdominal ultrasonography and gastroscopy.

RESULTS

These investigations led to diagnosis in respectively 17, 15 and 46 patients. The etiology of weight loss was unique in 47 patients, while in 30 other patients at least two or three causes could be described. Gastroscopy appeared to be the most useful test, as it allowed description of eight cases of cancer, 29 cases of peptic ulcer, two cases of candidosis, and one case of actinomycosis in patients who did not present any clinical sign.

CONCLUSION

Sixty-five patients were followed-up for a mean period of 13 +/- 21 month; 33 patients died. The condition of 23 patients improved either slightly or definitely. Simple investigations led to diagnosis in 95% of the cases. However, 42% of the patients died within 3 months. Gastroscopy appears to be the most valuable test, leading to diagnosis in more than half of the cases. With adapted treatment, the condition of 75% of the patients with gastro-intestinal lesions improved.