Publications by authors named "Brian Hanson"

Background: Having a sufficient number of gastroenterologists is important for protecting the digestive health of veterans. However, gastroenterology is among the most difficult medical specialties for recruitment at the US Department of Veterans Affairs (VA).

Methods: We surveyed VA gastroenterology section chiefs to learn about current barriers to recruitment and retention and to identify opportunities for improvement.

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Inadequate bowel preparation is common despite various preprocedure interventions. There is a need for an intervention at the time of colonoscopy to combat poor preparation. In this retrospective, observational study of 46 patients, we evaluated the clinical efficacy and feasibility of implementing the third generation of the Pure-Vu EVS System, a US Food and Drug Administration-cleared over-the-scope-based intraprocedural cleansing device, into our practice at the Minneapolis VA Medical Center (Minneapolis, Minnesota, United States).

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Kansas State University (KSU) Engineering Extension conducted an abridged evaluation of eight consumer grade digital radon monitors. Using the KSU secondary radon chamber, these devices were exposed to three different radon concentrations for 7 d in average household temperature and relative humidity conditions. The three different radon concentration ranges used were: 12.

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Background: Topical hemostatic powder is a mineral powder that forms an adherent barrier and coagulates active bleeding in the gastrointestinal (GI) tract. Hemospray is the first hemostatic powder approved by the Food and Drug Administration (FDA) in the United States. Hemospray has been increasingly used to manage GI bleeding.

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Introduction: Chronic idiopathic constipation (CIC) is a common disorder associated with significant impairment in quality of life. This clinical practice guideline, jointly developed by the American Gastroenterological Association and the American College of Gastroenterology, aims to inform clinicians and patients by providing evidence-based practice recommendations for the pharmacological treatment of CIC in adults.

Methods: The American Gastroenterological Association and the American College of Gastroenterology formed a multidisciplinary guideline panel that conducted systematic reviews of the following agents: fiber, osmotic laxatives (polyethylene glycol, magnesium oxide, lactulose), stimulant laxatives (bisacodyl, sodium picosulfate, senna), secretagogues (lubiprostone, linaclotide, plecanatide), and serotonin type 4 agonist (prucalopride).

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Introduction: Chronic idiopathic constipation (CIC) is a common disorder associated with significant impairment in quality of life. This clinical practice guideline, jointly developed by the American Gastroenterological Association and the American College of Gastroenterology, aims to inform clinicians and patients by providing evidence-based practice recommendations for the pharmacological treatment of CIC in adults.

Methods: The American Gastroenterological Association and the American College of Gastroenterology formed a multidisciplinary guideline panel that conducted systematic reviews of the following agents: fiber, osmotic laxatives (polyethylene glycol, magnesium oxide, lactulose), stimulant laxatives (bisacodyl, sodium picosulfate, senna), secretagogues (lubiprostone, linaclotide, plecanatide), and serotonin type 4 agonist (prucalopride).

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Gastrointestinal bleeding secondary to malignancy can be difficult to manage with traditional endoscopic therapies. Endoscopic suturing is a relatively new technology with limited data available regarding its use for bleeding related to peptic ulcer disease. We describe a case where endoscopic suturing was successfully used to control gastrointestinal hemorrhage from a previously known malignant ulceration that was refractory to traditional interventions.

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Esophageal adenocarcinoma (EAC) develops in a step-wise manner, from low-grade dysplasia (LGD) to high-grade dysplasia (HGD), and ultimately to invasive EAC. However, there remains diagnostic uncertainty about LGD and its risk of progression to HGD/EAC. The aim is to investigate the role of Ki-67, immune-histochemical marker of proliferation, surface expression in patients with confirmed LGD, and risk stratify progression to HGD/EAC.

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Endoscopic ultrasound-guided fine-needle biopsy (EUS-FNB) is an excellent modality for tissue acquisition and has been shown to be superior to EUS-fine-needle aspiration in several studies. Although tissue sampling of lung nodules using EUS-fine-needle aspiration has been reported in the literature, the use of EUS-FNB for tissue acquisition of parenchymal lung mass has rarely been reported in the literature. Our report highlights that EUS-FNB is safe and effective for lung lesions that are near the esophageal wall.

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Adenocarcinomas of the esophagus (EAC), stomach [gastric adenocarcinoma (GAC)], and colorectal carcinoma (CRC) frequently show similar morphology because upper gastrointestinal tumors (GITs) usually evolve from pathologies involving intestinal metaplasia. Upper and lower GIT may also show overlapping immunophenotypes when using the traditional CK7, CK20, and CDX2 panel, which in patients presenting with metastatic disease of unknown origin may lead to misdirected diagnostic workup and/or therapy. We compared the phenotype of upper and lower GIT using an expanded immunohistochemical panel that included the traditional and newer gastrointestinal markers: SATB2, DcR3, MUC5AC, and MUC6.

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Purpose: This evidence-based guideline intends to support clinicians, patients, and others in decisions regarding the treatment of constipation in patients with cancer.

Methodologic Approach: An interprofessional panel of healthcare professionals with patient representation prioritized clinical questions and patient outcomes for the management of cancer-related constipation. Systematic reviews of the literature were conducted.

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Problem Identification: A systematic review and meta-analysis was conducted to inform the development of national clinical practice guidelines on the management of cancer constipation.

Literature Search: PubMed®, Wiley Cochrane Library, and CINAHL® were searched for studies published from May 2009 to May 2019.

Data Evaluation: Two investigators independently reviewed and extracted data from eligible studies.

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Patients with Barrett's esophagus (BE) are at increased risk of esophageal adenocarcinoma (EAC). The risk is largely based on the degree of dysplasia. Dysplasia cannot always be differentiated from inflammatory changes, and therefore may be classified as indefinite for dysplasia (IND).

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Objectives: Many studies have shown poor reproducibility among pathologists for diagnosing dysplasia in Barrett's esophagus (BE). Immunohistochemical stains (IHC) are not widely used due to overlapping expression patterns in reactive and dysplastic processes. We hypothesized that markers involved in cell-cycle (cyclin D1, Ki-67, P16), differentiation/cell-cell interaction (β-catenin, SATB2 CD44, OCT4) and senescence (γH2AX) would produce different results in reactive and dysplastic processes.

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When ordering diagnostic tests, physicians are faced with a problem of not too many tests, not too few, but 'just right'. However, in medical diagnostics 'just right' may be very difficult to identify. Such is the conundrum presented in study by Rubenstein and colleagues regarding appropriate use of repeat esophagogastroduodenoscopy (EGD) in Veterans Health Administration (VHA) medical facilities.

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Obscure gastrointestinal bleeding (GIB) in patients with continuous-flow left ventricular assist devices (CF-LVAD) is common. Capsule endoscopy (CE) can be used in the diagnosis of obscure GIB. Safety and outcomes of CE in patients with CF-LVAD are unknown.

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Background: Cytomegalovirus (CMV) is a double-stranded DNA virus and a member of the Herpesviridae family. It is a lytic virus that causes a cytopathic effect in vitro and in vivo. CMV affects nearly all humans, with a 60%-100% seroprevalence worldwide, and in the immunocompetent it typically manifests as a mild and self-limiting mononucleosis syndrome.

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