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- Arroyo Vázquez, Jorge Alberto, 1979, et al.
(författare)
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Bacterial colonization of the stomach and duodenum in a Swedish population with and without proton pump inhibitor treatment
- 2020
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Ingår i: JGH Open. - : Wiley. - 2397-9070. ; 4:3, s. 405-409
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Tidskriftsartikel (refereegranskat)abstract
- Background and Aim Microbial contamination of the abdominal cavity is a serious concern during transgastric endoscopic interventions and perforations, particularly in patients who have inhibited gastric acid secretion due to treatment with proton pump inhibitors (PPIs). The aim of this study was to investigate the gastric and duodenal bacterial flora in patients with and without PPI treatment. Methods Patients referred for gastroscopy, without recent antibiotic treatment, were eligible for inclusion. Use of PPIs was recorded. Samples for bacterial culturing were obtained from the antrum of the stomach and from the duodenal bulb through a gastroscope. Positive cultures were examined for bacterial types and subtypes. Biopsies were taken in the antrum for urease test to detect Helicobacter pylori. Results Bacterial cultures from the stomach were obtained from 103 patients, and duodenal samples were also cultured from 49 of them, for a total of 53 patients with PPI use and 50 patients without. Positive gastric cultures were found in 42 of 53 patients with PPI use and in 13 of 50 without (P < 0.0001). Duodenal cultures were positive in 20 of 24 with PPI and 8 of 25 without (P < 0.0001). The most commonly identified bacterial species were oral strains of Streptococcus, followed by Neisseria and Haemophilus influenzae. Of 103 patients, 10 had a positive urease test, indicating H. pylori infection, 1 with PPI and 9 without. Conclusions Bacterial growth in the stomach and duodenum is more common in patients with PPI treatment. The dominating bacterial species found in the stomach and duodenum originates from the oropharynx. Clinical trials registry: Trial registration number 98041 in Researchweb (FoU in Sweden).
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| 2. |
- Arroyo Vázquez, Jorge Alberto, 1979, et al.
(författare)
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Exploring pyloric dynamics in stenting using a distensibility technique
- 2018
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Ingår i: Neurogastroenterology and Motility. - : Wiley. - 1350-1925 .- 1365-2982. ; 30:12
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Tidskriftsartikel (refereegranskat)abstract
- © 2018 John Wiley & Sons Ltd Background: Perforated duodenal ulcers can be treated with a covered stent. Stent migration is a severe complication, sometimes requiring surgery. Pyloric physiology during stent treatment has not been studied and mechanisms for migration are unknown. The aim of this study was to investigate the pyloric response to distention, mimicking stent treatment, using the EndoFLIP. Methods: A nonsurvival study in five pigs was carried out, followed by a pilot study in one volunteer. Animals were gastroscoped during anaesthesia and the EndoFLIP was placed straddling the pylorus. Baseline distensibility readings were performed at stepwise balloon distentions to 20, 30, 40, and 50mL, measuring pyloric cross-sectional area and pressure. Measurements were repeated after administration of a prokinetic drug and after a liquid meal. In the human study, readings were performed in conscious sedation at baseline and after stimulation with metoclopramide. Key Results: During baseline readings, the pylorus was shown to open more with increasing distention together with higher amplitude motility waves. Reaching maximum distention-volume (50mL), pyloric pressure increased significantly (P=0.016), and motility waves disappeared. After prokinetic stimulation, the pressure decreased and the motility waves increased in frequency and amplitude. After food stimulation, the pressure stayed low and the motility showed increase in amplitude. During both tests, the pylorus showed higher pressure and lack of motility waves at maximum probe distention. Conclusions and Inferences: The pylorus seems to act as a sphincter at low distention but when further dilated starts acting as a pump. Fully distended the pyloric motility disappears and the pressure remains high, suggesting that a stent with high-radial force might show less migration.
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| 3. |
- Arroyo Vázquez, Jorge Alberto, 1979
(författare)
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Stent treatment of perforated duodenal ulcer - physiology and clinical aspects
- 2021
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Background The incidence of perforated duodenal ulcer is decreasing but still constitutes a life-threatening complication to peptic ulcer disease. Abdominal contamination from gastric or duodenal content occurs during perforations. Gastric content is normally sterile due to its low pH, but the wide-spread use of PPI might affect gastric bacterial flora. Gold standard treatment is sutured surgical closure, open or laparoscopic. Treatment with a covered stent has proven useful in cases of esophageal perforations. The same treatment strategy might be an option in selected cases with duodenal perforation. Stents placed over the pylorus might influence pyloric motility leading to stent migration. The aim of this thesis was to investigate the use of a covered stent to treat perforated duodenal ulcers including aspects on pyloric physiology and gastric bacterial colonization. Methods Paper I & II: Gastric and duodenal bacterial colonization was investigated taking swab samples from the mucosa for culturing during, clinical outpatient gastroscopies. PPI consumption was recorded. In paper II gastric pH was measured from gastric aspirate and bacterial growth was quantified. Paper III: Pyloric physiology was studied in an animal model using the EndoFLIP™ probe, mimicking a stent placed in the pylorus. Pyloric cross sectional area and pressure was recorded. Paper IV: Randomized clinical trial, patients presenting with signs of upper gastrointestinal perforation and free air on a CT scan were included and randomized to surgical closure or stent treatment. Laparoscopy was performed in all patients to verify the diagnosis. Results Paper I: 103 patients were analyzed. Gastric and duodenal bacterial colonization was more common in patients on continuous PPI treatment (p<0,0001). Dominating bacterial species were of oropharyngeal origin, most common were Streptococcus salivarius & mitis. Paper II: 107 patients were analyzed. Abundant bacterial growth (>104 CFU/ml) occurred in 16% in the stomach and 12% in the duodenum, significantly more in patients with PPI treatment (p<0,0001). Patients with abundant growth showed high gastric pH and old age. Paper III: When pylorus is stepwise dilated, it changes activity from acting as an opening and closing sphincter to a propulsion pump. At full distention, pyloric motility disappears. Pyloric opening and emptying is stimulated by food. Paper IV: 43 patients were included, 28 had a verified perforated duodenal ulcer, 15 randomized to surgical closure and 13 to stent treatment. Morbidity was 42% overall, 6 patients in each group had a complication of Clavien-Dindo grade 2-4 (n.s.). Mortality was 4% (n=1). For all patients, time from onset to intervention >12h correlated with complications Clavien-Dindo grade 3-5. Conclusion Bacterial flora found in the stomach and/or duodenum is mainly of oropharyngeal origin, more frequently occurring in patients with ongoing PPI treatment. Individuals with high gastric pH are more at risk for abundant gastric and/or duodenal bacterial colonization. Stent design influences pyloric motility, through pyloric distention, and seems to be of importance to avoid stent related complications. Stent treatment of perforated duodenal ulcer seems to be as safe and effective as surgical closure.
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| 4. |
- Arroyo Vázquez, Jorge Alberto, 1979, et al.
(författare)
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Stent treatment or surgical closure for perforated duodenal ulcers: a prospective randomized study.
- 2021
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Ingår i: Surgical endoscopy. - : Springer Science and Business Media LLC. - 1432-2218 .- 0930-2794. ; 35, s. 7183-7190
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Tidskriftsartikel (refereegranskat)abstract
- Perforated peptic ulcer is a life-threatening condition. Traditional treatment is surgery. Esophageal perforations and anastomotic leakages can be treated with endoscopically placed covered stents and drainage. We have treated selected patients with a perforated duodenal ulcer with a partially covered stent. The aim of this study was to compare surgery with stent treatment for perforated duodenal ulcers in a multicenter randomized controlled trial.All patients presenting at the ER with abdominal pain, clinical signs of an upper G-I perforation, and free air on CT were approached for inclusion and randomized between surgical closure and stent treatment. Age, ASA score, operation time, complications, and hospital stay were recorded. Laparoscopy was performed in all patients to establish diagnosis. Surgical closure was performed using open or laparoscopic techniques. For stent treatment, a per-operative gastroscopy was performed and a partially covered stent was placed through the scope. Abdominal lavage was performed in all patients, and a drain was placed. All patients received antibiotics and intravenous PPI. Stents were endoscopically removed after 2-3weeks. Complications were recorded and classified according to Clavien-Dindo (C-D).43 patients were included, 28 had a verified perforated duodenal ulcer, 15 were randomized to surgery, and 13 to stent. Median age was 77.5years (23-91) with no difference between groups. ASA score was unevenly distributed between the groups (p=0.069). Operation time was significantly shorter in the stent group, 68min (48-107) versus 92min (68-154) (p=0.001). Stents were removed after a median of 21days (11-37 days) without complications. Six patients in the surgical group had a complication and seven patients in the stent group (C-D 2-5) (n.s.).Stent treatment together with laparoscopic lavage and drainage offers a safe alternative to traditional surgical closure in perforated duodenal ulcer. A larger sample size would be necessary to show non-inferiority regarding stent treatment.
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