| 1. |
- Forsvall, Andreas, et al.
(författare)
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Evaluation of the Forsvall biopsy needle in an ex vivo model of transrectal prostate biopsy - a novel needle design with the objective to reduce the risk of post-biopsy infection
- 2021
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Ingår i: Scandinavian Journal of Urology. - : Medical Journals Sweden AB. - 2168-1805 .- 2168-1813. ; 55:3, s. 227-234
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Tidskriftsartikel (refereegranskat)abstract
- Background Transrectal prostate biopsy (TRbx) transfers colonic bacteria into prostatic tissue, potentially causing infectious complications, including sepsis. Our objective was to determine whether biopsy needle shape, surface properties and sampling mechanism affect the number of bacteria transferred through the colon wall, and evaluate a novel needle with improved properties. Methods The standard Tru-Cut biopsy needle used today was evaluated for mechanisms of bacterial transfer in a pilot study. A novel Tru-Cut needle (Forsvall needle prototype) was developed. TRbx was simulated using human colons ex-vivo. Four subtypes of the prototype needle were compared with a standard Tru-Cut needle (BARD 18 G). Prototype and standard needles were used to puncture 4 different colon specimens in 10 randomized sites per colon. Needles were submerged into culture media to capture translocated bacteria. The media was cultured on blood agar and then the total amount of transferred bacteria was calculated for each needle. The primary outcome measure was the percent reduction of bacteria translocated by the prototype needles relative to the standard needle. Secondary outcome measures were the effects of tip design and coating on the percent reduction of translocated bacteria. Results Prototype needles reduced the number of translocated bacteria by, on average, 96.0% (95% confidence interval 93.0-97.7%; p < 0.001) relative to the standard needle. This percent reduction was not significantly affected by prototype needle tip style or surface coating. Conclusions The Forsvall needle significantly reduces colonic bacterial translocation, suggesting that it could reduce infectious complications in prostate biopsy. A clinical trial has been initiated.
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| 2. |
- Forsvall, Andreas
(författare)
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Improved needle design to reduce the risk of infection in transrectal prostate biopsies
- 2022
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis addresses infections in prostate biopsy – a global problem. Over 3 million prostate biopsies are performed annually and 3% of men suffer a severe infection. The risk of infection is increasing in parallel with rising antibiotic resistance. By combining clinical knowledge with technical development, this thesis aims to address the risk of infection in a novel way – by redesigning the medical needle that causes the infections.
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| 3. |
- Forsvall, Andreas, et al.
(författare)
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Perigenital necrotizing soft tissue infection caused by Aerococcus urinae
- 2019
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Ingår i: IDCases. - : Elsevier BV. - 2214-2509. ; 18
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Tidskriftsartikel (refereegranskat)abstract
- Aerococcus urinae can cause severe invasive infections emanating from the urinary tract especially in older males with comorbidities. Here we describe a case of an 80 year-old man with multiple comorbidities presenting with a peri-penile abscess and signs of severe infection. Upon incision A. urinae was isolated in pure culture and the infection was cured by a combination of drainage and antimicrobials. This case demonstrates the potential of A. urinae to cause severe soft tissue infections in predisposed individuals.
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| 4. |
- Forsvall, Andreas, et al.
(författare)
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Prostate biopsy quality and patient experience with the novel Forsvall biopsy needle - a randomized controlled non-inferiority trial
- 2021
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Ingår i: Scandinavian Journal of Urology. - : Medical Journals Sweden AB. - 2168-1805 .- 2168-1813. ; 55:3, s. 235-241
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Tidskriftsartikel (refereegranskat)abstract
- Background Transrectal prostate biopsy (TRbx) carries an increasing risk of infection. The Forsvall Needle Prototype (FNP) is a novel biopsy needle that reduces bacterial load brought across the rectum and may therefore reduce infection risk. The objective of this study was to compare biopsy length, quality and patient experience for the FNP Version 2 (FNP2) versus a standard Tru-Cut needle. Methods We conducted a randomized, parallel-group, non-inferiority trial with twenty consecutive patients eligible for TRbx. Participants were randomized to undergo TRbx using either FNP2 or a standard Tru-Cut needle. The primary outcome was difference in mean biopsy lengths measured by the pathologist. FNP2 biopsy lengths <= 1.35 mm of the standard needle length were considered non-inferior. Secondary outcomes were biopsy length in the needle chamber and immediately after removal, biopsy quality, biopsy fragmentation, patient discomfort/pain, and complications (immediate and after 14 and 30 days). Results Mean pathologist-measured FNP2 biopsy length was non-inferior compared to the standard Tru-Cut needle (0.02 mm longer, 95%CI-0.73 to 0.76 mm). Biopsy length in the needle chamber and immediately after removal were also non-inferior. Biopsy quality and patient discomfort were not significantly different for the FNP2 and the standard Tru-Cut needle. Biopsy fragmentation was more common in the FNP2 group. Conclusions The FNP2 biopsy needle is non-inferior to the Tru-Cut needle in terms of biopsy length and not significantly different in terms of biopsy quality and patient experience. Future studies will evaluate the Forsvall needle design's effect on post-biopsy infection risk.
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| 5. |
- Forsvall, Andreas, et al.
(författare)
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Rate and characteristics of infection after transrectal prostate biopsy: a retrospective observational study
- 2021
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Ingår i: Scandinavian Journal of Urology. - : Medical Journals Sweden AB. - 2168-1805 .- 2168-1813. ; 55:4, s. 317-323
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Tidskriftsartikel (refereegranskat)abstract
- Objectives The aim of this study was to assess the incidence of infection after transrectal prostate biopsy (TRbx). Secondary objectives were to describe infection characteristics, antibiotic resistance patterns, ICD-10 coding, and costs. Methods TRbx carried out at the hospitals of angelholm and Helsingborg, Scania, Sweden, between October 2017 and March 2019, were identified based on the NOMESCO Classification of Surgical Procedures code for TRbx, TKE00. All patients received per oral antibiotic prophylaxis, usually 750 mg ciprofloxacin at biopsy. Other preventative measures were not used. Medical care within 30 days of the biopsy was evaluated through a manual retrospective medical chart review. Data on patient and infection characteristics were collected. The costs of infections causing hospitalization were estimated. Results After 36 (5.4%) of 670 biopsies, the patient developed post-biopsy infection within 30 days after TRbx. Twenty-six patients (3.9%) required hospitalization for an average of 6 days, at an estimated direct cost of USD 9174 (EUR 8031) per patient. Nine patients (1.3%) had a complicated infection leading to intensive care, multiple hospitalizations or emergency department visits. The inpatient care episodes for the 26 hospitalized patients were categorized with 15 different ICD-codes. In 6 episodes no ICD-code related to infection was used. Conclusions In this study, we found an infection rate of 5.4% after TRbx; 3.9% of the patients were hospitalized for a post-TRbx infection and 1.3% had complicated infections. A specific ICD code for post-TRbx infections would facilitate evaluation and monitoring of this common, costly, and sometimes serious complication.
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| 6. |
- Wagenius, Magnus, et al.
(författare)
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Factors influencing stone-free rate of Extracorporeal Shock Wave Lithotripsy (ESWL) : a cohort study
- 2022
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Ingår i: Scandinavian journal of urology. - : Taylor & Francis. - 2168-1805 .- 2168-1813. ; 56:3, s. 237-243
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Tidskriftsartikel (refereegranskat)abstract
- Objective: To evaluate the success rate of Extracorporeal Shock Wave Lithotripsy (ESWL) therapy and identify relevant treatment-specific factors affecting stone-free rate (SFR) after ESWL.Materials and methods: All ESWL treatments in the years 2016-2019, in angelholm Hospital, Skane, Sweden were analysed retrospectively. Primary outcome was stone-free rate (SFR) at 3 months. Univariate logistic regression was used followed by multivariable regression. Lasso analysis was made to adjust for treatment-specific factors such as age, stone size, skin-to-stone distance (SSD), stone attenuation, number of treatments, stone location and presence of a urinary stent.Results: Factors affecting successful ESWL treatment were lower age (p < 0.001), smaller stone size and volume (both p = 0.001). SSD, stone attenuation, sex, laterality and drainage did not have an effect on SFR in this study. After the first ESWL treatment session, 46.7% of the patients were stone-free.Conclusion: Results indicate that stone size and age are the most predictive factors for ESWL outcome. Based on this, we present a simple model for prediction of SFR after ESWL, to be used when counseling patients before ESWL treatment.
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| 7. |
- Wagenius, Magnus, et al.
(författare)
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Percutaneous nephrolithotomy and modern aspects of complications and antibiotic treatment
- 2020
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Ingår i: Scandinavian Journal of Urology. - : Medical Journals Sweden AB. - 2168-1805 .- 2168-1813. ; 54:2, s. 162-170
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Tidskriftsartikel (refereegranskat)abstract
- Objective: The incidence of urinary stones is increasing across the globe. Surgical treatment includes extracorporal shock-wave lithotripsy (ESWL), ureterolithotripsy (URS), percutaneous nephrolitotomy (PCNL) and rarely open surgery. This single center study describes complications to PCNL focusing on infections, bacterial growth/resistance and antibiotic prophylaxis/treatment. Materials and methods: All patients treated for kidney stones with PCNL at Ängelholm Hospital in north-western Scania, Sweden from January 2009 to December 2015 were included. A dipstick test and a bacterial culture was made on all patients. Kidney stones were analysed for composition and cultured for bacteria. Results: In total, 186 patients underwent PCNL, all receiving perioperative antibiotics. Thirty percent (56/186) had a positive urinary culture taken before surgery and 33.3% (62/186) had positive stone culture. The concordance between urinary and stone culture was 57.1%. Both positive stone and urinary culture increased the risk of complications after surgery (p = 0.002 and p = 0.017, respectively). Complications occurred in 16% (30/186). Eight patients (4.3%) developed sepsis. The most common bacteria in urine were Enterococcus faecalis and Escherichia coli, both 20%. The most common stone-bacteria reported was Enterococcus faecalis (26%). Conclusion: This study has a total complication rate of 16%, approximately 10% of those are severe. The most common complication to PCNL was infection (60%), followed by bleeding (5.4%), reoperation (1.6%) and pain (0.5%). The high prevalence of E. faecalis might need to be considered, however the results should be validated in a larger cohort, possibly with a higher rate of antibiotic resistance, before a change of guidelines regarding prophylactic antibiotics could be proposed.
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| 8. |
- Wagenius, Magnus, et al.
(författare)
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Ureteroscopy : A population based study of clinical complications and possible risk factors for stone surgery
- 2019
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Ingår i: Central European Journal of Urology. - : Polish Urological Association. - 2080-4806 .- 2080-4873. ; 72:3, s. 285-295
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Tidskriftsartikel (refereegranskat)abstract
- Introduction The aim of this study was to describe the complications of ureteroscopy (URS) and to investigate whether performing URS outside normal working hours leads to increased risk for clinically significant complications. Material and methods A cohort of 486 consecutive patients treated with URS, with a total of 567 sessions between 2009 and 2015 at Helsingborg/Ängelholm Hospital, Sweden, was analyzed. Outcome was complications within 14 days after URS treatment. Results We found no increased risk of complications related to URS performed outside normal working hours. Stone-free rate (SFR) in the distal third of the ureter was 95.2% (315/331), in the middle ureter 92.8% (90/97), in the proximal ureter 84.0% (63/75) and 69.0% (40/58) in renal pelvis. The overall complication rate was 10.6% (n = 60). None of the potential risk factors for complications showed any significance when adjusted for age and gender. We found an inverse relationship between stenting and SFR (p = 0.002). The most common preoperatively cultured bacteria was Escherichia coli. With adequate antibiotics, there was no increased risk of complications. There was an increased risk of complications after URS related to age, but not with gender. Conclusions URS in modern setting provides excellent results with adequate SFR and low morbidity. Time of day, the presence of urological specialized operating nurses did not affect the risk of complications and we found no other significant risk factors for complications. Escherichia coli was the most commonly found bacteria in preoperative cultures. The risk of complications increases with age. For patients >65 years old, this should be considered in preoperative counseling.
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