Silicone Catheters May Be Superior to Latex Catheters in Difficult Urethral Catheterization After Urethral Dilation

Villanueva, Carlos; Hossain, Shakhawat; Nelson, Carl A.

doi:10.1089/end.2010.0591

Cited by 8 publications

(6 citation statements)

References 6 publications

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“…Based on tensile strength of commercial Foley catheter brands (6–8 MPa), the 3D-printed silicone prints evaluated in this study demonstrated similar strength (7.28 MPa) (Figure C). A comparable tensile strength of 6.29 MPa has been reported for 12 Fr silicone urinary catheters currently in use in patients . Although L.…”

Section: Discussionsupporting

confidence: 68%

“…A comparable tensile strength of 6.29 MPa has been reported for 12 Fr silicone urinary catheters currently in use in patients. 53 Although L. rhamnosus-containing material exhibited lower strength (2.2 MPa), this value was in the range of aged Foley catheters (2−5 MPa). 52 The value was also similar to the tensile strength of 2.7 MPa for 12 Fr latex urinary catheters used in patients.…”

Section: Discussionmentioning

confidence: 82%

“…rhamnosus-containing material exhibited lower strength (2.2 MPa), this value was in the range of aged Foley catheters (2–5 MPa) . The value was also similar to the tensile strength of 2.7 MPa for 12 Fr latex urinary catheters used in patients . Furthermore, the L.…”

Section: Discussionmentioning

confidence: 95%

“…52 The value was also similar to the tensile strength of 2.7 MPa for 12 Fr latex urinary catheters used in patients. 53 Furthermore, the L. rhamnosuscontaining biomaterial had a greater tensile strength than the ∼0.5 MPa recently reported for an antimicrobial PDMS-based biomaterial for urinary catheter fabrication. 54 Depending on future in vivo evaluation, composite fillers could be investigated to enhance the tensile strength of the biomaterial.…”

Section: Discussionmentioning

confidence: 99%

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Development and Characterization of Lactobacillus rhamnosus-Containing Bioprints for Application to Catheter-Associated Urinary Tract Infections

Kyser,

Mahmoud,

Johnson

et al. 2023

ACS Biomater. Sci. Eng.

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Catheter-associated urinary tract infections (CAUTI) are a significant healthcare burden affecting millions of patients annually. CAUTI are characterized by infection of the bladder and pathogen colonization of the catheter surface, making them especially difficult to treat. Various catheter modifications have been employed to reduce pathogen colonization, including infusion of antibiotics and antimicrobial compounds, altering the surface architecture of the catheter, or coating it with nonpathogenic bacteria. Lactobacilli probiotics offer promise for a “bacterial interference” approach because they not only compete for adhesion to the catheter surface but also produce and secrete antimicrobial compounds effective against uropathogens. Three-dimensional (3D) bioprinting has enabled fabrication of well-defined, cell-laden architectures with tailored release of active agents, thereby offering a novel means for sustained probiotic delivery. Silicone has shown to be a promising biomaterial for catheter applications due to mechanical strength, biocompatibility, and its ability to mitigate encrustation on the catheter. Additionally, silicone, as a bioink, provides an optimum matrix for bioprinting lactobacilli. This study formulates and characterizes novel 3D-bioprinted Lactobacillus rhamnosus (L. rhamnosus)-containing silicone scaffolds for future urinary tract catheterization applications. Weight-to-weight (w/w) ratio of silicone/L. rhamnosus was bioprinted and cured with relative catheter dimensions in diameter. Scaffolds were analyzed in vitro for mechanical integrity, recovery of L. rhamnosus, antimicrobial production, and antibacterial effect against uropathogenic Escherichia coli, the leading cause of CAUTI. The results show that L. rhamnosus-containing scaffolds are capable of sustained recovery of live bacteria over 14 days, with sustained production of lactic acid and hydrogen peroxide. Through the use of 3D bioprinting, this study presents a potential alternative strategy to incorporate probiotics into urinary catheters, with the ultimate goal of preventing and treating CAUTI.

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Section: Discussionsupporting

confidence: 68%

Section: Discussionmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

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Development and Characterization of Lactobacillus rhamnosus-Containing Bioprints for Application to Catheter-Associated Urinary Tract Infections

Kyser,

Mahmoud,

Johnson

et al. 2023

ACS Biomater. Sci. Eng.

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“…described the superior stiffness of silicone catheters in the setting of urethral dilation. 11 This propensity not to kink makes them easier to insert. Nacey et al .…”

Section: Discussionmentioning

confidence: 99%

A review of techniques for difficult catheterisation and their costs

Healy

Dyer

2021

Journal of Clinical Urology

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Objective: Awareness of departmental expenditure gives surgeons the ability to make cost-effective decisions. We reviewed the available techniques for difficult catheterisation and assessed the cost of each method. Methods: A literature search was undertaken using EMBASE and Medline databases. Seven techniques for difficult catheterisation were identified, and a cost analysis was performed. All items required for a technique were costed per unit, including VAT, and can be referenced to the NHS supply chain. Results: Techniques were divided into three broad categories: simple urethral techniques – increased lubrication with different catheter sizes (£5.05) or types (£8.83 Tiemann tip, £10.65 Coude tip); complex urethral techniques – blind hydrophilic guidewire (£27.31), S-dilators (£244.62) and flexible cystoscopy (£38.78); and percutaneous techniques – suprapubic catheterisation (£117.38). Conclusion: This paper demonstrates a progression in cost and specialist input required when moving from simple urethral techniques to complex and percutaneous techniques. It is clear that clinicians should consider these cost implications and exhaust all simple techniques before moving to the more complex options. We would advocate the use of a national evidence-based difficult catheter algorithm to guide management based on both effectiveness and cost. Level of evidence: Not applicable.

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Soft Robotic Concepts in Catheter Design: an On‐Demand Fouling‐Release Urinary Catheter

Levering

Wang

Shivapooja

et al. 2014

Adv Healthcare Materials

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Infectious biofilms are problematic in many healthcare-related devices, and are especially challenging and ubiquitous in urinary catheters. This report presents an on-demand fouling-release methodology to mechanically disrupt and remove biofilms, and proposes this method for the active removal of infectious biofilms from the previously-inaccessible main drainage lumen of urinary catheters. Mature Proteus mirabilis crystalline biofilms detach from silicone elastomer substrates upon application of strain to the substrate, and increasing the strain rate increases biofilm detachment. The study presents a quantitative relationship between applied strain rate and biofilm debonding through an analysis of biofilm segment length and the driving force for debonding. Based on this mechanism, hydraulic and pneumatic elastomer actuation was used to achieve surface strain selectively within the lumen of prototypes of sections of a fouling-release urinary catheter. Proof-of-concept prototypes of sections of active, fouling-release catheters were constructed using techniques typical to soft robotics including 3D printing and replica molding, and those prototypes demonstrate release of mature P. mirabilis crystalline biofilms (e.g., ≈90%) from strained surfaces. These results provide a basis for the development of a new urinary catheter technology in which infectious biofilms are effectively managed through new methods that are entirely complementary to existing approaches.

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Silicone Catheters May Be Superior to Latex Catheters in Difficult Urethral Catheterization After Urethral Dilation

Abstract: In the setting of the difficult urethral catheterization, silicone catheters should be used after urethral dilation, advanced through a Glidewire, because they offer more resistance to buckling and might necessitate less dilation than conventional latex catheters.

Cited by 8 publications

References 6 publications

Development and Characterization of Lactobacillus rhamnosus-Containing Bioprints for Application to Catheter-Associated Urinary Tract Infections

Development and Characterization of Lactobacillus rhamnosus-Containing Bioprints for Application to Catheter-Associated Urinary Tract Infections

A review of techniques for difficult catheterisation and their costs

Soft Robotic Concepts in Catheter Design: an On‐Demand Fouling‐Release Urinary Catheter

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