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A simple solution to deliver a second guidewire without a dual-lumen microcatheter-The sidecar technique.

ABSTRACT: The sidecar technique represents a simple and inexpensive solution to successfully deliver a second guidewire distally whenever a dual-lumen microcatheter is not available.

SUBMITTER: Leibundgut G

PROVIDER: S-EPMC8428808 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Parent Vessel Occlusion via the Balloon-Assisted, Dual Microcatheter Technique.

Project description:Endovascular parent vessel sacrifice is an established technique used to treat vascular pathology and tumor infiltration of blood vessels. In high-flow vessels, such as the carotid artery or vertebral artery, distal coil migration and embolization are concerns. A method to mitigate this risk would improve the safety profile of the procedure. Five patients undergoing parent vessel sacrifice were retrospectively identified (from June 2018 to May 2019) for the purpose of illustrating this high-flow parent vessel occlusion technique. The technique utilizes a proximal dual-lumen balloon microcatheter inflated for blood flow arrest. The balloon-assisted, dual microcatheter technique is useful for occlusion of high-flow parent arteries. Because it utilizes both flow arrest and a tethered coil backstop, precise occlusion of a vessel can be achieved.

| S-EPMC7591226 | biostudies-literature

Modified double-guidewire technique using a unique double-lumen sphincterotome for difficult biliary cannulation.

Project description: Not available

| S-EPMC7947635 | biostudies-literature

Use of a double-lumen cytology brush catheter to allow double-guidewire technique for endoscopic interventions.

Project description:Background and aimsSerial stent placement may be necessary during endoscopic interventions, but the passage of a guidewire alongside an initial stent can be challenging, time-consuming, and sometimes unsuccessful. We describe a modification of a cytology brush catheter to allow simultaneous placement of 2 guidewires to facilitate serial stent placement and demonstrate its application in different scenarios.MethodsThis is a retrospective series of 3 patients with different conditions (acute cholecystitis, pancreas pseudocyst, and severe biliary stricture) in whom placement of a second guidewire facilitated serial stent placement. A step-by-step demonstration of the technique is provided.ResultsSerial stent placement was successful in all patients without adverse events.ConclusionsA modified cytology brush catheter can be used to deliver 2 guidewires simultaneously during ERCP and EUS procedures. This technique may improve procedural efficiency, maintain a safety track, and augment therapy in certain situations.

| S-EPMC7731304 | biostudies-literature

Incidental Discovery of Retained Triple Lumen Catheter Guidewire.

Project description: Not available

| S-EPMC5330992 | biostudies-literature

Simple new technique for macular pucker peel without forceps.

Project description:PurposeThis study aimed to describe the effectiveness and evaluate the anatomical and functional results of surgery for macular pucker (MP) peel using a 25-gauge pars plana vitrectomy (PPV) cutter without forceps.MethodsThis study assessed a prospective consecutive case series of 14 eyes of 14 patients who underwent 25-gauge PPV for MP. The surgical procedure was performed using the new peeling technique. The edge of the membrane was engaged at the opening of the cutter by gradually increasing the vacuum. The peeling process was finished by holding a stable vacuum or regrasping the membrane in the same manner.ResultsThe study included six women and eight men patients with a mean age of 72.3 (range 59-84) years. MP peel was achieved in all cases without the need for microforceps. Patients were followed for at least 6 months. Visual acuity and retinal thickness were obtained 6 months after the surgery. Best corrected visual acuity improved from a mean pre-operative 0.6 on a logMAR scale to post-operative 0.23 (P < 0.001). Mean pre-operative Central Retinal Thickness was significantly reduced from 489.7 to 377.6 μm post-operatively (P < 0.001). There were no intra- or post-operative complications.ConclusionMP peel with a 25-gauge vitrectomy probe could be an alternative simple and safe technique. The technique does not require extra instrumentation. It results in anatomic and functional improvement in all cases.

| S-EPMC9513118 | biostudies-literature

A Simple and Effective Phosphine-Doping Technique for Solution-Processed Nanocrystal Solar Cells.

Project description:Solution-processed cadmium telluride (CdTe) nanocrystal (NC) solar cells offer the advantages of low cost, low consumption of materials and large-scale production via a roll-to-roll manufacture process. Undecorated CdTe NC solar cells, however, tend to show inferior performance due to the abundant crystal boundaries within the active CdTe NC layer. The introduction of hole transport layer (HTL) is effective for promoting the performance of CdTe NC solar cells. Although high-performance CdTe NC solar cells have been realized by adopting organic HTLs, the contact resistance between active layer and the electrode is still a large problem due to the parasitic resistance of HTLs. Here, we developed a simple phosphine-doping technique via a solution process under ambient conditions using triphenylphosphine (TPP) as a phosphine source. This doping technique effectively promoted the power conversion efficiency (PCE) of devices to 5.41% and enabled the device to have extraordinary stability, showing a superior performance compared with the control device. Characterizations suggested that the introduction of the phosphine dopant led to higher carrier concentration, hole mobility and a longer lifetime of the carriers. Our work presents a new and simple phosphine-doping strategy for further improving the performance of CdTe NC solar cells.

| S-EPMC10254249 | biostudies-literature

Surface Alloying in Silver-Cobalt through a Second Wave Solution Combustion Synthesis Technique.

Project description:Herein, we report the synthesis of silver-cobalt nanopowders using three different modes of solution combustion synthesis, and we present the effects of the synthesis conditions on particle morphology. The synthesized nanoparticles were characterized using X-ray diffraction (XRD), Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), UV-Visible spectrophotometer (UV-vis), Transmission electron microscopy (TEM), and X-Ray Photoelectron Spectroscopy (XPS) to understand the structural and elemental properties. When Co is synthesized over Ag in a second wave of combustion, peak shifts observed in XRD and XPS show a change in the cell parameters and prove the existence of a strong electronic interaction between Ag and Co. Better control of mixing and alloying through the second wave combustion synthesis mode (SWCS) was evident. The sequence of combustion affects the structure and composition of the material. SWCS reduces the amount of carbon content, as compared to single-stage combustion, and the combustion of carbon is followed by a rearrangement of atoms.

| S-EPMC6116214 | biostudies-literature

Cholangioscopy-guided double-guidewire technique for complex malignant hilar obstruction.

Project description:Video 1Cholangioscopy-guided double-guidewire technique for the management of complex malignant hilar obstruction.

| S-EPMC8755521 | biostudies-literature

Recanalization of chronic total occlusion using a new device: the real-time intravascular ultrasound double-lumen microcatheter.

Project description: Not available

| S-EPMC7909382 | biostudies-literature

Folded-Loop Guidewire Remodeling Technique: Catheterizing Markedly Angulated Branches during Intravascular Embolization Folded-Loop Guidewire Remodeling Technique: 색전술 시 급격한 분지 각도를 가지는 혈관의 선택적 진입 방법

Project description:Purpose Practical challenges are encountered in percutaneous intravascular procedures when applied to markedly angulated branching vessels. Herein, we introduced a folded-loop guidewire remodeling technique–the guidewire-shaping technique–to overcome difficult catheterization. Materials and Methods First, the tip of a 0.014-inch micro-guidewire was manually shaped like a pigtail loop. Second, the shaped guidewire was introduced into the microcatheter and was preloaded into the hollow metal introducer for suitability with the microcatheter hub. Gentle rotation of the guidewire after release from the microcatheter can create the preshaped pigtail loop configuration. On pulling back, the loop loosened, the configuration was changed to a small U-shaped tip, and the guidewire tip was easily introduced into the target artery. Results Between December 2019 and January 2022, the described technique was used in 64 patients (male/female, 49/15; mean age, 66.8 ± 9.5 years) for selective arterial embolization, after failed attempts with the conventional selection technique. The technique was successful in 63/64 patients (98%). The indications of embolization include transcatheter arterial chemoembolization, gastrointestinal bleeding, hemoptysis, trauma-induced bleeding, and tumor bleeding. Conclusion The folded-loop guidewire remodeling technique facilitates the catheterization of markedly angulated branching arteries; when usual catheterization method fails. Graphical Abstract

| S-EPMC10083636 | biostudies-literature

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