Letter to the Editor on “Prediction of Knee Kinematics at Time of Noncontact Anterior Cruciate Ligament Injuries Based on Bone Bruises”

Grassi, Alberto; Agostinone, Piero; Paolo, Stefano Di; Zaffagnini, Stefano

doi:10.1007/s10439-020-02574-1

Cited by 9 publications

(10 citation statements)

References 14 publications

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“…The experiments were performed without biological tissue in between the sensors and the NGT. This is because it was found that the tracking performance will not be affected by the biological tissue in the study we previously carried out [ 17 ]. The magnetic field generated by live humans ranges from 20 fT to 1 nT [ 37 ].…”

Section: Discussionmentioning

confidence: 99%

“…Although this work focuses on the application for NGT insertion, the proposed system could be applied for tracking the MIBC, endoscopic capsules, and other medical devices [ 38 , 39 , 40 ].…”

Section: Discussionmentioning

confidence: 99%

“…We have previously developed a passive magnet tracking method based on two magnetic sensors, for tracking the magnetically inflatable intragastric balloon capsule (MIBC) [ 17 ]. The system uses two three-axis magnetic sensors placed in front and back of the patient.…”

Section: Introductionmentioning

confidence: 99%

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A Low-Cost, Point-of-Care Test for Confirmation of Nasogastric Tube Placement via Magnetic Field Tracking

Miyasaka

Tay

et al. 2021

Sensors

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In this work, we aim to achieve low-cost real-time tracking for nasogastric tube (NGT) insertion by using a tracking method based on two magnetic sensors. Currently, some electromagnetic (EM) tracking systems used to detect the misinsertion of the NGT are commercially available. While the EM tracking systems can be advantageous over the other conventional methods to confirm the NGT position, their high costs are a factor hindering such systems from wider acceptance in the clinical community. In our approach, a pair of magnetic sensors are used to estimate the location of a permanent magnet embedded at the tip of the NGT. As the cost of the magnet and magnetic sensors is low, the total cost of the system can be less than one-tenth of that of the EM tracking systems. The experimental results exhibited that tracking can be achieved with a root mean square error (RMSE) of 2–5 mm and indicated a great potential for use as a point-of-care test for NGT insertion, to avoid misplacement into the lung and ensure correct placement in the stomach.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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A Low-Cost, Point-of-Care Test for Confirmation of Nasogastric Tube Placement via Magnetic Field Tracking

Miyasaka

Tay

et al. 2021

Sensors

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“…The more important reason is that in order to ensure that the vascular stent has sufficient radial stiffness to support the inner wall of the blood vessel, Young’s modulus and hardness of the selected stent material are higher than that of the vessel. Colombo et al elucidated the possible link between altered hemodynamics and ISR progression [ 15 ]. They found that focal re-narrowing frequently occurred after investigating from six months to 12 months.…”

Section: Introductionmentioning

confidence: 99%

Structural Design of Vascular Stents: A Review

Pan

Han

2021

Micromachines

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Percutaneous Coronary Intervention (PCI) is currently the most conventional and effective method for clinically treating cardiovascular diseases such as atherosclerosis. Stent implantation, as one of the ways of PCI in the treatment of coronary artery diseases, has become a hot spot in scientific research with more and more patients suffering from cardiovascular diseases. However, vascular stent implanted into vessels of patients often causes complications such as In-Stent Restenosis (ISR). The vascular stent is one of the sophisticated medical devices, a reasonable structure of stent can effectively reduce the complications. In this paper, we introduce the evolution, performance evaluation standards, delivery and deployment, and manufacturing methods of vascular stents. Based on a large number of literature pieces, this paper focuses on designing structures of vascular stents in terms of “bridge (or link)” type, representative volume unit (RVE)/representative unit cell (RUC), and patient-specific stent. Finally, this paper gives an outlook on the future development of designing vascular stents.

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“…Some natural materials that have been explored as bioactive scaffolds for cartilage engineering include chitosan, collagen, fibrin, alginate, and agarose [ 14 , 16 ]. Chitosan-based materials have been recognized as a suitable microenvironment for chondrocyte adhesion, proliferation, and differentiation when forming articular cartilage [ 17 ]. Chitosan has many attractive properties including biocompatibility, biodegradability, non-toxicity, remarkable affinity to proteins, bacterial resistance, and hemostaticity [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

PHB/CHIT Scaffold as a Promising Biopolymer in the Treatment of Osteochondral Defects—An Experimental Animal Study

Petrovová

Tomco²,

Holovská

et al. 2021

Polymers

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Biopolymer composites allow the creation of an optimal environment for the regeneration of chondral and osteochondral defects of articular cartilage, where natural regeneration potential is limited. In this experimental study, we used the sheep animal model for the creation of knee cartilage defects. In the medial part of the trochlea and on the medial condyle of the femur, we created artificial defects (6 × 3 mm2) with microfractures. In four experimental sheep, both defects were subsequently filled with the porous acellular polyhydroxybutyrate/chitosan (PHB/CHIT)-based implant. Two sheep had untreated defects. We evaluated the quality of the newly formed tissue in the femoral trochlea defect site using imaging (X-ray, Computer Tomography (CT), Magnetic Resonance Imaging (MRI)), macroscopic, and histological methods. Macroscopically, the surface of the treated regenerate corresponded to the niveau of the surrounding cartilage. X-ray examination 6 months after the implantation confirmed the restoration of the contour in the subchondral calcified layer and the advanced rate of bone tissue integration. The CT scan revealed a low regenerative potential in the bone zone of the defect compared to the cartilage zone. The percentage change in cartilage density at the defect site was not significantly different to the reference area (0.06–6.4%). MRI examination revealed that the healing osteochondral defect was comparable to the intact cartilage signal on the surface of the defect. Hyaline-like cartilage was observed in most of the treated animals, except for one, where the defect was repaired with fibrocartilage. Thus, the acellular, chitosan-based biomaterial is a promising biopolymer composite for the treatment of chondral and osteochondral defects of traumatic character. It has potential for further clinical testing in the orthopedic field, primarily with the combination of supporting factors.

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Letter to the Editor on “Prediction of Knee Kinematics at Time of Noncontact Anterior Cruciate Ligament Injuries Based on Bone Bruises”

Cited by 9 publications

References 14 publications

A Low-Cost, Point-of-Care Test for Confirmation of Nasogastric Tube Placement via Magnetic Field Tracking

A Low-Cost, Point-of-Care Test for Confirmation of Nasogastric Tube Placement via Magnetic Field Tracking

Structural Design of Vascular Stents: A Review

PHB/CHIT Scaffold as a Promising Biopolymer in the Treatment of Osteochondral Defects—An Experimental Animal Study

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