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Guillaume O, Pérez-Köhler B, Schädl B, Keibl C, Saxenhuber N, Heimel P, Priglinger E, Wolbank S, Redl H, Petter-Puchner A, Fortelny R. Stromal vascular fraction cells as biologic coating of mesh for hernia repair. Hernia 2020; 24:1233-1243. [PMID: 32096088 PMCID: PMC7701131 DOI: 10.1007/s10029-020-02135-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 01/29/2020] [Indexed: 12/19/2022]
Abstract
Background The interest in non-manipulated cells originating from adipose tissue has raised tremendously in the field of tissue engineering and regenerative medicine. The resulting stromal vascular fraction (SVF) cells have been successfully used in numerous clinical applications. The aim of this experimental work is, first to combine a macroporous synthetic mesh with SVF isolated using a mechanical disruption process, and to assess the effect of those cells on the early healing phase of hernia. Methods Human SVF cells combined with fibrin were used to coat commercial titanized polypropylene meshes. In vitro, viability and growth of the SVF cells were assessed using live/dead staining and scanning electron microscopy. The influence of SVF cells on abdominal wall hernia healing was conducted on immunodeficient rats, with a focus on short-term vascularization and fibrogenesis. Results Macroporous meshes were easily coated with SVF using a fibrin gel as temporary carrier. The in vitro experiments showed that the whole process including the isolation of human SVF cells and their coating on PP meshes did not impact on the SVF cells’ viability and on their capacity to attach and to proliferate. In vivo, the SVF cells were well tolerated by the animals, and coating mesh with SVF resulted in a decrease degree of vascularity compared to control group at day 21. Conclusions The utilization of SVF-coated mesh influences the level of angiogenesis during the early onset of tissue healing. Further long-term animal experiments are needed to confirm that this effect correlates with a more robust mesh integration compared to non-SVF-coated mesh.
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Affiliation(s)
- O Guillaume
- 3D Printing and Biofabrication Group, Institute of Materials Science and Technology, TU Wien, Vienna, Austria. .,Austrian Cluster for Tissue Regeneration, Vienna, Austria.
| | - B Pérez-Köhler
- Department of Medicine and Medical Specialties, University of Alcalá, Madrid, Spain.,Biomedical Networking Research Centre On Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain.,Ramón y Cajal Health Research Institute (IRYCIS), Madrid, Spain
| | - B Schädl
- Austrian Cluster for Tissue Regeneration, Vienna, Austria.,Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria.,University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - C Keibl
- Austrian Cluster for Tissue Regeneration, Vienna, Austria.,Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria
| | - N Saxenhuber
- Austrian Cluster for Tissue Regeneration, Vienna, Austria.,Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria
| | - P Heimel
- Austrian Cluster for Tissue Regeneration, Vienna, Austria.,Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria.,University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - E Priglinger
- Austrian Cluster for Tissue Regeneration, Vienna, Austria.,Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria
| | - S Wolbank
- Austrian Cluster for Tissue Regeneration, Vienna, Austria.,Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria
| | - H Redl
- Austrian Cluster for Tissue Regeneration, Vienna, Austria.,Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria
| | - A Petter-Puchner
- Austrian Cluster for Tissue Regeneration, Vienna, Austria.,Department of General, Visceral and Oncologic Surgery, Wilhelminenspital, Vienna, Austria
| | - R Fortelny
- Austrian Cluster for Tissue Regeneration, Vienna, Austria.,Department of General, Visceral and Oncologic Surgery, Wilhelminenspital, Vienna, Austria
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Azimov RK, Al-Ariki M, Akhmedov TZ, Tarxani M. [Titanium mesh implants in herniology]. Khirurgiia (Mosk) 2019:126-131. [PMID: 31825353 DOI: 10.17116/hirurgia2019121126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Literature review is devoted to the main implants used in hernia surgery and their disadvantages. Advisability of titanium mesh implants in surgery of anterior abdominal wall hernias is shown.
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Affiliation(s)
- R Kh Azimov
- The Department of hospital surgery with the course of pediatric surgery of the RUDN University, Moscow, Russia
| | - M Al-Ariki
- Central Clinical Hospital of the Russian Academy of Sciences, Moscow, Russia
| | - T Z Akhmedov
- Central Clinical Hospital of the Russian Academy of Sciences, Moscow, Russia
| | - M Tarxani
- Central Clinical Hospital of the Russian Academy of Sciences, Moscow, Russia
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Rohrbach D, Mamou J. Autoregressive Signal Processing Applied to High-Frequency Acoustic Microscopy of Soft Tissues. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2018; 65:2054-2072. [PMID: 30222559 DOI: 10.1109/tuffc.2018.2869876] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Quantitative acoustic microscopy (QAM) at frequencies exceeding 100 MHz has become an established imaging tool to depict acoustical and mechanical properties of soft biological tissues at microscopic resolutions. In this study, we investigate a novel autoregressive (AR) model to improve signal processing and parameter estimation and to test its applicability to QAM. The performance of the AR model for estimating acoustical parameters of soft tissues (i.e., acoustic impedance, speed of sound, and attenuation) was compared to the performance of the Hozumi model using simulated ultrasonic QAM signals and using experimentally measured signals from thin (i.e., 12 and ) sections of human lymph-node and pig-cornea tissue specimens. Results showed that the AR and Hozumi methods performed equally well (i.e., produced an estimation error of 0) in signals with low, linear attenuation in the tissue and high impedance contrast between the tissue and the coupling medium. However, the AR model outperformed the Hozumi model in estimation accuracy and stability (i.e., parameter error variation and number of outliers) in cases of 1) thin tissue-sample thickness and high tissue-sample speed of sound, 2) small impedance contrast between the tissue sample and the coupling medium, 3) high attenuation in the tissue sample, and 4) nonlinear attenuation in the tissue sample. Furthermore, the AR model allows estimating the exponent of nonlinear attenuation. The results of this study suggest that the AR model approach can improve current QAM by providing more reliable, quantitative, tissue-property estimates and also provides additional values of parameters related to nonlinear attenuation.
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Rohrbach D, Ito K, Lloyd HO, Silverman RH, Yoshida K, Yamaguchi T, Mamou J. Material Properties of Human Ocular Tissue at 7-µm Resolution. ULTRASONIC IMAGING 2017; 39:313-325. [PMID: 28675987 PMCID: PMC7536713 DOI: 10.1177/0161734617713498] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Quantitative assessment of the material properties of ocular tissues can provide valuable information for investigating several ophthalmic diseases. Quantitative acoustic microscopy (QAM) offers a means of obtaining such information, but few QAM investigations have been conducted on human ocular tissue. We imaged the optic nerve (ON) and iridocorneal angle in 12-µm deparaffinized sections of the human eye using a custom-built acoustic microscope with a 250-MHz transducer (7-µm lateral resolution). The two-dimensional QAM maps of ultrasound attenuation (α), speed of sound ( c), acoustic impedance ( Z), bulk modulus ( K), and mass density (ρ) were generated. Scanned samples were then stained and imaged by light microscopy for comparison with QAM maps. The spatial resolution and contrast of scanning acoustic microscopy (SAM) maps were sufficient to resolve anatomic layers of the retina (Re); anatomic features in SAM maps corresponded to those seen by light microscopy. Significant variations of the acoustic parameters were found. For example, the sclera was 220 MPa stiffer than Re, choroid, and ON tissue. To the authors' knowledge, this is the first systematic study to assess c, Z, K, ρ, and α of human ocular tissue at the high ultrasound frequencies used in this study.
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Kazantsev AA, Parshikov VV, Shemyatovsky KA, Alekhin AI, Titarov DL, Kolpakov AA, Osadchenko SV. [The titanium-containing mesh as a perspective group of implants for abdominal wall repair]. Khirurgiia (Mosk) 2016. [PMID: 28635687 DOI: 10.17116/hirurgia2016486-95] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- A A Kazantsev
- Central Clinical Hospital of the Russian Academy of Sciences, Moscow
| | - V V Parshikov
- Chair of Hospital Surgery of Nizhny Novgorod State Medical Academy, Nizhny Novgorod
| | - K A Shemyatovsky
- Chair of Operative Surgery of Nizhny Novgorod State Medical Academy, Nizhny Novgorod
| | - A I Alekhin
- Central Clinical Hospital of the Russian Academy of Sciences, Moscow
| | - D L Titarov
- Chair of Operative Surgery of Nizhny Novgorod State Medical Academy, Nizhny Novgorod
| | | | - S V Osadchenko
- D.I. Mendeleev Russian Chemical-Technological University, Moscow
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Martins NSDF, Carneiro LT, Dantas HDM, Esperança C, Marroquim RG, Oliveira LFD, Machado JC. Generation of 3D ultrasound biomicroscopic images: technique validation and in vivo volumetric imaging of rat lateral gastrocnemius. ACTA ACUST UNITED AC 2015. [DOI: 10.1590/1517-3151.0209] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
| | | | | | | | | | | | - João Carlos Machado
- Universidade Federal do Rio de Janeiro, Brasil; Universidade Federal do Rio de Janeiro, Brasil
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