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Naser MA, Sayed AM, Abdelmoez W, El-Wakad MT, Abdo MS. Biodegradable suture development-based albumin composites for tissue engineering applications. Sci Rep 2024; 14:7912. [PMID: 38575715 PMCID: PMC10995150 DOI: 10.1038/s41598-024-58194-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 03/26/2024] [Indexed: 04/06/2024] Open
Abstract
Recent advancements in the field of biomedical engineering have underscored the pivotal role of biodegradable materials in addressing the challenges associated with tissue regeneration therapies. The spectrum of biodegradable materials presently encompasses ceramics, polymers, metals, and composites, each offering distinct advantages for the replacement or repair of compromised human tissues. Despite their utility, these biomaterials are not devoid of limitations, with issues such as suboptimal tissue integration, potential cytotoxicity, and mechanical mismatch (stress shielding) emerging as significant concerns. To mitigate these drawbacks, our research collective has embarked on the development of protein-based composite materials, showcasing enhanced biodegradability and biocompatibility. This study is dedicated to the elaboration and characterization of an innovative suture fabricated from human serum albumin through an extrusion methodology. Employing a suite of analytical techniques-namely tensile testing, scanning electron microscopy (SEM), and thermal gravimetric analysis (TGA)-we endeavored to elucidate the physicochemical attributes of the engineered suture. Additionally, the investigation extends to assessing the influence of integrating biodegradable organic modifiers on the suture's mechanical performance. Preliminary tensile testing has delineated the mechanical profile of the Filament Suture (FS), delineating tensile strengths spanning 1.3 to 9.616 MPa and elongation at break percentages ranging from 11.5 to 146.64%. These findings illuminate the mechanical versatility of the suture, hinting at its applicability across a broad spectrum of medical interventions. Subsequent analyses via SEM and TGA are anticipated to further delineate the suture's morphological features and thermal resilience, thereby enriching our comprehension of its overall performance characteristics. Moreover, the investigation delves into the ramifications of incorporating biodegradable organic constituents on the suture's mechanical integrity. Collectively, the study not only sheds light on the mechanical and thermal dynamics of a novel suture material derived from human serum albumin but also explores the prospective enhancements afforded by the amalgamation of biodegradable organic compounds, thereby broadening the horizon for future biomedical applications.
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Affiliation(s)
- Mohamed A Naser
- Faculty of Engineering, Biomedical Engineering Department, Minia University, Minia, Egypt.
- Faculty of Engineering, Biomedical Engineering Department, Helwan University, Helwan, Egypt.
| | - Ahmed M Sayed
- Faculty of Engineering, Biomedical Engineering Department, Helwan University, Helwan, Egypt.
- EECS Department, MSOE University, Milwaukee, United States.
| | - Wael Abdelmoez
- Faculty of Engineering, Chemical Engineering Department, Minia University, Minia, Egypt
| | - Mohamed Tarek El-Wakad
- Faculty of Engineering and Technology, Future University Egypt, Fifth Settlement, Cairo, Egypt
| | - Mohamed S Abdo
- Faculty of Engineering, Biomedical Engineering Department, Minia University, Minia, Egypt
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2
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Bonomelli N, Höglund OV, Bonilla AG. Laparoscopic cryptorchidectomy using a resorbable self-locking loop device in dorsally recumbent horses. Vet Surg 2024; 53:357-366. [PMID: 37463876 DOI: 10.1111/vsu.14001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 06/08/2023] [Accepted: 07/05/2023] [Indexed: 07/20/2023]
Abstract
OBJECTIVE To report the use and feasibility of a self-locking resorbable loop device for cryptorchidectomy. STUDY DESIGN Clinical prospective study. POPULATION Twenty horses. METHODS Horses suspected to have an abdominal testicle/s after admission work-up were enrolled. Horses were anesthetized in dorsal recumbency and a standard laparoscopic technique was performed. The looped device was inserted into the abdomen, glided around the testis/cord and tightened. Then, the spermatic cord was transected prior testis removal. Surgical procedure details and remarks, perioperative complications and total surgical time were recorded. Short- (>3 weeks) and long-term (>6 months) follow-ups were obtained by telephone questionnaire. RESULTS Median total surgical time was 67 min (range: 43-189 min) and significantly shortened after the first four horses. The loop device was easily glided around 13/20 abdominal testes and required more time and technical skills around larger testes (≥3 years). Excellent intraoperative hemostasis was achieved in 17 horses. Three horses demonstrated mild intraoperative bleeding that required retightening, device replacement or adding a second device, respectively. Three horses developed mild postoperative hemoabdomen identified ultrasonographically and were successfully managed medically. Follow-up revealed no significant complications related to the procedure. One horse was euthanized for colic 4 months after surgery and one died of hemolytic shock 17 months postoperatively. CONCLUSION This device represents another method to perform equine cryptorchidectomy that requires minimal training and laparoscopic expertise but demands knowledge of the device and application to prevent complications. CLINICAL SIGNIFICANCE Laparoscopic cryptorchidectomy using this device is an alternative technique for horses <3 years.
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Affiliation(s)
- Natacha Bonomelli
- Department of Clinical Sciences, College of Veterinary Medicine, University of Montreal, Saint Hyacinthe, Quebec, Canada
| | - Odd Viking Höglund
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
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3
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Hurcombe SD, Roessner HA, Klein CE, Engiles JB, Hopster K. Use of Polyamide (Nylon) Cable Ties for Vascular Ligation of Healthy Equine Jejunal Mesentery. Front Vet Sci 2021; 8:639424. [PMID: 34458347 PMCID: PMC8387623 DOI: 10.3389/fvets.2021.639424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 07/20/2021] [Indexed: 11/24/2022] Open
Abstract
Jejunal vascular ligation is an essential step in performing jejunojejunostomy. Hand sewn ligation is typically used and can increase operative time with long sections of bowel to be removed. Nylon cable ties (NCT) have been used for vascular ligation in horses but are yet to be investigated for application on the mesenteric vasculature of the gastrointestinal tract. Our objective was to evaluate the efficacy and short-term safety of NCT jejunal mesenteric vessel ligation in healthy horses. Eight healthy adult horses underwent midline celiotomy. A segment of jejunal mesentery was identified (≥4 arcades). Briefly, three fenestrations (proximal, middle, distal) were made 5–10 mm apart adjacent to the first and last vascular arcade to be ligated. Two sterilized NCT were passed to encircle the mesentery through the proximal and middle fenestrations, separated by intact mesentery. NCT were closed tightly and the vascular pedicle transected with Mayo scissors through the distal fenestration. Jejunojejunostomy was then performed and the mesentery sutured closed. The number of vascular arcades and time to ligate using NCT were recorded. At 2 weeks, horses underwent repeat celiotomy to assess the healing of the NCT ligation site and an equal number of vascular arcades were hand sewn double ligated using 2-0 Polyglactin 910 as a timed comparison. NCT mesenteric ligation was significantly faster than hand sewn methods (P < 0.01). Effective hemostasis was achieved in all cases. There was no evidence of local infection or adhesions at 14 days post-operatively. Further investigation in the long-term effects in horses as well as horses with strangulating jejunal lesions are needed for clinical application.
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Affiliation(s)
- Samuel D Hurcombe
- Department of Clinical Sciences, School of Veterinary Medicine, New Bolton Center, University of Pennsylvania, Kennett Square, PA, United States
| | - Holly A Roessner
- Department of Clinical Sciences, School of Veterinary Medicine, New Bolton Center, University of Pennsylvania, Kennett Square, PA, United States
| | - Chelsea E Klein
- Department of Clinical Sciences, School of Veterinary Medicine, New Bolton Center, University of Pennsylvania, Kennett Square, PA, United States
| | - Julie B Engiles
- Department of Clinical Sciences, School of Veterinary Medicine, New Bolton Center, University of Pennsylvania, Kennett Square, PA, United States.,Department of Pathobiology, School of Veterinary Medicine, New Bolton Center, University of Pennsylvania, Kennett Square, PA, United States
| | - Klaus Hopster
- Department of Clinical Sciences, School of Veterinary Medicine, New Bolton Center, University of Pennsylvania, Kennett Square, PA, United States
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4
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Adolfsson KH, Sjöberg I, Höglund OV, Wattle O, Hakkarainen M. In Vivo Versus In Vitro Degradation of a 3D Printed Resorbable Device for Ligation of Vascular Tissue in Horses. Macromol Biosci 2021; 21:e2100164. [PMID: 34339098 DOI: 10.1002/mabi.202100164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 06/14/2021] [Indexed: 11/09/2022]
Abstract
A resorbable 3D printed polydioxanone (PDO) device is manufactured to facilitate ligation of vascular tissue during surgery. The device must provide sufficient mechanical performance throughout the healing period. Therefore, degradation and mechanical performance of the device are investigated as a function of in vivo and in vitro aging. During aging the PDO device released cyclic and linear water-soluble products. In vivo aging resulted in higher relative number of linear oligomers in comparison to in vitro aging. A major loss of mechanical performance is observed after only 10 days in vivo and the Young's modulus (E) and tensile strength at break (σb ) decreased by 28% and 54%, respectively. This is in contrast to in vitro aging, where no loss of mechanical properties is observed during the same period. The in vivo aged devices exhibit clear holes in the matrices after 28 days, while apparent cracks are observed first after 140 days in vitro. These results highlight the sensitivity of the degradation process of resorbable devices with regards to the interactions of the device with the surrounding environment (tissues) and demonstrate the importance of in vivo testing as compliment to in vitro testing before clinical use of devices.
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Affiliation(s)
- Karin H Adolfsson
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, 100 44, Sweden
| | - Ida Sjöberg
- Department of Clinical Sciences, SLU Swedish University of Agricultural Sciences, Uppsala, Box 7054, 750 07, Sweden
| | - Odd V Höglund
- Department of Clinical Sciences, SLU Swedish University of Agricultural Sciences, Uppsala, Box 7054, 750 07, Sweden
| | - Ove Wattle
- Department of Clinical Sciences, SLU Swedish University of Agricultural Sciences, Uppsala, Box 7054, 750 07, Sweden
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, 100 44, Sweden
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5
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da Mota Costa MR, de Abreu Oliveira AL, de Moura Vidal LW, Moran Ramos R, de Oliveira Campos I, Hansson K, Ley CJ, Olsson U, Borg NO, Höglund OV. Comparison of macroscopic resorption time for a self-locking device and suture material in ovarian pedicle ligation in dogs. Vet Rec 2019; 184:478. [PMID: 30872363 DOI: 10.1136/vr.104732] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 10/19/2018] [Accepted: 02/07/2019] [Indexed: 11/03/2022]
Abstract
A resorbable self-locking device (LigaTie) was developed to enable safe and easy surgical ligation of blood vessels. The aim of this study was to compare the long-term in vivo resorption of the device to a commercially available suture of equivalent material (Maxon) following ovarian pedicle ligation. After ovariohysterectomy follow-up ultrasound examinations were performed monthly on 21 dogs ligated with the device and 22 dogs ligated with the suture material until no hyperechoic remnants, acoustic shadowing or local tissue reactions were detected. In both groups, the ovarian pedicles gradually decreased in size. Ligation material was considered macroscopically resorbed when ultrasound showed no signs of the device or suture, ovarian pedicle or tissue reaction. Macroscopic resorption had occurred without signs of complications and was complete by four months for sutures and 5.5 months for the device. The results show that resorption time in vivo for the resorbable self-locking device is mildly longer than suture of the same material and that no complications of device resorption were detected, supporting that the resorbable self-locking device is safe for in vivo use.
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Affiliation(s)
| | | | | | - Renato Moran Ramos
- Department of Animal Clinical and Surgery, Universidade Estadual Norte Fluminense, Alberto, Brazil
| | | | - Kerstin Hansson
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Charles J Ley
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Ulf Olsson
- Department of Energy and Technology, Swedish University of Agricultural Sciences, Applied statistics and mathematics, Uppsala, Sweden
| | | | - Odd Viking Höglund
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden.,Resorbable Devices AB, Uppsala, Sweden
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6
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Nylund AM, Chen C, Höglund OV, Campbell BG, Fransson BA. Evaluation of a resorbable self‐locking ligation device for performing peripheral lung biopsies in a caprine cadaveric model. Vet Surg 2019; 48:845-849. [DOI: 10.1111/vsu.13171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 04/08/2018] [Accepted: 04/09/2018] [Indexed: 11/26/2022]
Affiliation(s)
- Adam M. Nylund
- College of Veterinary MedicineWashington State University Pullman Washington
| | - Chi‐Ya Chen
- College of Veterinary MedicineWashington State University Pullman Washington
| | - Odd V. Höglund
- Department of Clinical SciencesSwedish University of Agricultural Sciences Uppsala Sweden
| | - Bonnie G. Campbell
- College of Veterinary MedicineWashington State University Pullman Washington
| | - Boel A. Fransson
- College of Veterinary MedicineWashington State University Pullman Washington
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7
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Nylund AM, Höglund OV, Fransson BA. Thoracoscopic‐assisted lung lobectomy in cat cadavers using a resorbable self‐locking ligation device. Vet Surg 2018; 48:563-569. [DOI: 10.1111/vsu.13109] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 07/23/2018] [Accepted: 09/04/2018] [Indexed: 11/30/2022]
Affiliation(s)
- Adam M. Nylund
- College of Veterinary MedicineWashington State University Pullman Washington
| | - Odd V. Höglund
- Department of Clinical SciencesSwedish University of Agricultural Sciences Uppsala Sweden
| | - Boel A. Fransson
- College of Veterinary MedicineWashington State University Pullman Washington
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8
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Ahrari Khafi MS, Mogheiseh A, Salavati S, Karimi S. Angiography of ovarian and uterine vessels of the dog. Anim Reprod Sci 2018; 195:329-333. [DOI: 10.1016/j.anireprosci.2018.06.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 06/22/2018] [Accepted: 06/24/2018] [Indexed: 11/26/2022]
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Sundholm Tepper AJ, Höglund OV, Campbell BG, Chen CY, Fransson BA. Cystic duct pressures after ligation with a novel absorbable device in an ex vivo caprine cholecystectomy model. CANADIAN JOURNAL OF VETERINARY RESEARCH = REVUE CANADIENNE DE RECHERCHE VETERINAIRE 2017; 81:223-227. [PMID: 28725113 PMCID: PMC5508381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 02/06/2017] [Indexed: 06/07/2023]
Abstract
Laparoscopic cholecystectomy is the standard of care in human medicine for gall bladder disease. Although infrequently reported in veterinary literature, laparoscopic cholecystectomy is an option for uncomplicated gall bladder disease in canine patients. Due to the risk of cystic duct ligature slippage or clip dislodgement, we wanted to explore the use of a LigaTie; a novel absorbable medical device modeled after a cable tie. Our object was to describe the use of the LigaTie in a caprine cadaveric study of cholecystectomies as a model for canine patients and demonstrate the leak pressure of the cystic duct compared with cholecystectomies performed with 2 large endoscopic hemoclips. Samples of caprine gall bladder, liver, and cystic duct were collected. The cystic duct was ligated with either 2 large endoscopic hemoclips or a LigaTie. Maximum cystic duct pressure was recorded. Results showed that there was no statistically significant difference in the maximum cystic duct pressure achieved for cystic ducts ligated with 2 large endoscopic hemoclips or the LigaTie (P = 0.865). No leakage was observed from the cystic duct, hemoclip, or LigaTie site in either group. Supraphysiologic pressures were achieved in both groups and high pressure occlusion of the infusion pump determined the maximum intraluminal pressure achieved. Based on these results, the LigaTie may provide advantages in minimally invasive surgery, especially when considering ligation of a friable or thickened cystic duct during laparoscopic cholecystectomy. Future in vivo studies are warranted to determine minimally invasive maneuverability, tissue interaction, complications, and outcomes.
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Affiliation(s)
| | | | | | | | - Boel A. Fransson
- Address all correspondence to Dr. Boel A. Fransson; telephone: (509) 335-5669; e-mail:
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10
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Costa MRDM, Oliveira ALDA, Ramos RM, Vidal LWDM, Borg N, Höglund OV. Ligation of the mesovarium in dogs with a self-locking implant of a resorbable polyglycolic based co-polymer: a study of feasibility and comparison to suture ligation. BMC Res Notes 2016; 9:245. [PMID: 27121033 PMCID: PMC4848858 DOI: 10.1186/s13104-016-2042-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 04/14/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Ligation of the mesovarium in female dogs may be cumbersome with risk of complications and is associated with intense noxious stimuli. A resorbable implant, a self-locking loop designed for surgery, was developed as an alternative to traditional ligation. The study aimed to test the feasibility of ligating the canine ovarian pedicle with the implant and to compare its performance to traditional suture ligation. RESULTS In total 45 intact female dogs destined for elective ovariohysterectomy and adoption were included. In 21 dogs the new resorbable implant was used to ligate the mesovarium, and in 24 control dogs traditional suture was used with one encircling ligature. Mean weight of implant dogs was 10.7 ± 5.6 kg (range 3.5-22.0), and mean weight of control dogs was 12.8 ± 6.4 kg, (range 4.1-27.0). The body weight of dogs did not differ between groups (P = 0.25). In total, 42 ovarian pedicles were successfully ligated with the implant. In one control dog, intraoperative haemorrhage from the left ovarian pedicle was diagnosed. The mesovarium was re-ligated and haemostasis was confirmed. All dogs recovered uneventfully. The ligation time of the mesovarium was significantly shortened (P = 0.02) by using the self-locking implant versus a single ligature (3'28'' ± 1'05'' and 5'29'' ± 3'54'', respectively). Total duration of surgery differed between the groups (P = 0.02) with a shortened duration of surgery when using the self-locking implant (15'56'' ± 2'47'' and 20'39'' ± 8'58'', study group versus control group, respectively). In both groups, duration of surgery and time required to ligate the ovarian pedicle were longer in larger dogs than smaller dogs. CONCLUSION The results of this feasibility study suggested the implant can be used to ligate the canine mesovarium. Compared with traditional suture ligation, the results suggested that time to ligate the ovarian pedicle and duration of surgery were significantly reduced with the implant. More time was required to perform surgeries in larger dogs.
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Affiliation(s)
- Matheus Roberto da Mota Costa
- Department of Animal Clinical and Surgery, Universidade Estadual Norte Fluminense, UENF/RJ, Av. Alberto Lamego, 2000, Campos dos Goytacazes, RJ, Brazil
| | - André Lacerda de Abreu Oliveira
- Department of Animal Clinical and Surgery, Universidade Estadual Norte Fluminense, UENF/RJ, Av. Alberto Lamego, 2000, Campos dos Goytacazes, RJ, Brazil
| | - Renato Moran Ramos
- Department of Veterinary Surgery and Anaesthesia, Universidade Iguaçu, UNIG/RJ, BR-356/KM 02, Itaperuna, RJ, Brazil
| | - Leonardo Waldstein de Moura Vidal
- Department of Animal Clinical and Surgery, Universidade Estadual Norte Fluminense, UENF/RJ, Av. Alberto Lamego, 2000, Campos dos Goytacazes, RJ, Brazil
| | - Niklas Borg
- Resorbable Devices AB, Ormvråksvägen 15, SE-756 52, Uppsala, Sweden
| | - Odd V Höglund
- Resorbable Devices AB, Ormvråksvägen 15, SE-756 52, Uppsala, Sweden. .,Department of Clinical Sciences, Swedish University of Agricultural Sciences, Box 7054, SE-750 07, Uppsala, Sweden.
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Höglund OV, Ingman J, Södersten F, Hansson K, Borg N, Lagerstedt AS. Ligation of the spermatic cord in dogs with a self-locking device of a resorbable polyglycolic based co-polymer--feasibility and long-term follow-up study. BMC Res Notes 2014; 7:825. [PMID: 25410023 PMCID: PMC4247741 DOI: 10.1186/1756-0500-7-825] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 11/05/2014] [Indexed: 11/15/2022] Open
Abstract
Background New surgical techniques are developed to enable a quicker, easier and safer surgery with reduced risk of complications and shortened time needed for recovery. A resorbable device, a self-locking loop, was designed for surgical ligation. The objective of this pilot study was to investigate the feasibility of ligating the spermatic cord with the device, its biocompatibility and long-term resorption in dogs. Results The device was made of a block co-polymer (glycolide and trimethylene carbonate), manufactured by injection moulding and consisted of a flexible band running through a case with a locking mechanism. Ten devices were tested for ligation of the spermatic cords in five dogs admitted for routine neutering. The dogs were monitored by physical examination and ultrasonography of the site of ligation, area of spermatic cord and medial iliac lymph nodes regularly until no hyperechoic remnants of the device or acoustic shadowing or local tissue reactions were observed. Haemostasis of the spermatic cords was achieved with the devices. On ultrasonography the devices were seen as hyperechoic structures for 2 months after neutering causing acoustic shadowing for 1 month. The dogs were monitored for 3 – 5 months after surgery. Gradual decrease in echogenicity and final disappearance of the hyperechoic structures suggested resorption. Macroscopic and histological post mortem examinations were performed in one dog at 3 months after surgery. Post mortem examination showed a tissue reaction of a suture granuloma that was restricted in extent at site of the device. Conclusions The results of this pilot study suggest biocompatibility and indicate that ligation of the spermatic cord is feasible with the device.
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Affiliation(s)
- Odd V Höglund
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Box 7054, SE-750 07 Uppsala, Sweden.
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12
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Hazenfield KM, Smeak DD. In vitro holding security of six friction knots used as a first throw in the creation of a vascular ligation. J Am Vet Med Assoc 2014; 245:571-7. [DOI: 10.2460/javma.245.5.571] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Aminlashgari N, Höglund OV, Borg N, Hakkarainen M. Degradation profile and preliminary clinical testing of a resorbable device for ligation of blood vessels. Acta Biomater 2013; 9:6898-904. [PMID: 23438863 DOI: 10.1016/j.actbio.2013.02.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 01/11/2013] [Accepted: 02/05/2013] [Indexed: 11/18/2022]
Abstract
A resorbable device for ligation of blood vessels was developed and tested in vitro to reveal the degradation profile of the device and to predict the clinical performance in terms of adequate mechanical support during a healing period of 1week. In addition, preliminary clinical testing was performed that showed complete hemostasis and good tissue grip of renal arteries in five pigs. The device was made by injection molding of poly(glycolide-co-trimethylene carbonate) triblock copolymer, and it consisted of a case with a locking mechanism connected to a partly perforated flexible band. A hydrolytic degradation study was carried out for 7, 30 and 60days in water and buffer medium, following the changes in mass, water absorption, pH and mechanical properties. A new rapid matrix-free laser desorption ionization-mass spectrometry (LDI-MS) method was developed for direct screening of degradation products released into the degradation medium. The combination of LDI-MS and electrospray ionization-mass spectrometry analyses enabled the comparison of the degradation product patterns in water and buffer medium. The identified degradation products were rich in trimethylene carbonate units, indicating preferential hydrolysis of amorphous regions where trimethylene units are located. The crystallinity of the material was doubled after 60days of hydrolysis, additionally confirming the preferential hydrolysis of trimethylene carbonate units and the enrichment of glycolide units in the remaining solid matrix. The mechanical performance of the perforated band was followed for the first week of hydrolysis and the results suggest that sufficient strength is retained during the healing time of the blood vessels.
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Affiliation(s)
- Nina Aminlashgari
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
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14
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Höglund OV, Hagman R, Olsson K, Carlsson C, Södersten F, Lagerstedt AS. Ligation of the ovarian pedicles in dogs with a resorbable self-locking device – a long-term follow-up study. J Biomater Appl 2011; 27:961-6. [DOI: 10.1177/0885328211431018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A prospective clinical trial was performed to evaluate applicability, hemostatic efficiency, and long-term tissue reactions of a novel medical device. The device was made of polydioxanone and designed in principle as a cable-tie with a flexible band running through a locking case. It was tested for ligation of the ovarian pedicles during ovariohysterectomy in nine intact female dogs. The dogs were followed-up monthly by physical examination and ultrasonography of the abdomen for 5–12 months after surgery. Macroscopic and histological post mortem examinations were performed in two dogs 7 and 18 months after surgery. Hemostasis was achieved with the devices although 1 of the 18 devices needed further tightening during a reoperation. Ultrasonography revealed a hyperechoic device that caused acoustic shadowing, which decreased over time indicating gradual resorption. Post mortem examinations demonstrated adhesions and a local transient tissue reaction at site of the device. The results show that the device may be a future alternative for ligation of ovarian pedicles in dogs.
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Affiliation(s)
- Odd V Höglund
- Department of Clinical Sciences, Box 7054, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden
| | - Ragnvi Hagman
- Department of Clinical Sciences, Box 7054, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden
| | - Kerstin Olsson
- Department of Anatomy, Physiology and Biochemistry, Box 7011, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden
| | - Carolina Carlsson
- University Animal Hospital, Box 7040, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden
| | - Fredrik Södersten
- Department of Biomedical Sciences and Veterinary Public Health, Box 7028, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden
| | - Anne-Sofie Lagerstedt
- Department of Clinical Sciences, Box 7054, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden
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