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Milech V, Antunes BN, Caye P, Hartmann HF, Linhares MT, Cadiñanos VDS, da Cunha TR, Diniz HC, Brun MV. Gasless laparoscopic renal biopsy in canine cadavers: a preclinical study. BRAZILIAN JOURNAL OF VETERINARY MEDICINE 2023; 45:e000523. [PMID: 38149033 PMCID: PMC10750501 DOI: 10.29374/2527-2179.bjvm000523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 12/12/2023] [Indexed: 12/28/2023] Open
Abstract
In this study we aimed to analyze the feasibility of the gasless renal biopsy technique in canine cadavers. The cadavers were randomly divided into two groups: laparoscopic GCG, in which gasless laparoscopy was performed and GCP, laparoscopy with pneumoperitoneum was performed. The procedures were randomly performed on the right and left kidneys. The total surgical time, procedural steps, and intraoperative complications were recorded. The degree of difficulty of the surgical approaches was evaluated by the surgeon, assistant, and external evaluators. Renal samples were evaluated for quality, number of glomeruli, and proportion of renal cortex. The total operative time was higher in the GCG group than in the GCP group (p < 0.01). Additionally, positioning of the second portal and platform positioning took longer than the other steps. The surgical groups differed from each other in the Likert scale values for almost all the parameters regarding the difficulty of the surgical approaches (p < 0.05), with higher scores in the GCG group than in the GCP group. Based on the video recordings, the GCP group had higher scores than the GCG group for degrees of difficulty of the approach (p < 0.05). Renal histological parameters were similar between the surgical groups and surgical sides. Our study findings indicate that the proposed gasless renal biopsy technique is feasible. The longer operative time and technical difficulties in the gasless approach did not affect the quality of the renal specimens.
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Affiliation(s)
- Vanessa Milech
- Veterinarian, DSc. Programa de Pós-Graduação em Medicina Veterinária (PPGMV), Laboratório de Cirurgia Experimental, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil.
| | | | - Pâmela Caye
- Veterinarian, MSc. PPGMV, Laboratório de Cirurgia Experimental, UFSM, Santa Maria, RS, Brazil.
| | - Hellen Fialho Hartmann
- Veterinarian, DSc. Programa de Pós-Graduação em Medicina Veterinária (PPGMV), Laboratório de Cirurgia Experimental, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil.
| | - Marcella Teixeira Linhares
- Veterinarian, DSc. Programa de Pós-Graduação em Medicina Veterinária (PPGMV), Laboratório de Cirurgia Experimental, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil.
| | | | | | - Helena Castro Diniz
- Veterinarian, Departamento de Clínica de Pequenos Animais, UFSM, Santa Maria, RS, Brazil.
| | - Maurício Veloso Brun
- Veterinarian, DSc. Departamento de Clínica de Pequenos Animais, Laboratório de Cirurgia Experimental, UFSM, Santa Maria, RS, Brazil.
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Gupta A, Brown E, Davis JT, Sekabira J, Ramanujam N, Mueller J, Fitzgerald TN. KeyLoop: Mechanical Retraction of the Abdominal Wall for Gasless Laparoscopy. Surg Innov 2021; 29:88-97. [PMID: 34242531 DOI: 10.1177/15533506211031084] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background. Despite favorable outcomes of laparoscopic surgery in high-income countries, its implementation in low- and middle-income countries (LMICs) is challenging given a shortage of consumable supplies, high cost, and risk of power outages. To overcome these barriers, we designed a mechanical retractor that provides vertical tension on the anterior abdominal wall. Methods. The retractor design is anatomically and mathematically optimized to provide exposure similar to traditional gas-based insufflation methods. Anatomical data from computed tomography scans were used to define retractor size. The retractor is constructed of biocompatible stainless steel rods and paired with a table-mounted lifting system to provide 5 degrees of freedom. Structural integrity was assessed through finite element analysis (FEA) and load testing. Functional testing was performed in a laparotomy model. Results. A user guide based on patient height and weight was created to customize retractor size, and 4 retractor sizes were constructed. FEA data using a 13.6 kg mass (15 mm Hg pneumoperitoneum) show a maximum of 30 mm displacement with no permanent deformation. Physical load testing with applied weight from 0 to 13.6 kg shows a maximum of 60 mm displacement, again without permanent deformation. Retraction achieved a 57% larger field of view compared to an unretracted state in a laparotomy model. Conclusions. The KeyLoop retractor maintains structural integrity, is easily sterilized, and can be readily manufactured, making it a viable alternative to traditional insufflation methods. For surgeons and patients in LMICs, the KeyLoop provides a means to increase access to laparoscopic surgery.
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Affiliation(s)
- Aryaman Gupta
- Department of Biomedical Engineering, 3065Duke University, Durham, NC, USA
| | - Erin Brown
- Department of Biomedical Engineering, 3065Duke University, Durham, NC, USA
| | - Joseph T Davis
- Department of Radiology, 3065Duke University, Durham, NC, USA
| | - John Sekabira
- Department of Pediatric Surgery, 249321Mulago Hospital, Kampala, Uganda
| | - Nimmi Ramanujam
- Department of Biomedical Engineering, 3065Duke University, Durham, NC, USA.,Duke Global Health Institute, Durham, NC, USA
| | - Jenna Mueller
- Department of Bioengineering, University of Maryland, College Park, MD, USA
| | - Tamara N Fitzgerald
- Duke Global Health Institute, Durham, NC, USA.,Department of Surgery, 3065Duke University, Durham, NC, USA
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Pressure-Volume Curve during Capnoperitoneum in Cats. Animals (Basel) 2020; 10:ani10081408. [PMID: 32823512 PMCID: PMC7459975 DOI: 10.3390/ani10081408] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 08/02/2020] [Accepted: 08/05/2020] [Indexed: 11/17/2022] Open
Abstract
Laparoscopy is a growing field in veterinary medicine, although guidelines are lacking. The objective of this study was to evaluate the pressure-volume curve during capnoperitoneum in cats. A total of 59 female cats were scheduled for routine laparoscopy. Pressure and volume data were recorded and processed, and the yield point of the curve was calculated using a method based on a capacitor discharging function. For the remaining 40 cats, a linear-like pressure-volume curve was observed until a yield point with a mean cutoff pressure (COP) of 6.44 ± 1.7 mmHg (SD) (range, 2.72-13.00 mmHg) and a mean cutoff volume (COV) of 387 ± 144.35 mL (SD) (range, 178.84-968.43 mL) was reached. The mean mL/kg CO2 value in cats was 208 ± 34.69 mL/kg (range, 100.00-288.46 mL/kg). The COV correlated with COP and body weight but not with body condition score (BCS). COP correlated only with the COV. This study suggests that feline patients have a pressure-volume curve similar to that of canine patients, and the same pressure limit recommendations can be used for both species. After a yield point of 6.44 mmHg is reached, the increment in volume decreases exponentially as the intra-abdominal pressure (IAP) increases.
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McCracken BD, Beths T, Herbert S, Ryan SD. COMPARISON OF ISOBARIC AND INSUFFLATED LAPAROSCOPY-ASSISTED OVARIOHYSTERECTOMY IN THE COMMON RABBIT (ORYCTOLAGUS CUNICULUS). J Exot Pet Med 2019. [DOI: 10.1053/j.jepm.2018.08.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Katic N, Dupré G. Advances in endoscopic surgery for small animal reproduction. Reprod Domest Anim 2016; 51 Suppl 1:25-30. [PMID: 27670937 DOI: 10.1111/rda.12784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Although endoscopic surgery entered its "golden era" in the mid-1980s, it is still advancing at a tremendous pace. Novel surgical techniques and devices are continuously developed and applied, and new indications (and/or contraindications) for the use of endoscopic surgery are routinely reported in the literature and subjected to systematic assessments. Although endoscopic surgery (laparoscopy in particular) has already become established as the gold standard in human medicine, it has yet to be proven as a viable alternative to open surgery in the field of veterinary medicine. The advantages of minimally invasive surgery include better intra-operative visualization, reduced postoperative pain, reduced scar formation and increased postoperative mobility. Therefore, it is reasonable to expect that the application of this will continue to expand. Small animal reproduction, a field within the broad discipline of veterinary medicine, has already recognized and begun to reap the benefits of endoscopic surgery. Herein, we retrospectively review the most recent successful novel applications of endoscopic surgery in the small animal reproduction system to provide small animal reproductive surgeons with important knowledge to help improve their own veterinarian medical practice.
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Affiliation(s)
- N Katic
- Division for Small Animal Surgery, Department for Companion Animals and Horses, University Hospital for Small Animals, University of Veterinary Medicine, Vienna, Austria.
| | - G Dupré
- Division for Small Animal Surgery, Department for Companion Animals and Horses, University Hospital for Small Animals, University of Veterinary Medicine, Vienna, Austria
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