Effects of pneumoperitoneum and body position on the morphology of the caudal cava vein analyzed by MRI and plastinated sections

López-Albors, Octavio; Sánchez-Margallo, F.M.; Moyano-Cuevas, José Luis; Latorre, Rafael

doi:10.1007/s00464-012-2528-5

Cited by 6 publications

(3 citation statements)

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“…The diameter of the portal vein and mean luminal area of the portal vein were also found decreased in other studies, which is consistent with a decrease of the portal vein flow with pneumoperitoneum [41,42]. The pressure of the pneumoperitoneum was also shown to decrease the diameter of the Inferior vena cava [43][44][45][46] and to cause a decrease of the blood flow in the vena cava [42]. These factors are in line with a decreased blood volume in the liver during pneumoperitoneum which likely caused the decrease liver volume.…”

Section: Discussionsupporting

confidence: 83%

Effects of laparoscopy, laparotomy, and respiratory phase on liver volume in a live porcine model for liver resection

et al. 2021

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Background Hepatectomy, living donor liver transplantations and other major hepatic interventions rely on precise calculation of the total, remnant and graft liver volume. However, liver volume might differ between the pre- and intraoperative situation. To model liver volume changes and develop and validate such pre- and intraoperative assistance systems, exact information about the influence of lung ventilation and intraoperative surgical state on liver volume is essential. Methods This study assessed the effects of respiratory phase, pneumoperitoneum for laparoscopy, and laparotomy on liver volume in a live porcine model. Nine CT scans were conducted per pig (N = 10), each for all possible combinations of the three operative (native, pneumoperitoneum and laparotomy) and respiratory states (expiration, middle inspiration and deep inspiration). Manual segmentations of the liver were generated and converted to a mesh model, and the corresponding liver volumes were calculated. Results With pneumoperitoneum the liver volume decreased on average by 13.2% (112.7 ml ± 63.8 ml, p < 0.0001) and after laparotomy by 7.3% (62.0 ml ± 65.7 ml, p = 0.0001) compared to native state. From expiration to middle inspiration the liver volume increased on average by 4.1% (31.1 ml ± 55.8 ml, p = 0.166) and from expiration to deep inspiration by 7.2% (54.7 ml ± 51.8 ml, p = 0.007). Conclusions Considerable changes in liver volume change were caused by pneumoperitoneum, laparotomy and respiration. These findings provide knowledge for the refinement of available preoperative simulation and operation planning and help to adjust preoperative imaging parameters to best suit the intraoperative situation.

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Section: Discussionsupporting

confidence: 83%

Effects of laparoscopy, laparotomy, and respiratory phase on liver volume in a live porcine model for liver resection

et al. 2021

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“…Párraga et al () published the only work related to the abdominal cavity and used sheet plastination to study the pneumoperitoneum effect. They compared the plastinated sections with MRI images.…”

Section: Resultsmentioning

confidence: 99%

E12 sheet plastination: Techniques and applications

et al. 2017

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Plastination is an anatomical technique that consists of replacing the liquids and fat of specimens by reactive polymers through forced impregnation in a vacuum. These are then polymerized to achieve the final result. E12 sheet plastination involves epoxy resin impregnation of thin (2-4 mm) and ultra-thin (<2 mm) tissue sheets, producing dry, transparent, odorless, non-toxic and long-lasting sheets. E12 sheet plastination techniques were reviewed using MEDLINE, EMBASE and SciELO databases, and manual searches. After searching, 616 records were found using the online and manual searches (MEDLINE, n: 207; EMBASE, n: 346; SciELO, n: 44; Manual search: 23). Finally, 96 records were included in this review (after duplicates and articles unrelated to the subject were excluded). The aim of this work was to review the E12 sheet plastination technique, searching for articles concerning views of it, identifying the different variants implemented by researchers since its creation by Gunther von Hagens, and to identify its applications from teaching and research in anatomy to morphological sciences. Clin. Anat. 31:742-756, 2018. © 2017 Wiley Periodicals, Inc.

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“…Epoxy plastinated sections have also been used in the design and planning of arthroscopic approaches in the tarsus (Sora, Strobl, Staykov, & Förster‐Streffleur, ; Villamonte‐Chevalier et al, ) or in carpus (Sora & Genser‐Strobl, ), as well as for the evaluation of clinical pathologies in animal models (Párraga, López‐Albors, Sánchez‐Margallo, Moyano‐Cuevas, & Latorre, ).…”

Section: Discussionmentioning

confidence: 99%

E12 technique: Conventional epoxy resin sheet plastination

Latorre

Jong

Sora

et al. 2019

Anat Histol Embryol

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| INTRODUC TI ONEpoxy sheet plastination allows studying specimens and tissues at the sub-gross and microscopic levels without altering the original topography of the anatomical structures. This is possible because the sectioning of the specimen hardly changes the position of the tissues, the thickness of the section is around 2-3 mm, and the fresh cured epoxy resin is completely transparent. These properties, which allow a perfect correlation of the plastinated slices with images from imaging techniques such as CT and MRI, cannot be achieved by the conventional silicone techniques.The main steps of the E12 epoxy plastination techniques are similar to those of all plastination techniques, with the addition of sectioning during the specimen preparation. Specimen preparation (fixation-optional) includes ultrafreezing and sectioning, dehydration and degreasing, impregnation and casting/curing. The time of the whole process depends on the size and type of specimen, but in the case of small anatomical regions, it is approximately 3-4 weeks.It is important to highlight that epoxy plastination is suitable for any organ or tissue, even brain, when it comes as part of head sections. However, for brains, polyester (P40) technique is a better alternative as it was designed specifically for plastinated brain AbstractEpoxy plastination techniques were developed to obtain thin transparent body slices with high anatomical detail. This is facilitated because the plastinated tissue is transparent and the topography of the anatomical structures well preserved. For this reason, thin epoxy slices are currently used for research purposes in both macroscopic and microscopic studies. The protocol for the conventional epoxy technique (E12) follows the main steps of plastination-specimen preparation, dehydration, impregnation and curing/casting. Preparation begins with selection of the specimen, followed by freezing and slicing. Either fresh or fixed (embalmed) tissue is suitable for epoxy plastination, while slice thickness is kept between 1.5 and 3 mm. Impregnation mixture is made of epoxy E12 resin plus E1 hardener (100 ppw; 28 ppw). This mixture is reactive and temperature sensitive, and for this reason, total impregnation time under vacuum at room laboratory temperature should not last for more than 20-24 hr. Casting of impregnated slices is done in either flat chambers or by the so-called sandwich method in either fresh mixture or the one used for impregnation.Curing is completed at 40°C to allow a complete polymerization of the epoxy-mixture. After curing, slices can be photographed, scanned or used for anatomical study under screen negatoscope, magnification glass or fluorescent microscope. Based on epoxy sheet plastination, many anatomical papers have recent observations of and/ or clarification of anatomical concepts in different areas of medical expertice.

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Effects of pneumoperitoneum and body position on the morphology of the caudal cava vein analyzed by MRI and plastinated sections

Abstract: The pneumoperitoneum and reverse Trendelenburg position caused morphological and morphometrical changes in the prehepatic and hepatic portions of the CCV, which should assist in gaining a better understanding of the hemodynamic changes described in the literature.

Cited by 6 publications

References 20 publications

Effects of laparoscopy, laparotomy, and respiratory phase on liver volume in a live porcine model for liver resection

Effects of laparoscopy, laparotomy, and respiratory phase on liver volume in a live porcine model for liver resection

E12 sheet plastination: Techniques and applications

E12 technique: Conventional epoxy resin sheet plastination

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