Retroperitoneal Research Articles

Effects of Flavonoids in Fructus Aurantii Immaturus on Carcass Traits, Meat Quality and Antioxidant Capacity in Finishing Pigs

This experiment aimed to explore the effects of flavonoids in Fructus Aurantii Immaturus (FFAI) on carcass traits, meat quality, and the antioxidant capacity of finishing pigs. The results indicated that the addition of an appropriate amount of FFAI into their diet could significantly reduce the backfat thickness and perirenal fat percentage of finishing pigs, as well as the drip loss, water-holding capacity, shear force, and the levels of lactate, glucose-6-phosphate, glucose, ATP, phosphofructokinase, and pyruvate in the longissimus dorsi (LD) muscle. It also elevated the levels of flavor amino acids such as glutamate, serine, and threonine, and enriched the composition of flavor substances, including benzene and octanal, which significantly contributed to the enhancement of pork flavor. Furthermore, it enhanced the expression levels of MyHC I and MyHC IIa. In summary, the appropriate addition of FFAI to the diet could improve the carcass traits, meat quality, and antioxidant capacity of finishing pigs. The optimal level of FFAI supplementation is 0.12%.

To the 60th anniversary of Igor Vitalievich Poddubny

Prof. Igor V. Poddubny, a member of the Editorial Board of the Russian Journal of Pediatric Surgery, Dr. Sci. (med), celebrated his 60th anniversary on September 25, 2024. The basic area of his interest and research is mini-invasive endoscopic surgeries in children and adolescents. He has developed and implemented into clinical practice modern surgical techniques for treating children with various emergency and elective surgeries in urology, coloproctology and gynecology. He was the first in Russia to perform endoscopic surgical interventions for varicocele, abdominal cryptorchidism, cysts of parenchymal organs of the abdominal cavity and retroperitoneal space, as well as laparoscopic nephrectomy, heminephroterectomy, adrenalectomy. He also operated patients with Hirschsprung's disease, ulcerative colitis, Crohn's disease, colon polyposis, complex malformations of the uterus and vagina, etc.

Difficulties in differential diagnosis of preeclampsia and acute surgical pathology

Aim: to determine the prevalence of preeclampsia and HELLP syndrome among patients hospitalized in surgical departments with complaints of pain in the epigastrium, right hypochondrium and/or nausea and vomiting. Material and methods. An analysis was carried out of visits from pregnant women over 20 weeks to the surgical department in 2023 and 42 cases of hospitalization of pregnant patients with suspected acute surgical pathology hospitalized in surgical departments No. 6 and No. 7 of the Samara City Clinical Hospital No. 1 named after. N.I. Pirogov." The following parameters were assessed: age, gestational age, complaints at the time of admission, general blood test data, urine, biochemical blood parameters (ALT, AST, total protein, creatinine, urea, total bilirubin, LDH, amylase, alkaline phosphatase, CRP), the presence of protein in urine, the state of the hemostatic system, the condition of the fetus according to ultrasound, ultrasound, CTG, the presence of obstetric and gynecological pathology and somatic diseases. Results. Patients with acute appendicitis (7 out of 42 pregnant women) were excluded from the study. Of the remaining 35 patients, the diagnosis of severe preeclampsia, HELLP syndrome was made in 3 cases (8.6%), in 2 cases gestational hypertension or protineria (5.7%) - the main group. Cholelithiasis, acute cholecystitis - in 2 cases (5.7%), in other cases the diagnosis of acute pancreatitis was made - 28 patients (80.0%). The work provides a comparison of clinical and laboratory parameters of patients in two groups - with obstetric and surgical pathology. An clinical case of a combination of severe PE with the development of HELLP-syndrome and cholecystitis is also presented. Conclusions. Based on numerous literature data and the results of our work, we can confidently say that the differential diagnosis between obstetric complications such as PE and HELLP syndrome and acute surgical pathology still remains a pressing interdisciplinary problem. Severe forms of PE can take the form of acute pancreatitis, acute cholecystitis, or exacerbation of chronic diseases of the abdominal cavity and retroperitoneal space. According to the results of our observation, this phenomenon occurred in 15% of patients hospitalized in surgical departments.

Perirenal Fat CT Radiomics-Based Survival Model for Upper Tract Urothelial Carcinoma: Integrating Texture Features with Clinical Predictors

Background: Upper tract urothelial carcinoma (UTUC) presents significant challenges in prognostication due to its rarity and complex anatomy. This study introduces a novel approach integrating perirenal fat (PRF) radiomics with clinical factors to enhance prognostic accuracy in UTUC. Methods: The study retrospectively analyzed 103 UTUC patients who underwent radical nephroureterectomy. PRF radiomics features were extracted from preoperative CT scans using a semi-automated segmentation method. Three prognostic models were developed: clinical, radiomics, and combined. Model performance was assessed using concordance index (C-index), time-dependent Area Under the Curve (AUC), and integrated Brier score. Results: The combined model demonstrated superior performance (C-index: 0.784, 95% CI: 0.707–0.861) compared to the radiomics (0.759, 95% CI: 0.678–0.840) and clinical (0.653, 95% CI: 0.547–0.759) models. Time-dependent AUC analysis revealed the radiomics model’s particular strength in short-term prognosis (12-month AUC: 0.9281), while the combined model excelled in long-term predictions (60-month AUC: 0.8403). Key PRF radiomics features showed stronger prognostic value than traditional clinical factors. Conclusions: Integration of PRF radiomics with clinical data significantly improves prognostic accuracy in UTUC. This approach offers a more nuanced analysis of the tumor microenvironment, potentially capturing early signs of tumor invasion not visible through conventional imaging. The semi-automated PRF segmentation method presents advantages in reproducibility and ease of use, facilitating potential clinical implementation.

A novel low-cost high-fidelity porcine model of liver metastases for simulation training in robotic parenchyma-preserving liver resection.

In the era of minimally invasive surgery (MIS), parenchyma-preserving liver resections are gaining prominence with the potential to offer improved perioperative outcomes without compromising oncological safety. The surgeon learning curve remains challenging, and simulation plays a key role in surgical training. Existing simulation models can be limited by suboptimal fidelity and high cost. We describe a novel, reproducible, high-fidelity, low-cost liver metastases model using porcine livers from adult Landrace pigs, with porcine perinephric fat used to simulate subcapsular metastases. This model was then utilised in a training session for surgical trainees performing robotic parenchyma-preserving surgery (PPS) under the guidance of expert robotic surgeons, with feedback being recorded. Trainees rated the model highly on its fidelity to human liver simulation (median score 9), tissue handling (median score 8), and overall usefulness (median score 9). Tissue handling was felt to simulate in vivo liver resection closely, while suggestions for improvement included adding simulated blood flow. This is a novel, low-cost, high-fidelity simulation model of liver metastases with high acceptability to surgical trainees, which could be readily adopted by other training centres.

Perirenal fat thickness is an independent predictor for metabolic syndrome in steatotic liver disease

The objective of our study is to measure perirenal fat thickness using MRI in individuals with steatotic liver disease and investigate the relationship between perirenal fat thickness and metabolic syndrome. This retrospective study included consecutive patients with steatotic liver disease who underwent magnetic resonance imaging-proton density fat fraction from October 2018 to February 2020. Among them, patients with crossed fused kidneys or who underwent nephrectomy were excluded. The metabolic abnormalities were reviewed; presence of hypertension, type 2 diabetes, abdominal circumference, triglyceride, and high-density lipoprotein. Perirenal fat was measured in four directions in both kidneys and the total sum of them was calculated. A total of 250 patients (140 males and 110 females) were included. Perirenal fat thickness showed a moderate correlation with waist circumference, creatinine, and hepatic fat fraction (all p < 0.001). Perirenal fat thickness was significantly higher in patients with metabolic syndrome than in patients without (76.8 mm vs. 65.1 mm, p = 0.004). In multivariable regression analysis, the group with high perirenal fat thickness had as significantly higher odd ratio of 2.71 compared to the low group. The perirenal fat thickness is independently associated with metabolic syndrome in patients with steatotic liver disease.

The effect of breed on ivermectin residues in the edible tissues of cattle and the estimated withdrawal period

This study analyzed the residue depletion kinetics of ivermectin (IVM) in Nelore and crossbred (Nelore x Angus) cattle aiming to compare the profiles between the breeds and evaluate the residue levels at the injection site. IVM 1%, at a dose of 0.2 mg/kg, was administered via the subcutaneous route, and tissue samples were collected on different days post administration for analysis by LC–MS/MS. The results revealed that the detection of the marker residue in conventional matrices such as the liver, perirenal fat, and trapezius muscle (injection site) had relatively high residue concentrations. The maximum residue limit (MRL) was exceeded at the injection site at 21- and 35-days post administration in crossbred and Nelore animals, respectively, with significant variations between animals. This study highlighted significant challenges in accurately determining the pharmacokinetic profile and withdrawal periods of IVM in cattle due to high variability in tissue residue data, particularly at injection sites. The comparison of IVM concentrations between cattle breeds was hindered by high standard errors, emphasizing the need for more rigorous sampling protocols. The results suggest that current guidelines may not adequately account for the erratic depletion kinetics of injectable formulations like IVM, especially at injection sites. Therefore, improving sampling techniques and revising guidelines are essential for accurate residue monitoring and withdrawal period determination.

IgG4-related Breast Disease: Review of the Literature.

IgG4-related disease (IgG4-RD) is a rare illness with inflammatory and fibrotic changes in affected organs such as pancreas, thyroid, salivary or lacrimal glands, and retroperitoneal space; rarely other organs may be involved. IgG4-related breast disease (IgG4-BD) is very rare and generally presents as a lump or mastitis. IgG4-BD as a presenting feature of IgG4-RD is extremely rare. Hence, this paper reviews the known (n=48) IgG-BD cases reported in the literature to date. The majority of cases were diagnosed on routine mammography or during assessment for other clinically significant features. The absence of a lump border, and especially the absence of calcifications on ultrasonography, mammography, or computed tomography, is typical for IgG4-BD. Characteristic IgG4-BD pathological findings were dense lymphoplasmacytic infiltration with stromal fibrosis, and more than 10% IgG4+ plasma cells/high-power field (HPF); the mean percentage of IgG4+/IgG+ plasma cells was 54.2%, and only one-third of the patients had all "classical" signs of IgG4-BD including storiform fibrosis and obliterative phlebitis. Most of the cases had a benign course and responded to surgical excision with or without steroid therapy.

Life-Threatening Spontaneous Hematoma in Unusual Sites in Patients with COVID-19 on Anticoagulant Therapy: A Case Series

Thromboembolic manifestations are a common phenomenon in patients affected by corona virus (SARS CoV-2). Recent studies have shown that patients with acute renal failure are also at a greater risk of venous and arterial thromboembolism, 15-30% in ICU, and 7% inpatient care. However, frequently unjudicial use of anticoagulants may develop severe life-threatening hematoma. In our hospital settings we had a dedicated COVID Unit with a Hemodialysis facility. Our Nephrology department had managed 381 patients being COVID positive along with renal impairment from March 2020 to January 2022. Among these patients, four patients developed spontaneous non traumatic hematoma in unusual sites. On admission all the patients received treatment according to our national guidelines for COVID-19. Cases: It is a retrospective analysis in a single-centered hospital. Four cases with confirmed COVID-19 with acute kidney injury and on anticoagulant therapy had developed sudden concealed bleeding. These patients had no previous history of anticoagulant therapy before admission. Case 1 developed hemorrhage in Right lower anterior paramedian deep parietal wall of abdomen, Case 2 had hematoma in retroperitoneal space and in lower third of Iliopsoas, Case 3 developed hemorrhage in left cerebral hemisphere, Case 4 had Intramuscular Hematoma in left rectus abdominis. Out of these four patients two of them required Hemodialysis and one of them went into shock. All patients included were male. The mean age was 57±19.64years. All the four patients were initially managed conservatively with keen monitoring and with proper volume resuscitation, blood transfusion and discontinuation of the anticoagulants. Three of the patients survived with conservative management and one patient died due to sudden massive cardiac arrest. The use of therapeutic anticoagulant can increase the risk of bleeding in atypical sites and may exhibit higher patient death with COVID-19 if not identified at early stage. So a risk-benefit ratio of usage of anticoagulants should be kept in mind and further clinical trials needed to justify its random use in COVID-19. J Bangladesh Coll Phys Surg 2024; 42: 393-400

Single-Port Versus Multi-Port Robotic Retroperitoneal Partial Nephrectomy: A Propensity Score-Matched Comparison.

Objective: To compare the surgical results of retroperitoneal (RP) robot partial nephrectomy (PNx) using either a single-port robot (SP) or a multi-port robot (MP). Materials and Methods: We retrospectively reviewed all RP robotic PNx performed at a single institution from September 2021-when the SP robot was introduced to the institution-through April 2023. In total, 125 patients underwent the surgery; 81 patients were treated with surgery using a MP robot whereas 44 patients were treated with surgery using a SP. All MP surgeries were performed with da Vinci Xi (Intuitive, Sunnyvale, California, USA), while all SP surgeries were performed with da Vinci SP (Intuitive, Sunnyvale, California, USA). We performed a propensity score-matching (PSM) analysis of these 125 patients. Results: There was no significant difference between the two groups after PSM. In terms of operation time, that for MP was 103.68 ± 21.89 minutes whereas that for SP was 95.43 ± 32.22 minutes (p-value = 0.164). Meanwhile, in terms of console time, that for MP was 70.95 ± 21.92 minutes whereas that for SP was 64.14 ± 32.06 minutes (p-value = 0.248). In terms of estimated blood loss was 90.91 ± 91.06 mL in MP and 92.27 ± 104.30 mL in SP (p-value = 0.948). Lastly, there was a statistically significant difference in warm ischemic time, as it was 17.18 ± 6.56 minutes in MP and 13.82 ± 4.59 in SP (p-value = 0.007). There were no statistically significant differences between MP and SP in any other surgical outcomes. Conclusions: SP robot RP PNx demonstrated comparable outcomes to those achieve using MP procedures. This means SP robot RP PNx can be considered a preferable and more convenient surgical approach than conventional methods, particularly when dealing with small renal masses located in the posterior side of the kidney.

Comprehensive neurosurgical and visceral surgical therapy of retroperitoneal nerve tumors: a descriptive and retrospective analysis.

Nerve tumors in the retroperitoneal space are a rarity. Radical surgery according to soft tissue tumors can lead to persistent pain and neurological deficits. This study aims to evaluate clinical outcomes of patients treated by a visceral- / neurosurgical approach. 33 patients with a retroperitoneal nerve tumor underwent surgery between 01/2002 and 12/2022 at our department. A visceral surgeon provided access to the retroperitoneal space, followed by micro-neurosurgical tumor preparation under neuromonitoring. Clinical examination and MRI were performed 12 weeks after surgery and further 3 months (WHO grade > 1) or 12 months (WHO grade 1). Further examinations were based on MRI findings and residual symptoms with median follow-up time of 24 months. One patient was treated for two distinct masses resulting in a total of 34 histological findings. Schwannomas (n = 15; 44.1%) and neurofibromas (n = 10; 29.4%) were the most common tumors. Long-term improvements were noted in radicular pain (15/18 patients; 83.3%), motor deficits (7/16 patients; 43.8%), abdominal discomfort and pain (5/7 patients; 71.4%). Recurrences were observed in 3/33 (9,1%) patients. This study represents the largest series of retroperitoneal BPNSTs treated with microsurgical techniques. Prospective multicenter studies are warranted to establish standardized treatment guidelines.

Effect of Using Prickly Pear Seed Cake (Opuntia ficus indica L.) on Growth Performance, Digestibility, Physiological and Histometric Parameters in Rabbits

Prickly pear (Opuntia ficus indica L.) could be used in rabbit nutrition in compliance with circular economy principles, global warming issues, and reduction of production costs. This study aims to evaluate the effects of dietary incorporation of prickly pear seed cake (PPSC) on growth, physiological, and histometric parameters in rabbits. A total of 105 rabbits were divided into three experimental groups (n = 35) and fed different diets: a commercial feed (C group), the same feed with alfalfa replaced by PPSC at 10% (10PP group), and at 20% (20PP group). They were group-housed in cages with 5 animals per cage from weaning until slaughtering. While body weights and weight gains were similar in all groups, the coefficients of nutrient digestibility of dry matter, fibers, and ashes, as well as the characteristics of intestinal villi, were improved in the 10PP group compared to the others (p &lt; 0.05). The 20PP group showed a reduction in perirenal and interscapular fat (p &lt; 0.05), as well as lower plasma concentrations of triglycerides and cholesterol compared to the C group (p &lt; 0.001). In conclusion, PPSC can be incorporated into the diets of growing rabbits up to 20% as a partial substitute for alfalfa without the impairment of growth performance. Additionally, the inclusion of PPSC enhanced nutrient digestibility and increased the intestinal absorption surface area.

Renal Oncocytoma: A Systematic Review of Its Metastatic Features.

Oncocytomas are referred to as benign kidney neoplasms. They primarily affect adults, with patients over 70 years old being the most affected. Renal oncocytomas (ROs) are frequently detected by excision, biopsy, or scan. Hematuria, flank pain, and a palpable mass are the traditional trio of symptoms. Oncocytomas appear as well-circumscribed, tanor mahogany-coloured masses with a central scar that is stellate. Histological features include well-circumscribed lesions, bland cytology, eosinophilic cytoplasm, regular nuclei with prominent central nucleoli, and nested architecture. ROs are rarely linked to an aggressive clinical course and have an excellent prognosis. There is proof that the disease can spread to the liver and bones.Some literature has also reported oncocytoma metastases to the lung and liver. This systematic review of the literature examines and evaluates the malignant potential of oncocytoma. The purpose of the study was to determine whether ROs can be diagnosed as a benign condition or if malignancy needs to be considered and investigated. Seventeen studies were analysed which had a total of 412 ROs. Four patients (one percent) died as a result of their illness. There was evidence of disease progression in every patient who passed away from their illness. Six patients (1.5%) experienced disease progression in total. Three hundred and seventeen patients (80%) underwent radical nephrectomy, while 81 patients (20%) underwent partial nephrectomy. Liver, bone, lung, lymphadenopathy, and local recurrence were among the metastasis sites. Perinephric fat invasion, renal sinus fat invasion, renal capsular invasion, and vascular invasion are characteristics of metastatic behavior that have been found. Despite this, the small number of patients who experienced disease progression and/or death as a result of ROs implies that aggressive malignant behavior is not always correlated with the presence of metastatic features or disease. Oncocytomas should be viewed as having a low potential for malignancy rather than as benign. Individuals who exhibit aggressive characteristics, such as vascular invasion and/or perinephric fat invasion, have an atypically good prognosis. Despite advancements in imaging and immunochemical techniques, it is indisputable that ROs, which were first classified as renal tumours in 1976, continue to pose a diagnostic challenge for multidisciplinary teams.There is considerable variation in practice across the globe due to difficulties in confirming ROs, especially when it comes to metastatic disease. There is even more variation in the management of follow-up care that follows. This will remain the MDT's current state until randomised controlled trials, long-term results, and a better comprehension of the behavior of this tumour are obtained.

Postpubertal-Type Teratoma of the Retroperitoneal Space as a Late Recurrence of a Testicular Germ Cell Tumor: A Case Report With Clinical Insight

Postpubertal-Type Teratoma of the Retroperitoneal Space as a Late Recurrence of a Testicular Germ Cell Tumor: A Case Report With Clinical Insight

Transcriptome analysis reveals selectively high expression of beige adipocyte marker genes in mouse perinephric fat.

To reveal the differences in the properties of visceral adipose tissue in healthy unstimulated mice, we performed transcriptome analysis using RNA sequencing. Among visceral adipose tissues, perinephric adipose tissue was found to exclusively express beige adipocyte markers while expressing white adipocyte markers. These results imply potential specific roles of perinephric adipose tissue in both physiological and pathological conditions.

The characteristics of pediatric primary retroperitoneal teratoma and the influencing factors of perioperative complications

To explore the characteristics of pediatric primary retroperitoneal teratoma and the influencing factors of perioperative complications. The clinical data, imaging data, pathology results, perioperative complications, etc of patients with primary retroperitoneal teratoma admitted and treated at Shanxi Children's Hospital from March 2013 to September 2023 were retrospectively analyzed. The patients were divided into no complication group and complication group according to whether there were perioperative complications. The differences between the two groups were compared, and the influencing factors of complications were analyzed by multivariate logistic regression model. A total of 33 patients were included in this study, including 7 males and 26 females, with an age of [M (Q1, Q3), 9.0 (4.0, 24.0)] months. Nineteen cases had tumors located in the left upper abdomen and 14 cases in the right upper abdomen, among which 17 cases grew across the midline, with the maximum tumor diameter of (12.9±4.5) cm. All patients had anatomical displacement of retroperitoneal vessels and organs: the number of anatomical displaced arteries was 3 (3, 4), the number of anatomical displaced veins was 4 (3, 5), the number of anatomical displaced organs was 5 (4, 6). Pathologic examination revealed 28 mature teratomas (Grade 0 and Grade 1) and 5 immature teratomas (Grade 2 and Grade 3). There were 18 cases in no complication group and 15 cases in the complication group. The incidence of perioperative complications was 45.5% (15/33). The number of tumors crossing the midline (6/18 vs 11/15, P=0.037), the number of tumors adhering closely to the surrounding tissues (7/18 vs 12/15, P=0.033), the number of anatomical displaced veins [4 (3, 4) vs 5 (4, 5), P=0.001], and the number of anatomical displaced organs [4 (3, 5) vs 6 (5, 6), P=0.001] were significantly different between the two groups. Multivariate logistic regression model analysis showed that the number of anatomical displaced organs (OR=8.781, 95%CI: 2.155-35.784, P=0.002) was the influencing factor for perioperative complications of pediatric primary retroperitoneal teratoma.

The effect of pre-partum shearing of Corriedale ewes on placental and lamb development and neonatal behaviour.

To evaluate the effects of early and late pre-partum shearing of Corriedale ewes carrying single fetuses on placental and lamb development and neonatal lamb behaviour. At 70 days of gestation, 37 multiparous Corriedale ewes with known gestation dates were randomly allocated into three groups: S70 (n = 12) and S110 (n = 12), shorn at Day 70 and 110 of gestation, and US (n = 13), that were not shorn pre-partum. Gestation length, lambing duration, placental expulsion time, placental weight, number and weight of cotyledons, and placental efficiency (lamb weight/placental weight) were determined. At birth, body temperature, weight, morphometric measurements, ponderal index (lamb weight/lamb crown-rump length) and behaviour were recorded, with weight remeasured 72 hours later. Four male lambs per group were slaughtered immediately after parturition, and organ weight and perirenal brown fat weight and energy content recorded. Pre-partum shearing, regardless of timing, increased total dried placental weight per ewe. Pre-partum shearing at Day 70 of gestation increased the number and mean weight of the > 2 to ≤ 3-cm cotyledons, while pre-partum shearing at Day 110 of gestation increased only the weight of these cotyledons. At birth and at 72 hours, lambs from ewes shorn either at 70 days of gestation (birth: 5.5 (95% CI = 4.6-6.4) kg, p = 0.001; 72 hours: 6.4 (95% CI = 6.1-6.8) kg, p = 0.002) or at 110 days of gestation (birth: 5.4 (95% CI = 4.4-6.4) kg, p = 0.001; 72 hours: 6.5 (95% CI = 5.9-7.1) kg, p = 0.001) were heavier than lambs from unshorn ewes (birth: 4.0 (95% CI = 3.3-4.8) kg; 72 hours: 4.8 (95% CI = 3.5-6.1) kg). Lambs born to S70 and S110 ewes suckled sooner (31.5 (95% CI = 14.5-48.5) minutes, p = 0.001; and 39.3 (95% CI = 23.7-55.0) minutes, p = 0.001 respectively), than lambs born to the US group (70.3 (95% CI = 38.6-102.1) minutes). There was no evidence for an effect of pre-partum shearing on gestation length, parturition length, time of placental expulsion, placental efficiency, weight and energy of perirenal brown fat, and lamb temperature at birth. Shearing ewes pre-partum may lead to placental changes affecting lamb development and behaviour and associated with higher survival. The findings suggest pre-partum shearing may improve lamb survival, farm profitability and sustainability.

Description and Outcomes of an Ultrasound-Guided Technique for Catheter Placement in the Canine Quadratus Lumborum Plane: A Cadaveric Tomographic Study and Clinical Case Series.

This study aimed to describe an ultrasound-guided technique for implanting catheters for local anesthetic administration into the quadratus lumborum (QL) inter-fascial plane in canine cadavers and assessing the spread along the vertebral bodies (VBs) by computed tomography (CT). Phase 1: eight canine cadavers received one catheter per hemiabdomen, followed by injection of contrast media solution [low volume (LV) 0.3 mL kg-1 or high volume (HV) 0.6 mL kg-1]. Phase 2: postoperative pain of five dogs was managed by injecting 0.3 mL kg-1 of ropivacaine 0.5% through QL catheters every eight hours, up to 72 h after abdominal surgery. Pain was assessed using the Short Form of the Glasgow Composite Measure Pain Scale, and methadone 0.2 mg kg-1 was administered intravenously when the pain score was ≥6. The number of VBs stained by the contrast solution between the QL and psoas minor muscles was significantly higher in group HV than group LV. The catheter tip was visualized in the retroperitoneal space in 1/16 and 2/10 hemiabdomens in phases 1 and 2, respectively. Rescue analgesia was required in 3/5 dogs during the postoperative period. The QL catheter placement technique appears feasible and may be included in a multimodal analgesic approach for dogs undergoing abdominal surgeries.

How does finishing duration on lucerne pasture influence the muscle and fat spectro-colorimetric properties and dorsal fat firmness in lambs?

There are a number of differences in the meat and carcass quality traits between pasture-raised and concentrate-raised lambs that may further be used to trace back the diet, but the extent to which these differences are modulated by pasture-finishing duration is unknown. In this study, we investigated the changes in longissimus thoracis et lumborum muscle and fat spectrocolorimetric properties, and dorsal fat firmness, in lambs switched from a stall-fed concentrate-based diet to grazing on lucerne for various durations (0, 21, 42, 63 days) pre-slaughter. Stall-fed lambs from the different treatment groups were managed in a single group and lucerne pasture-finished lambs from the different treatment groups also co-grazed in a single group. The level of concentrate fed to stall-fed lambs was adjusted to maintain a similar mean pattern of growth between lucerne pasture-fed and stall-fed lambs. The trial used a total of 141 lambs over two successive years. Dorsal fat was firmer in lambs finished on lucerne pasture, even for the shortest finishing duration (21 days), the difference being of commercial importance. Dorsal fat colour and carotenoid content showed changes at 21 days on lucerne pasture but did not change further for longer lucerne pasture-finishing durations. In contrast, perirenal fat lightness, yellowness, chroma and carotenoid content showed changes at 21 days on lucerne pasture and increased consistently with lucerne pasture-finishing duration. Although these changes in fat spectrocolorimetric properties were not, or barely, visible to the naked eye, they could be of interest for authenticating the duration of lucerne pasture-finishing. Muscle redness increased consistently with the duration of lucerne pasture-finishing, the change becoming significant from 42 days on lucerne pasture and being visible to the naked eye. We observed a consistent decrease of muscle hue angle and perirenal fat redness and a consistent increase in perirenal fat hue angle with lucerne pasture-finishing duration, but these changes only became significant from 63 days on lucerne pasture. The pattern of change in the lamb carcass and meat quality traits measured according to lucerne pasture-finishing duration therefore varied between the tissues and quality traits.

Perirenal fat and chronic kidney disease in type 2 diabetes: The mediation role of afferent arteriolar resistance

AimPerirenal fat (PRF) is an independent predictor for chronic kidney disease (CKD) in type 2 diabetes mellitus (T2DM) patients. Previous studies speculated that PRF may promote renal dysfunction through affecting renal hemodynamics. To verify this hypothesis, we studied the relationship between PRF and renal hemodynamics in T2DM. Methods91 T2DM patients were included. PRF thickness (PRFT) was measured by magnetic resonance imaging. Glomerular filtration rate (GFR) and effective renal plasma flow (ERPF) were determined by renal dynamic imaging. Renal vascular resistance (RVR), glomerular hydrostatic pressure (PGLO), afferent (RA) and efferent (RE) arteriolar resistance were calculated by Gomez equations. Multiple linear regression was used to determine the relationship between PRFT and renal hemodynamics. Mediation analysis was conducted to estimate the mediation effects of renal hemodynamics on the relationship between PRF and CKD. ResultsAll patients were divided into three groups according to the tertiles of PRFT. Compared with patients in tertile 1, GFR and ERPF were significantly decreased in patients in tertile 3, while RVR and RA were significantly increased. PRFT was negatively correlated with GFR, ERPF and PGLO, and positively correlated with RVR and RA after adjustment for sex, age, visceral adipose tissue and treatments with ACE inhibitors/angiotensin receptor blockers and sodium-glucose cotransporter protein-2 inhibitors. Moreover, RVR and RA mediated the effect of PRF on GFR, with a mediated proportion of 29.1 % and 41.4 % respectively. ConclusionIn T2DM patients, PRF was negatively correlated with GFR, and positively correlated with RA. RA mediated the relationship between PRF and CKD.