Comparison of the complications and long-term results of heparin-coated and non-heparin-coated symmetric-tip hemodialysis catheters.

BACKGROUND: Tunneled catheters are effectively used in patients receiving chronic dialysis due to end-stage renal disease. However, the dysfunction of catheters caused by infection or thrombus requires repetitive procedures. In this study, we aimed to compare the long-term results of heparin-coated and non-heparin-coated tunneled dialysis catheters. METHOD: The study included a total of 161 patients who underwent tunneled dialysis catheter placement. Heparin-coated and non-heparin-coated tunneled catheters were placed in 81 and 80 patients, respectively. Of all the patients, 89 (55.3%) were male and 72 (44.7%) were female. The mean age of the patients was 64.3 ± 15.3 years. The patients were followed up for 12 months. RESULTS: Catheter infection developed in 10 (6.2%) of the cases, of which seven (70%) resolved with antibiotic therapy and the remaining three (30%) required catheter replacement. There was no significant difference between the groups in terms of the catheter infection rate (p = 0.84). Fibrin sheaths developed in nine (5.5%) patients. Fibrin sheath development was found to be significantly higher in the non-heparin-coated catheters (p = 0.017). There was no significant difference in fibrin sheath formation between the patients with and without systemic antiaggregant use (p = 0.864). The mean catheter durability time was determined to be 11 months in both groups (p = 0.704). Catheter survival was similar in heparin-coated and non-heparin coated catheters. CONCLUSION: This study showed that the rate of fibrin sheath development was significantly lower in heparin-coated tunneled catheters than non-heparin-coated catheters. There was no significant difference between the two catheters in terms of the rates of infection and mechanical complications.

Ultrasound-Guided Popliteal Sciatic Nerve Block: A Minimally Invasive Method for Pain Control During Endovascular Treatment of Critical Limb Ischemia.

PURPOSE: To evaluate the safety and effectiveness of ultrasound-guided popliteal sciatic nerve block (PSNB) for pain control in endovascular treatment of critical limb ischemia (CLI). MATERIALS AND METHODS: This retrospective study included 252 patients who underwent endovascular treatment for CLI between January 2020 and August 2022. Of these, 69 patients underwent PSNB, whereas moderate procedural sedation and analgesia was delivered in 183 patients. Pain scores were assessed using the visual analog scale (VAS) before and during the intervention. Technical and clinical success of PSNB, duration of the procedure, time to onset of nerve block, time for block resolution, and adverse events were recorded. Patient and operator satisfaction were assessed using the Likert scale. RESULTS: All PSNB procedures were technically and clinically successful, and the mean procedural duration of PSNB was 5.0 minutes ± 0.8 (range, 4-7 minutes). Prolonged effect of PSNB was observed in 3 patients, which resolved within 24 hours. No adverse events were encountered. Median VAS score was significantly lower in the PSNB group than in the moderate procedural sedation and analgesia group during endovascular treatment (0 [range, 0-2] vs 3 [range, 0-7]; P < .001). Patient satisfaction was comparable ("very satisfied" in 66 [95.7%] vs 161 [88.0%]; P = .069). However, operator satisfaction was significantly higher in the PSNB group ("very satisfied" in 69 [100%] vs 161 [88.0%]; P = .003). CONCLUSIONS: PSNB is safe and effective for pain control during endovascular treatment of CLI. Low adverse event rates with high patient and operator satisfaction make PSNB a reasonable alternative for high-risk patients.

Evaluation of cardiovascular changes in patients with gastric wall fat halo sign.

BACKGROUND: This study aims to investigate the relationship between gastric wall fat halo sign and potentially associated cardiovascular disease (CVD) in thoracic computed tomography (CT). METHODS: Between October 2020 and January 2021, 62 patients with gastric wall fat halo sign and 62 controls were evaluated with thorax CT. Patient's height, weight, body mass index (BMI), sex, age, comorbidities, laboratory parameters, diameters of cardiac axes, aorta and pulmonary artery; aorta and coronary artery calcium scores were recorded for the two groups. RESULTS: No significant differences were found in sex, age, height, body weight or BMI between the two groups (p > 0.124). Patients with gastric wall fat halo sign had significantly larger diameters of the ascending aorta, the descending aorta, the main pulmonary artery, the right and left pulmonary arteries, and the short and long cardiac axes and a higher cardiothoracic ratio (CTR) than the control group (p < 0.001). Additionally, the calcium scores of the ascending, arcus, and descending aortas and the coronary arteries were significantly higher detected in patients group (p < 0.001). Patient group had significantly higher lipid profile, frequencies of diabetes mellitus (DM) and hypertension (HT) than control group (p<0.026). DISCUSSION: Patients with a gastric wall fat halo may show higher cardiovascular risk because of increased visceral fat tissue, vascular diameters, CTR, heart sizes, presence of DM, HT, increased lipid profile and calcium scores.

Percutaneous transhepatic management of biliary strictures in patients with dysfunctioning plastic biliary endoprostheses.

BACKGROUND: To evaluate the safety and outcomes of percutaneous transhepatic management of dysfunctioning plastic biliary endoprostheses (PBE) in patients with benign/malign biliary strictures. METHODS: Twenty-nine patients (22 men, 7 women; mean age of 60.7 (range 33-88) years) diagnosed with dysfunctioning PBE were included. Percutaneous transhepatic biliary drainage and subsequent PBE dislodgment into the bowel were performed in all cases. Patient demographics, etiology of the biliary stricture, indication, technical success, complications, and clinical outcomes were gleaned from medical records. RESULTS: Seventeen patients had malignant strictures, while 12 patients had benign conditions. A total of 36 PBE (33 straight, 3 double-J) were treated. Six patients had more than one PBE. Successful dislodgement of the PBE was achieved in 28 (96.6%) of the cases. Monorail threading was performed in 8 cases while dislodgement by balloon friction was utilized in 21 patients. There was no statistical significance between benign and malignant biliary strictures regarding dislodgement duration (p = 0.080). No major complication was encountered. Thirteen minor complications in 10 patients including abdominal pain (n = 8) and mild hemobilia (n = 5) were observed and treated conservatively. Uneventful passage of the PBE was reported by all patients with technical success. DISCUSSION: Percutaneous transhepatic methods aid as a reasonable alternative in the treatment of benign and malignant biliary strictures in patients with dysfunctioning PBE when endoscopic approaches fail or are not eligible.

Is microwave ablation therapy as effective as colorectal liver metastases in noncolorectal liver metastases?

BACKGROUND: The aim of the study was to evaluate the relationship between primary tumor type and the effectiveness of microwave ablation (MWA) therapy by comparing the technical and clinical outcomes of MWA in the treatment of colorectal liver metastases (CLM) and noncolorectal liver metastases (NCLM). METHODS: Between January 2019 and March 2021, 47 consecutive patients (25 male, 22 female) with a total of 63 unresectable hepatic metastases underwent MWA under ultrasound guidance. The patients were divided into CLM (n = 29) and NCLM (n = 18) groups. Patient demographics, procedural details, and complications were noted. The overall survival (OS) and disease-free survival (DFS) rates were also analyzed. RESULTS: Technical success was 100% in both groups. No major complication was observed. Three minor complications [fatigue (n = 2) and subcutaneous hematoma (n = 1)] were encountered. DFS rates were 88.9%, 71.9%, 64.9%, and 44.0% at 3, 6, 12, and 24-months, respectively, with a mean DFS of 17.4 months (95% CI: 15.1, 19.7). Also, OS rates were 93.7%, 90.0%, 76.8%, and 64.3%, at 3, 6, 12, and 24-months, respectively, with a mean OS of 18.5 months (95% CI: 16.2, 20.7). There was no significant difference in recurrence between the CLM and NCLM groups (p = 0.452). The recurrence rate in liver metastases > 3 cm in size was significantly higher than in metastases ≤ 3 cm in size (p < 0.001). DISCUSSION: MWA therapy is as effective in the NCLM group as in the CLM group, regardless of histologic type. Metastasis size (>3 cm) was correlated with the recurrence rate in the CLM and NCLM groups.

Retrograde Guidewire-Assisted Remodeling Technique: A Novel Technique for Endovascular Recanalization of Occluded Arterial Origins in Critical Limb Ischemia.

PURPOSE: The main objective of this study is to describe the retrograde guidewire-assisted remodeling technique (REGART), a novel technique, and assess its feasibility, safety, and effectiveness in the recanalization of ostial arterial occlusions without a visible stump in the critical limb ischemia (CLI). MATERIALS AND METHODS: A retrospective review of 387 patients who underwent endovascular treatment (EVT) for peripheral artery disease between January 2020 and June 2021 was performed. Among these, 23 patients (14 males [60.8%]) with a mean age of 64.2 (range: 55-72) years who underwent REGART were included. Patient demographics, procedural details, and outcomes were noted. RESULTS: The technical success rate was 95.6% (22/23). The angiographic success rate was 86.3% (19/22). The procedure-related complication rate was 21.7% (5/23), with 4 (17.4%) major complications and 1 (4.3%) minor complication. CONCLUSION: In the CLI, results of this trial suggest that REGART is feasible, effective, and with acceptable safety in the catheterization of occluded artery origins without a visible stump when conventional anterograde and retrograde techniques fail. Thus, the target occluded artery can be recanalized while preserving other arterial origins by minimizing dissection risk through subintimal balloon angioplasty at the bi-trifurcation level.

Ultrasound-Guided Subgluteal Sciatic Nerve Block for Pain Management during Endovascular Treatment for Below-the-Knee Arterial Occlusions.

PURPOSE: To evaluate the ability of subgluteal sciatic nerve block (SSNB) to provide pain control during endovascular treatment of below-the-knee (BTK) occlusions. MATERIALS AND METHODS: This randomized prospective controlled study evaluated 60 consecutive adult patients who underwent endovascular treatment for BTK occlusions. The patients were randomized into 2 equal groups; the SSNB group underwent SSNB in the subgluteal space under ultrasound guidance, while the control group received fentanyl as an analgesic. The visual analog scale (VAS) and Face, Legs, Activity, Cry, Consolability (FLACC) scale scores were recorded. RESULTS: Compared with the control group, the SSNB group showed significantly lower median VAS (0 [range, 0-30] vs 70 [range, 20-100], P < .001) and median FLACC scale (0 [range, 0-2] vs 6 [range, 3-10], P < .001) scores. There was no statistically significant difference between the 2 groups regarding the remaining parameters. There was a very strong correlation between the VAS and FLACC scale scores in both the SSNB (r = 0.805, P < .001) and control (r = 0.950, P < .001) groups. The procedure time and total balloon inflation time correlated with the VAS (r = 0.411, P = .024, and r = 0.402, P = .031, respectively) and FLACC scale (r = 0.431, P = .017, and r = 0.414, P = .022, respectively) scores in the control group but not in the SSNB group (r = 0.364, P = .056, and r = 0.300, P =.085, respectively, for correlation with VAS score and r = 0.730, P = .068, and r = 0.704, P = .075, respectively, for correlation with the FLACC scale score). CONCLUSIONS: SSNB is a highly effective and safe pain management modality for the endovascular treatment of BTK occlusions.

The relationship between vertebral deformities and thoracic arthropathy with back pain in Chronic Obstructive Pulmonary Disease.

OBJECTIVES: The aim of the study was to investigate the relationship between back pain and thoracic vertebral deformities and arthropathy in patients with COPD who underwent thorax CT scans to screen for lung nodules and cancer. MATERIALS AND METHODS: The data of patients who underwent thoracic CT and pulmonary function tests (PFTs) between July 2019 and February 2020 were retrospectively reviewed. The patients were divided into two groups: the COPD (n = 64) and control groups (n = 101), according to the PFT results. The CT images were evaluated for vertebral deformities, osteoporosis and thoracic vertebral joint arthropathy, and the Spinal Deformity Index (SDI) was calculated. RESULTS: Back pain was detected in 43.7% of the COPD patients and 20.9% of the controls. The patients with COPD had significantly higher rates of costotransverse, intervertebral, facet joint arthropathy, and osteoporosis than did the control group (P < .001). The OR analyses showed that the presence of a vertebral deformity (OR 4.42, 95% CI 2.26 - 8.63, P < .001), of facet joint arthropathy (OR 3.6, 95% CI 2.83-4.58, P < .001), and of costotransverse arthropathy (OR 2.20, 95% CI 1.47-2.77, P < .001) were associated with the presence of back pain. Although a strong positive correlation was found between the SDI and pain score, a moderate negative correlation was found between the FEV1% values and pain score. CONCLUSIONS: Back pain was present in patients with COPD and was related to vertebral deformities and facet and costotransverse joint arthropathy. Additional studies are required to clarify the relationships of back pain with musculoskeletal system diseases, including cervical and lumbar spine arthropathy and vertebral deformities.

The efficiency of susceptibility-weighted MRI in the differentiation of endometriomas from haemorrhagic ovarian cysts.

OBJECTIVES: The aim of the study was to investigate the efficiency of susceptibility-weighted magnetic resonance (MR) imaging (SWIs) in differentiating endometriomas from haemorrhagic ovarian cysts. MATERIALS AND METHODS: Between July 2017 and January 2019, 89 ovarian cystic lesions (57 endometriomas and 32 haemorrhagic cysts) that were identified as complicated cystic lesions on ultrasonography (US) and underwent lower abdominal MRI with susceptibility weighting were retrospectively evaluated. Final diagnoses were obtained with surgical pathological correlation and radiological-clinical follow-up. Two radiologists blinded to the final diagnoses retrospectively reviewed the images in consensus. The signal intensity on T1- and T2-weighted images and curved linear or punctate signal void areas on SWI were noted for the presence of lesions. RESULTS: Forty of the 57 endometriomas demonstrated the defined MRI criteria, including a cystic hyperintensity on T1-weighted images and hypointensity on T2-weighted images. The remaining 17 lesions did not demonstrate these criteria on conventional MR images. SWI showed punctate or curved linear signal void areas in 53 of 57 endometriomas (92.9%) and none of the haemorrhagic cysts. The sensitivity, specificity and accuracy of SWI in differentiating endometrioma from haemorrhagic cyst were 92.9%, 100.0%, and 95.5%, respectively. CONCLUSIONS: The addition of the SWI sequence to conventional MRI can help distinguish endometriomas from haemorrhagic ovarian cysts.

Role of T1 mapping to evaluate brain aging in a healthy population.

PURPOSE: To investigate the relationship between healthy brain aging and T1 relaxation time obtained by T1 mapping. MATERIALS AND METHODS: A total of 211 (102 males, 109 females; age range: 20-89 years; mean age: 54 years) healthy volunteers underwent T1 mapping between July 2018 and January 2019. Regions of interest (ROIs) were placed on T1 maps in different anatomical regions, including the thalamus, putamen, globus pallidus, head of the caudate nucleus, nucleus accumbens, genu of the corpus callosum, and frontal lobe white matter (WM). Additionally, linear and quadratic regression analyses of ROIs were performed. RESULTS: There were significant quadratic and negative linear correlations between T1 relaxation times in the thalamus, putamen, and age (p < .001). Although the nucleus accumbens did not show a significant relationship between T1 relaxation times and age by linear regression (p = .624), a statistically significant relationship was obtained by quadratic regression (p < .001). For the globus pallidus, head of the caudate nucleus, genu of the corpus callosum and frontal lobe WM the quadratic regression analysis showed a better relationship than the linear correlation analysis. CONCLUSION: Age-related changes in T1 relaxation time vary by location in GM and WM.

Contribution of DECT in detecting serosal invasion of gastric cancer

Background/aim: This study aimed to investigate the relationship between the iodine concentration (IC) of perigastric fat tissue as assessed by dual-energy computed tomography (DECT) and serosal invasion of gastric cancer. Materials and methods: A total of 41 patients underwent preoperative staging evaluation for gastric cancer using DECT between July 2015 and March 2018. Patients were divided into 2 groups based on pathology results: serosal invasion (stage T4a) and intact serosa (stages T1­T3). Cutoff values, the diagnostic efficacy of IC in the perigastric fat tissue, and the perigastric fat tissue/tumor (P/T) ratio were determined. Results: Among the 41 patients, 22 had stage T4a gastric cancer and 19 patients had gastric cancer with a stage lower than T4a. The mean IC of perigastric fat tissue and the P/T ratio were significantly higher in patients with serosal invasion than in those with intact serosa (P < 0.001). During the arterial phase, the area under the curve (AUC) was 0.915 and 0.854 for the IC of perigastric fat tissue and the P/T ratio, respectively. During the venous phase, the AUC was 0.890 and 0.876 for the IC of perigastric fat tissue and the P/T ratio, respectively. Conclusion: The IC in the perigastric fat tissue seems to be a reliable indicator for serosal invasion of gastric cancer.

Gastric wall fat halo sign in patients without intestinal disease.

PURPOSE: To investigate the relationship between gastric wall fat halo sign and visceral obesity with potentially associated diseases. MATERIALS AND METHODS: Between September 2015 and April 2017, 90 patients with gastric wall fat halo signs and 130 controls were prospectively evaluated. Patient height, weight, body mass index (BMI), sex, age, subcutaneous fat area (SFA), visceral fat area (VFA), total fat area (TFA), percentage of visceral fat (VF%) and the presence of colic or ileal fat halo signs, hepatic steatosis and aortic calcified plaques were recorded for the two groups. Cut-off values for the VFA, TFA, and VF% were determined and the diagnostic efficacy was calculated using receiver operating characteristic (ROC) curve analysis. RESULTS: No significant differences were found in age, BMI and SFA, but the VFA, VF%, TFA and frequencies of colic or ileal fat halo signs, hepatic steatosis and aortic calcified plaques were significantly higher in the patient group. The areas under the ROC curve (AUCs) were 0.803, 0.770 and 0.596 for VFA, VF% and TFA, respectively. The diagnostic efficacies of VFA and VF% were significantly higher than those of the TFA. CONCLUSION: Gastric wall fat halo signs may be observed in overweight people, especially those with increased VFA and VF%. Additionally, these signs are usually observed along with fat halo signs of the colon or terminal ileum. However, extensive studies are needed to clarify the relationship between gastric wall fat halo signs and type 2 diabetes, cardiovascular diseases and metabolic syndrome.

Evaluation of mesenteric panniculitis with computed tomography: benign condition or paraneoplastic syndrome?

Background/aim: This study aimed to investigate the prevalence and association of mesenteric panniculitis (MP) with other diseases and the clinicoradiological features of MP, and to examine computed tomography findings to estimate the presence of malignancy in patients with MP. Materials and methods: Between September 2012 and August 2016, we used a keyword search to identify patients diagnosed with MP. Associated diseases and malignancies of patients were recorded. Cut-off values and diagnostic efficiencies of total MP scores and short and long diameters of the greatest lymph nodes were determined. Results: Out of 22,033 patients, 309 were determined to have MP (prevalence 1.40%); 57.9% of these patients had a malignancy and 42.1% did not have a malignancy. The mean total MP scores and diameters of the greatest lymph nodes were significantly higher in the patients with a malignancy (P < 0.001). AUCs were 0.728, 0.879, and 0.767 for the short diameter, long diameter, and total score, respectively. The diagnostic efficiencies of the long diameter of the greatest lymph nodes were significantly higher than the total MP scores and the short diameter of the greatest nodes. Conclusion: MP is thought to be associated with abdominal and other system malignancies so MP may be a paraneoplastic syndrome in some patients.