scholarly journals Clinical Application of a Modified Bone Cement Pusher in Percutaneous Vertebroplasty Combined with Multi-Target Negative Pressure Rotary-Cutting Technique in Puncture Biopsy for Bone Tumors

2022 ◽  
Author(s):  
Zongqiang Yang ◽  
Jing Tang ◽  
Hongbao Ma ◽  
Linan Wang ◽  
Jiandang Shi ◽  
...  
Keyword(s):  
Bone Cement ◽  
Negative Pressure ◽  
New Device ◽  
Puncture Biopsy ◽  
Biopsy Device ◽  
Positive Rate ◽  
Group A ◽  
Rotary Cutting ◽  
Group B ◽  
Consistency Rate

Abstract Purpose To assess the efficiency and safety of a modified bone cement pusher in percutaneous vertebroplasty (PVP) combined with a multi-target negative pressure rotary-cutting technique in puncture biopsy of bone tumors. Methods The biopsy performed with the modified bone cement pusher commonly used in PVP, and a multi-target negative pressure rotary-cutting technique. A total of 120 patients with spinal and pelvic tumors undergoing needle biopsy in our department were recruited and assigned to new biopsy device group (group A, n=60) or and conventional biopsy device group (group B, n=60). The puncture time, positive rate, consistency rate, and dependence rate between group A and B were compared to assess the efficiency and safety of the new device. Results No biopsy-related complications were reported in both groups. The puncture time (39.44±8.885 min vs. 61.61±9.880 min), positive rate (96.67% vs. 61.67%), consistency rate (96.55% vs. 81.8%), and dependence rate (100% vs. 83.33%) were significantly superb in group A compared with those in group B (all P<0.05). Patients in group A did not require repeated biopsies, and sufficient samples were obtained through the needle trajectory in PVP. All patients with a definite diagnosis were managed with appropriate treatments. Conclusions Featuring high safety, positive rate and consistency rate, the new device can be performed to collect sufficient pathological samples from multiple angles. Wide clinical replication can be expected considering its evident diagnostic efficiency for bone tumor.

scholarly journals Influence of bone cement distribution on outcomes following percutaneous vertebroplasty: a retrospective matched-cohort study

2021 ◽  
Vol 49 (7) ◽  
pp. 030006052110222
Author(s):  
Ling Mo ◽  
Zixian Wu ◽  
De Liang ◽  
Linqiang Y ◽  
Zhuoyan Cai ◽  
...  
Keyword(s):  
Cohort Study ◽  
Bone Cement ◽  
Percutaneous Vertebroplasty ◽  
Vertebral Compression Fractures ◽  
Matched Cohort ◽  
Matched Cohort Study ◽  
Cement Distribution ◽  
Group A ◽  
Group B

Objective To evaluate the influence of insufficient bone cement distribution on outcomes following percutaneous vertebroplasty (PVP). Methods This retrospective matched-cohort study included patients 50–90 years of age who had undergone PVP for single level vertebral compression fractures (VCFs) from February 2015 to December 2018. Insufficient (Group A)/sufficient (Group B) distribution of bone cement in the fracture area was assessed from pre- and post-operative computed tomography (CT) images. Assessments were before, 3-days post-procedure, and at the last follow-up visit (≥12 months). Result Of the 270 eligible patients, there were 54 matched pairs. On post-operative day 3 and at the last follow-up visit, significantly greater visual analogue scale (VAS) pain scores and Oswestry Disability Index (ODI) scores were obtained in Group B over Group A, while kyphotic angles (KAs) and vertebral height (VH) loss were significantly larger in Group A compared with Group B. Incidence of asymptomatic cement leakage and re-collapse of cemented vertebrae were also greater in Group A compared with Group B. Conclusions Insufficient cement distribution may relate to less pain relief and result in progressive vertebral collapse and kyphotic deformity post-PVP.

Comparative study between Negative Pressure Wound Therapy (NPWT) and Standard Moist Wound Dressing (SMWD) in management of diabetic non ischemic foot ulcers

QJM ◽  
2020 ◽  
Vol 113 (Supplement_1) ◽  
Author(s):  
A M Kamal ◽  
A N Kamel ◽  
S M Elsayed
Keyword(s):  
Negative Pressure ◽  
Diabetic Foot ◽  
Negative Pressure Wound Therapy ◽  
Foot Ulcers ◽  
Diabetic Foot Ulcers ◽  
Wound Therapy ◽  
Significant Difference ◽  
Group A ◽  
Group B

Abstract Background and Aims Diabetes is rapidly increasing in prevalence worldwide and surgery in patients with diabetic foot is becoming more common. Foot complications are a major cause of admissions in diabetic patients, and comprise a disproportionately high number of hospital days because of multiple surgical procedures and prolonged length of stay in hospital. Diabetic foot is an umbrella term for foot problems in patients with diabetes mellitus. Foot disorders such as ulceration, infection and gangrene are the most common, complex and costly sequelae of diabetes mellitus. The optimal therapy for diabetic foot ulcers remains ill-defined. Saline-moistened gauze has been the standard method; however, it has been difficult to continuously maintain a moist wound environment with these dressings. This has led to the development of various hydrocolloid wound gels, which provided more consistent moisture retention. Refinements in topical ointments have resulted in the addition of various pharmacological agents including growth factors and enzymatic debridement compounds. Hyperbaric oxygen therapy and culture skin substitutes are other wound therapies that have been advocated. All these therapies are associated with significant expense and are being utilized in some situations without sufficient scientific evidence demonstrating their efficacy. Therefore, the search for an efficacious, convenient and cost-effective therapy continues. Negative Pressure Wound Therapy (NPWT) is a newer noninvasive adjunctive therapy system that uses controlled negative pressure using Vacuum-Assisted Closure device (VAC) to help promote wound healing by removing fluid from open wounds through a sealed dressing and tubing which is connected to a collection container. The use of sub-atmospheric pressure dressings, available commercially as a VAC device, has been shown to be an effective way to accelerate healing of various wounds. This was aimed to compare wound outcome, limb salvage, and cost effectiveness between Negative pressure wound therapy (NPWT) and Standard moist wound therapy (SMWT) in management of diabetic non ischemic foot ulcers. Methods we performed a cohort study involving 30 patients with active diabetic foot ulcers, in a high volume tertiary referral vascular center. They were divided into 2 groups: 15 patients (group A) were prescribed NPWT and the other 15 patients (group B) received SMWD. During follow up visits, progress of healing was evaluated and documented in the form of change in wound diameter, depth, up or down scaling along UTWC, wound status at 2, 4, 8, and 12 weeks and 4 weekly thereafter till complete epithelialization. Results As regard to ulcer depth there were statistically significant difference between the 2 groups during follow up duration of the study after 4 weeks with group A showing faster decrease in ulcer depth than group B denoting faster formation of granulation tissue. As regard to complete granulation of ulcer there were statistically significant difference between the 2 groups during follow up duration of the study markedly shown after 6 weeks with group A showing complete ulcer granulation faster than group B, with statistically significant difference as regard to number of days on dressing and follow up duration in weeks between the 2 groups with group A showing lesser number of days on dressing and shorter follow up duration in weeks than group B. Conclusion NPWT has a definitive role in promotion of proliferation of granulation tissue, reduction in the wound size, by and rapid clearing of bacterial load. Our data demonstrates that negative pressure wound dressings decrease the wound size more effectively than saline gauze dressings over the first 4 weeks of therapy. It is suggested that NPWT is a cost-effective, easy to use and patient-friendly method of treating diabetic foot ulcers which helps in early closure of wounds, preventing complications and hence promising a better outcome.

scholarly journals A Radiographic Study of Biomechanical Relationship between the Achilles Tendon and Plantar Fascia

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Genrui Zhu ◽  
Zhifeng Wang ◽  
Chengjie Yuan ◽  
Xiang Geng ◽  
Chao Zhang ◽  
...  
Keyword(s):  
Achilles Tendon ◽  
Plantar Fascia ◽  
Lateral Ankle ◽  
Posterior Side ◽  
Negative Results ◽  
Significant Difference ◽  
Positive Rate ◽  
Group A ◽  
Achilles Tendonitis ◽  
Group B

Background. Previously, scholars have concluded that the Achilles tendon and the plantar fascia were closely biomechanically related, although there is little clinical evidence of the relationship between the two. To investigate the biomechanical relationship between the Achilles tendon and the plantar fascia, the author used standing lateral ankle radiographs of patients with insertional Achilles tendonitis to determine the biomechanical relationship between the Achilles tendon and plantar fascia. Methods. The author collected standing lateral ankle radiographs from patients with insertional Achilles tendonitis who accepted surgical treatment in the author’s hospital from March 2009 to July 2018. According to whether there were bone spurs on the posterior side of the calcaneus, patients were divided into group A (spur present on the posterior side) and group B (spur not present on the posterior side). The positive rates of spurs on the plantar side of the calcaneus were determined in group A and group B. The chi-square test was used to compare the measurement results between the two groups. Results. In group A, 13 heels were positive for calcaneal bone spurs, and the positive rate was 65.0%. In group B, 3 heels were positive for plantar calcaneal spurs, and the positive rate was 12%. Among all 16 patients with positive plantar calcaneal spurs, 13 had posterior calcaneal spurs (accounting for 81.3%), and 3 had negative results, accounting for 18.7%. There was a significant difference between the results in groups A and B (P<0.05). Conclusion. There is a relationship between posterior calcaneal spurs and plantar calcaneal spurs in patients with insertional Achilles tendonitis, which can be inferred as resulting from the increasing tension in the biomechanically complex relationship between the Achilles tendon and the plantar fascia.

scholarly journals Evaluation of Airway Scope at Improving the Success Rate of the First Intubation Attempt by Nonexpert Physicians: A Randomized Crossover Manikin Study

2012 ◽  
Vol 2012 ◽  
pp. 1-5
Author(s):  
Haruyuki Yuasa ◽  
Hiroyuki Yokoyama ◽  
Naohiro Yonemoto ◽  
Yoichiro Kasahara ◽  
Hiroshi Nonogi
Keyword(s):  
Success Rate ◽  
Dental Trauma ◽  
Secondary Outcome ◽  
Intubation Attempt ◽  
New Device ◽  
Emergency Situations ◽  
Airway Scope ◽  
Intubation Success Rate ◽  
Group A ◽  
Group B

Purpose. The aim of the study was to assess the performance of Airway Scope (AWS) on the first attempt at intubation in manikins by nonexpert physicians. Methods. A randomized crossover trial involving seven scenarios. Participants: residents of a cardiovascular hospital. In group A, the AWS procedure was performed first followed by Machintouch Laryngoscopy (ML), while in group B the ML procedure was performed first and then the AWS. The primary outcome assessed was the success of first intubation attempt in a normal scenario. The secondary outcome assessments were success in six other scenarios, and also elapsed time and dental trauma caused in all scenarios. Results. There were 34 participants. All AWS-assisted intubations were successfully completed, but one ML-assisted intubation failed in the normal scenario (P=0.32). The outcomes achieved by the AWS in scenarios involving cervical immobilization (P=0.03), tongue edema (P≤0.001), pharyngeal obstruction (P≤0.001), and jaw trismus (P=0.001) were superior to those obtained with the ML. Conclusions. Use of AWS-assisted intubation in manikin scenarios results in a significantly high intubation success rate on the first attempt by nonexpert physicians. These findings suggest this new device will be useful for nonexpert physicians in emergency situations.

scholarly journals Clinical efficacy and safety of bone cement combined with radiofrequency ablation in the treatment of spinal metastases

BMC Neurology ◽  
2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Nanning Lv ◽  
Rui Geng ◽  
Feng Ling ◽  
Zhangzhe Zhou ◽  
Mingming Liu
Keyword(s):  
Radiofrequency Ablation ◽  
Bone Cement ◽  
Recurrence Rate ◽  
Tumor Recurrence ◽  
Spinal Metastases ◽  
Efficacy And Safety ◽  
Significant Difference ◽  
Group A ◽  
Group B ◽  
Tumor Recurrence Rate

Abstract Background To investigate the clinical efficacy and safety of bone cement combined with radiofrequency ablation (RFA) in the treatment of spinal metastases. Methods The medical records of patients with spinal metastatic tumor admitted to our hospital from January 2016 to December 2018 were retrospectively analyzed. Based on different surgical methods, the patients were divided into groups A (treated with RFA combined with bone cement) and B (treated with bone cement only). Group A included 35 patients with 47 segments of diseased vertebral bodies. Group B consisted of 52 patients with 78 vertebral segments. Pain, quality of life score, vertebra height, bone cement leakage, postoperative tumor recurrence, and complications were assessed 3 days and 1 and 6 months after surgery. Results All the patients had smooth operation without paraplegia, spinal cord injury, and perioperative death. Visual analogue scales (VAS) and Oswestry Disability Index (ODI) scores of the two groups significantly improved 3 days and 1 month after surgery compared with those before surgery (P < 0.05), but no significant difference was observed between the two groups (P > 0.05). Six months after surgery, the VAS and ODI scores of patients in group A were lower than those in group B, with statistically significant differences (P < 0.05). The postoperative vertebral body height of the two groups significantly increased compared with that before surgery, and the difference was statistically significant (P < 0.05). Meanwhile, no significant difference was observed between the two groups (P > 0.05). Postoperative bone cement permeability in group A was 6.4%, and postoperative tumor recurrence rate was 11.4%. The permeability of bone cement in group B was 20.5%, and the tumor recurrence rate was 30.8%. The bone cement permeability and tumor recurrence rate in group A were lower than those in group B, with statistically significant differences (P < 0.05). Conclusions Bone cement combined with RFA for the treatment of spinal metastases can achieve good efficacy, desirable analgesic effect, low incidence of complications, small surgical trauma, and high safety. The proposed method has the value of clinical popularization and application.

scholarly journals Early Diagnosis of Helicobacter pylori Infection in Vietnamese Patients with Acute Peptic Ulcer Bleeding: A Prospective Study

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Duc Trong Quach ◽  
Mai Ngoc Luu ◽  
Toru Hiyama ◽  
Thuy-HuongThi To ◽  
Quy Nhuan Bui ◽  
...  
Keyword(s):  
Peptic Ulcer ◽  
Infection Rate ◽  
Ulcer Bleeding ◽  
Peptic Ulcer Bleeding ◽  
Urease Test ◽  
Positive Rate ◽  
Group A ◽  
H Pylori ◽  
Group B ◽  
Noninvasive Tests

Aims. To investigate H. pylori infection rate and evaluate a combined set of tests for H. pylori diagnosis in Vietnamese patients with acute peptic ulcer bleeding (PUD). Methods. Consecutive patients with acute PUB were enrolled prospectively. Rapid urease test (RUT) with 3 biopsies was carried out randomly. Patients without RUT or with negative RUT received urea breath test (UBT) and serological and urinary H. pylori antibody tests. H. pylori was considered positive if RUT or any noninvasive test was positive. Patients were divided into group A (RUT plus noninvasive tests) and group B (only noninvasive tests). Results. The overall H. pylori infection rate was 94.2% (161/171). Groups A and B had no differences in demographic characteristics, bleeding severity, endoscopic findings, and proton pump inhibitor use. H. pylori-positive rate in group A was significantly higher than that in group B (98.2% versus 86.7%, p=0.004). The positive rate of RUT was similar at each biopsy site but significantly increased if RUT results from 2 or 3 sites were combined (p<0.05). Conclusions. H. pylori infection rate in Vietnamese patients with acute PUB is high. RUT is an excellent test if at least 2 biopsies are taken.

scholarly journals Retrospective comparison of negative pressure wound therapy and silver-coated foam dressings in open-wound treatment in cats

2016 ◽  
Vol 19 (6) ◽  
pp. 624-630 ◽  
Author(s):  
Mirja Christine Nolff ◽  
Michael Fehr ◽  
Sven Reese ◽  
Andrea E Meyer-Lindenberg
Keyword(s):  
Negative Pressure ◽  
Negative Pressure Wound Therapy ◽  
Previous Treatment ◽  
Wound Treatment ◽  
Open Wound ◽  
Wound Therapy ◽  
Antiseptic Treatment ◽  
Group A ◽  
Group B ◽  
Open Wound Treatment

Objectives The objective of this study was to evaluate negative pressure wound therapy (NPWT) for the treatment of complicated wounds in cats. Methods Twenty cats undergoing open-wound treatment in two clinics were classed according to treatment method: NPWT (group A, n = 10) and polyurethane foam dressing (group B, n = 10). Pairs of patients from each group were matched based on wound conformation, localisation and underlying cause. Cats from both groups were compared in terms of duration of previous treatment, time to closure and complications. Results Signalment, duration of previous treatment, antibiotic and antiseptic treatment, and bacterial status were comparable between groups. Total time to wound closure was significantly shorter ( P = 0.046, strong effect size; Cohen d = 0.8) in group A (25.8 days, range 11.0–57.0 days) compared with group B (39.5 days, range 28.0–75.0 days). NPWT-treated wounds suffered fewer complications and became septic less frequently during treatment compared with wounds treated with a foam dressing. The progression of fat tissue necrosis was particularly well controlled under NPWT, resulting in fewer deaths due to this condition in this group. However, although a strong effect of NPWT on the progression of infection, fever and sepsis was detected (Cramer-V 0.5), this difference was not significant. Conclusions and relevance This study demonstrated that time to healing was considerably shorter, and complication rate lower, in NPWT-treated animals compared with foam dressing-treated cats. In particular, the effective management of infection by NPWT emphasises the value of NPWT in the treatment of cats suffering from infected wounds.

scholarly journals Effect of Bone Cement Implantation on Haemodynamics in Elderly Patients and Preventive Measure in Cemented Hemiarthroplasty

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Xiangbei Qi ◽  
Yingze Zhang ◽  
Jinshe Pan ◽  
Lijie Ma ◽  
Lin Wang ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Pulmonary Embolism ◽  
Elderly Patients ◽  
Bone Cement ◽  
Statistical Significance ◽  
Preventive Measure ◽  
Effective Measure ◽  
Marrow Cavity ◽  
Group A ◽  
Group B

This study was to investigate the influence of bone cement implantation on haemodynamics and the preventive effect of epinephrine hydrochloride on pulmonary embolism in elderly patients with cemented semihip replacement. 128 patients were retrospectively analyzed. The patients were treated with (group A, 64 cases) or without (group B, 64 cases) epinephrine hydrochloride saline. The monitoring indicators included systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP), heart rate (HR), and pulse oxygen saturation (SPO2). The indicators of the two groups were compared before and 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10 minutes after bone cement implantation. Analysis of variance and SNK-q test were used for the statistical analysis. Blood pressure and SPO2of group B decreased with statistical difference (P<0.05) and HR increased without statistical significance, comparing with those of group A. In group A, SBP, DBP, MAP, HR, and SPO2after bone cement implantation did not change significantly at each time point comparing with before implantation (P>0.05). Bone cement implantation has significant influence on hemodynamics in elderly patients with hemiarthroplasty. Flushing the bone marrow cavity with saline epinephrine hydrochloride is an effective measure to reduce the incidence of bone cement pulmonary embolism.

Negative pressure wound therapy, silver coated foam dressing and conventional bandages in open wound treatment in dogs

2015 ◽  
Vol 28 (01) ◽  
pp. 30-38 ◽  
Author(s):  
M. Fehr ◽  
A. Bolling ◽  
R. Dening ◽  
S. Kramer ◽  
S. Reese ◽  
...  
Keyword(s):  
Negative Pressure ◽  
Negative Pressure Wound Therapy ◽  
Previous Treatment ◽  
Wound Treatment ◽  
Open Wound ◽  
Wound Therapy ◽  
Significant Difference ◽  
Group A ◽  
Group B ◽  
Open Wound Treatment

SummaryObjectives: To evaluate negative pressure wound therapy (NPWT) for treatment of complicated wounds in dogs.Study type: Retrospective multicentre study.Materials and methods: Dogs (n = 50) undergoing open wound treatment were classified according to treatment method used: bandage (Group A, n = 7), NPWT (Group B, n = 18), and foam dressing (Group C, n = 25). Pairs of patients matched based on wound conformation, localization, and underlying cause were compared between Group A and C (n = 7 pairs) and between groups B and C (n = 18 pairs) in terms of duration of previous treatment, time to closure, and complications.Results: Signalment, antibiotic medications, antiseptic treatment, and bacterial status of wounds were comparable between groups. The duration of previous treatment was significantly higher in patients assigned to Group B (p = 0.04) compared to Group C, while no significant difference was found between groups A and B. Total time to wound closure was significantly shorter in Group C compared to Group A (p = 0.02) and in Group B compared to Group C (p = 0.003). Wounds treated with NPWT suffered significantly less complications (p = 0.008) and were significantly less septic during treatment (p = 0.016) than wounds treated with a foam dressing.Conclusion: This study shows that time to healing was halved in NPWT treated patients compared to foam dressing treated patients, which in turn healed faster than patients treated with conventional bandage, underlining the value of NPWT therapy for the treatment of complicated wounds.

scholarly journals Risk Factors for Local Bone Destruction Progression in Palliative Percutaneous Vertebroplasty for Vertebral Metastases and the Significance of Bone Cement Filling Rates

2020 ◽  
Vol 1;24 (1;1) ◽  
pp. E101-E109
Keyword(s):  
Risk Factors ◽  
Bone Cement ◽  
Percutaneous Vertebroplasty ◽  
Bone Destruction ◽  
Vertebral Metastases ◽  
Filling Rate ◽  
Complete Filling ◽  
Local Bone ◽  
Group A ◽  
Group B

BACKGROUND: For palliative percutaneous vertebroplasty (PVP) for vertebral metastases, local bone destruction progression (LBDP) commonly occurs in the previously treated vertebrae. There were no studies regarding LBDP and its risk factors in previous reports, and there was no uniform evaluation method for the distribution of bone cement in the vertebrae. OBJECTIVES: We aimed to investigate the risk factors for LBDP after PVP for palliative treatments in patients with vertebral metastases. We also proposed that filling rates could be used as a simple evaluation method to detect vertebral metastases and explored its clinical significance. STUDY DESIGN: This was a retrospective study. SETTING: A university hospital. METHODS: A total of 48 patients and 54 vertebrae that had received PVP as a palliative treatment for vertebral metastases were recruited between October 2012 to October 2019 from the Shengjing Hospital of the China Medical University. We collected and evaluated the data including age, gender, cement filled completely or not, cement dose used, the cement distribution score, time of LBDP, and so on, and the filing rate we proposed was also included. RESULTS: This retrospective study divided 48 patients and 54 vertebrae into group A for those with an LBDP of less than 6 months (n = 41), and group B for those with an LBDP of 6 or more months (n = 13). The complete filling of bone cement and bone cement dose in group B was much higher than that in group A (2.85 ± 0.97 vs. 4.12 ± 1.77; P = 0.027), and the time of recurrent pain in group B was significantly higher compared with that in group A (8.46 ± 2.73 vs. 3.39 ± 1.63; P < 0.0001). There was a statistical difference in the Saliou score and filling rate between the 2 groups (11.77 ± 3.17 vs. 9.34 ± 3.28, P = 0.023; 0.752 ± 0.227 vs. 0.489 ± 0.161, P < 0.0001). Univariate logistic analysis showed that complete filling of cement, the cement dose, Saliou score, and filling rate were statistically significant predictors of LBDP occurring in less than 6 months. Multivariate logistic analysis showed that the filling rate was an independent predictor of patients with vertebral metastases developing LBDP in less than 6 months (odds ratio, < 0.001; 95% confidence interval, < 0.001–0.006; P = 0.0007). The cutoff value for the filling rate calculated from the receiver operating characteristic (ROC) curve analysis was 0.646, which could identify patients who had LBDP in less than 6 months of PVP with a sensitivity of 85.4% and specificity of 84.6%. The 6-month LBDP in the 0.646 or less ROC curve group was higher than that in the greater than 0.646 ROC curve group (97.22% vs. 55.56%, P < 0.0001). LIMITATIONS: The retrospective nature and small sample size were significant. Variation in the time and state of bone cement injected during all PVP procedures was a bias. There was no pathological diagnosis of all vertebral metastases. CONCLUSIONS: The cement dose, complete filling of cement, Saliou score, and filling rate were factors negatively related to LBDP occurring in less than 6 months. Patients with lower filling rates are maybe more likely to have early LBDP compared with those with higher filling rates. KEY WORDS: Bone cement, distribution of bone cement, local bone destruction progression, percutaneous vertebroplasty, palliative treatment, vertebral metastases

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