Robert Jan Stolker

Prof. Dr. Robert Jan Stolker

orcid

Research Focus & Metrics

Academic Career Length

29Years (1998-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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23 November 2017 in Neurological Research
Verified
Journal Article
Open access
BGB. Y. Gravesteijn
B. Y. Gravesteijn
MKMax Keizer
Max Keizer
AVA. J. P. E. Vincent
A. J. P. E. Vincent
JSJ. W. Schouten
J. W. Schouten
RSRobert Jan Stolker
Robert Jan Stolker
MKMarkus Klimek
Markus Klimek
Objective: To investigate differences in outcomes in patients who underwent surgery for insular glioma using an awake craniotomy (AC) vs. a craniotomy under general anesthesia (GA). Methods: Data from patients treated at our hospital between 2005 and 2015 were analyzed retrospectively. The preoperative, intraoperative, postoperative, and longer term follow-up characteristics and outcomes of patients who underwent surgery for primary insular glioma using either an AC or GA were compared. Results: Of the 52 identified patients, 24 had surgery using an AC and 28 had surgery under GA. The extent of resection was similar for the two anesthesia techniques: the median extent of resection was 61.4% (IQR: 37.8–74.3%) in the WHO grade <4 AC group vs. 50.5% (IQR: 35.0–71.2%) in the grade <4 GA group and 73.4% (IQR: 54.8–87.2%) in the grade 4 AC group vs. 88.6% (IQR: 61.2–93.0%) in the grade 4 GA group. Consistent with literature, there were more early neurological deficits after an AC, while the GA group showed more new late neurological deficits; however, these trends were not significant. Survival was similar between the two groups, with 100% 1- and 2-year survival in the grade <4 groups. Conclusion: Our results showed that the extent of resection, neurological outcomes, and survival were similar using the two anesthesia techniques. Since AC is more challenging for the patient and for his or her caregiver after surgery, this finding has implications for clinical decision-making.

26 July 2013 in World Journal of Surgery
Verified
Journal Article
Closed access
PDF file
TVTabita M. Valentijn
Tabita M. Valentijn
WGWael Galal
Wael Galal
SHSanne E. Hoeks
Sanne E. Hoeks
YGYvette R. van Gestel
Yvette R. van Gestel
HVHence J. Verhagen
Hence J. Verhagen
RSRobert Jan Stolker
Robert Jan Stolker

1 April 2019 in International Journal of Cardiology
Verified
Journal Article
Open access
KMK.H.J.M. Mol
K.H.J.M. Mol
SHSanne Elisabeth Hoeks
Sanne Elisabeth Hoeks
VLV.G.B. Liem
V.G.B. Liem
RSRobert Jan Stolker
Robert Jan Stolker
FLF. van Lier
F. van Lier
Troponin elevations after intermediate-to-high risk noncardiac surgery are common and can predict mortality. However, the prognostic value for early and late major adverse cardiovascular events (MACE) is less well investigated. The authors evaluated the relationship between postoperative troponin release and MACE in the first year after noncardiac surgery. This observational cohort registry comprised data of patients aged ≥60 years undergoing intermediate-to-high risk noncardiac surgery between July 2012 and 2015, at the Erasmus University Medical Center, Rotterdam, the Netherlands. High-sensitivity troponin T was measured on day 1 to 3 after surgery. Peak troponin values were divided into four categories: <14 ng·L-1, 14-49 ng·L-1, 50-149 ng·L-1 and ≥150 ng·L-1. The primary endpoint MACE was defined as the occurrence of myocardial infarction, angina, revascularization therapy or cerebrovascular accident in the first year after surgery. The incidence of MACE and all-cause mortality was calculated using Kaplan-Meier estimates. Cox regression was used to estimate risks for both endpoints. In total, 3085 patients were included for analyses and peak troponin elevation above 14 ng·L-1 was present in 1678 (54.4%) patients. The overall incidence for one-year MACE was 5.8% (3.4%, 6.1%, 10.4% and 40.6% per increasing troponin category) with adjusted HR (95% CI) 1.32 (0.85-2.06), 2.53 (1.42-4.53) and 10.24 (5.91-17.75) for the consecutive increasing categories. One-year mortality occurred in 14.6% and showed a similar stepwise increase with adjusted HR (95% CI) 1.25 (0.98-1.60), 2.39 (1.72-3.32) and 3.79 (2.60-5.54). Our dataset demonstrates a graded relationship between postoperative troponin release and occurrence of MACE in the first year after intermediate-to-high risk noncardiac surgery.

31 January 2020 in Journal of Patient Safety
Verified
Journal Article
Open access
JCJose Andres Calvache
Jose Andres Calvache
EBEdison Benavides
Edison Benavides
SESebastian Echeverry
Sebastian Echeverry
FAFrancisco Agredo
Francisco Agredo
RSRobert Jan Stolker
Robert Jan Stolker
MKMarkus Klimek
Markus Klimek
Objective: The Hospital Survey on Patient Safety Culture (HSPSC) was designed to assess staff views on patient safety and has been translated and validated into several languages and settings. This study developed a Latin American Spanish version of the HSPSC for use in perioperative settings and examines its psychometric properties. Methods: After translation and adjustments, a web-based questionnaire was administered to all health care personnel at operating room in a public university-affiliated hospital in Popayán, Colombia. Descriptive statistics, internal reliability, confirmatory and exploratory factor analysis, and intercorrelations among survey composites were calculated. Results: Confirmatory factor analysis showed inadequate model fit for the original 12-factor structure of the HSPSC. Rather, a 9-factor, 36-item instrument showed acceptable factor loadings, internal consistency, and psychometric properties. Five factors were formed with minor changes. Adjusted factors emerged, like “staffing and work pressure” and “supervisor/manager expectations and actions promoting patient safety,” “organizational learning—continuous improvement,” and “hospital management support for safety,” as well as “repeated errors and perception of safety.” Internal consistency for each remaining composite met or exceeded a Cronbach α value of 0.60. Conclusions: Psychometric analyses provided overall support for 9 of the 12 initial factors of patient safety culture. Our findings suggest that more validation studies need to be conducted before applying safety dimensions from the original HSPSC to perioperative settings only. By providing this initial tool, we hope to stimulate further studies and the patient safety research agenda in this part of the world.

1 September 2013 in Anaesthesia and Intensive Care
Verified
Journal Article
Open access
EBE. J. Barker
E. J. Barker
TVT. M. Valentijn
T. M. Valentijn
KLK. M. Van De Luijtgaarden
K. M. Van De Luijtgaarden
SHS. E. Hoeks
S. E. Hoeks
MVM. T. Voute
M. T. Voute
RSRobert Jan Stolker
Robert Jan Stolker
Previous reports on the prognostic value of diabetes mellitus for cardiac complications after vascular surgery show divergent results, especially in regards to the role of type 2 diabetes as a cardiac risk factor, which remains unclear. The aim of this study was to assess the impact of type 2 diabetes on 30-day cardiac complications after vascular surgery. Patients undergoing elective vascular surgery between 2002 and 2011 were included in this retrospective cohort study. Previous diagnosis of type 1 and 2 diabetes and use of oral glucose-lowering medications and insulin were recorded. Patients with type 1 diabetes were excluded from the analysis. The main outcome parameter was cardiac complications, a composite of cardiovascular death, non-fatal myocardial infarction, congestive heart failure, severe arrhythmia and asymptomatic troponin release within 30 days of surgery. In multivariate analysis, corrections were made for comorbidities, demographics, medication use and surgical risk. Of 1462 patients, 329 (22.5%) patients had type 2 diabetes. Cardiac complications occurred in 155 (13.7%) patients without diabetes and in 68 (20.7%) with type 2 diabetes. In multivariate analysis, type 2 diabetes was associated with a significantly increased risk of 30-day cardiac complications (odds ratio 1.80; 95% confidence interval 1.25 to 2.60). Results were similar for type 2 diabetes patients managed with (odds ratio 1.84; 95% confidence interval 1.01 to 3.37) and without (odds ratio 1.79; 95% confidence interval 1.19 to 2.70) insulin. Type 2 diabetes is an independent risk factor for cardiac complications after vascular surgery and should be treated as such in preoperative cardiac risk stratification.

2 July 2019 in BMC Anesthesiology
Verified
Journal Article
Open access
PDF file
WDWouter Droog
Wouter Droog
SHSanne Elisabeth Hoeks
Sanne Elisabeth Hoeks
GAG. Peter van Aggelen
G. Peter van Aggelen
DLD-Yin Lin
D-Yin Lin
JCJ. Henk Coert
J. Henk Coert
EGEilish M. Galvin
Eilish M. Galvin
Patient satisfaction is a well-established indicator to evaluate the quality of medical care and there is an increasing support for the use of patient-reported experience measures (PREMs) to evaluate satisfaction. To anesthetize the upper limb for surgery, both general and regional plexus anaesthesia are appropriate techniques. However, the best technique in the anaesthesiologist’s perspective might not necessarily result in the highest patient satisfaction. The aim of this study is to investigate patient satisfaction following general and regional anaesthesia, and to identify areas where anaesthesiologists can focus on improving patient care. Patients scheduled for elective distal upper extremity surgery under either general or regional plexus anaesthesia were prospectively included. On the first postoperative day, patient satisfaction and main reason for dissatisfaction with the anaesthesia technique were investigated during a telephone interview. Of the 243 patients included in the current study, 79.8% report being “fully satisfied” with their anaesthesia technique. 32.1% of the patients who received regional anaesthesia reported not feeling “fully satisfied”. This figure is 5.5% following general anaesthesia. Main reason for dissatisfaction following regional anaesthesia are reported as “insufficient anaesthesia prior to surgery”, and “the discomfort of having a long-lasting insensate extremity postoperatively”. Following regional plexus anaesthesia, a third of the patients are not “fully satisfied”. To optimize patient satisfaction following regional anaesthesia techniques, we advocate stronger focus on patient counselling preoperatively, addressing the issues of block failure and prolonged postoperative sensory and motor block.