Demi van Dalen

Ms. Demi van Dalen

orcid

Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

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

Representative Publications

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1 October 2021 in European Journal of Surgical Oncology
Verified
Journal Article
Open access
SRStijn van Roessel
Stijn van Roessel
ESEline C. Soer
Eline C. Soer
LDLois A. Daamen
Lois A. Daamen
DDDemi van Dalen
Demi van Dalen
ASArantza Fariña Sarasqueta
Arantza Fariña Sarasqueta
MBMarc G. Besselink
Marc G. Besselink
Whereas neoadjuvant chemo(radio)therapy is increasingly used in pancreatic cancer, it is currently not recommended for other periampullary (non-pancreatic) cancers. This has important implications for the relevance of the preoperative diagnosis for pancreatoduodenectomy. This retrospective multicentre cohort study aimed to determine the frequency of clinically relevant misdiagnoses in patients undergoing pancreatoduodenectomy for pancreatic or other periampullary cancer. Data from all consecutive patients who underwent a pancreatoduodenectomy between 2014 and 2018 were obtained from the prospective Dutch Pancreatic Cancer Audit. The preoperative diagnosis as concluded by the multidisciplinary team (MDT) meeting was compared with the final postoperative diagnosis at pathology to determine the rate of clinically relevant misdiagnosis (defined as missed pancreatic cancer or incorrect diagnosis of pancreatic cancer). In total, 1244 patients underwent pancreatoduodenectomy of whom 203 (16%) had a clinically relevant misdiagnosis preoperatively. Of all patients with a final diagnosis of pancreatic cancer, 13% (87/679) were preoperatively misdiagnosed as distal cholangiocarcinoma (n = 41, 6.0%), ampullary cancer (n = 27, 4.0%) duodenal cancer (n = 16, 2.4%), or other (n = 3, 0.4%). Of all patients with a final diagnosis of periampullary (non-pancreatic) cancer, 21% (116/565) were preoperatively incorrectly diagnosed as pancreatic cancer. Accuracy of preoperative diagnosis was 84% for pancreatic cancer, 71% for distal cholangiocarcinoma, 73% for ampullary cancer and 73% for duodenal cancer. A prediction model for the preoperative likelihood of pancreatic cancer (versus other periampullary cancer) prior to pancreatoduodenectomy demonstrated an AUC of 0.88. This retrospective multicentre cohort study showed that 16% of patients have a clinically relevant misdiagnosis that could result in either missing the opportunity of neoadjuvant chemotherapy in patients with pancreatic cancer or inappropriate administration of neoadjuvant chemotherapy in patients with non-pancreatic periampullary cancer. A preoperative prediction model is available on www.pancreascalculator.com.

25 July 2023 in Frontiers in Digital Health
Verified
Journal Article
Open access
MSMerlijn Smits
Merlijn Smits
DDDemi van Dalen
Demi van Dalen
DPDanny Popping
Danny Popping
RBRené Bleeker
René Bleeker
MSMartijn W. J. Stommel
Martijn W. J. Stommel
HGHarry van Goor
Harry van Goor
Introduction: Accelerated by the coronavirus pandemic, the healthcare landscape is rapidly evolving, with a shift towards hybrid care models combining in-person and online care. To support this shift, the Radboudumc, an academic hospital in the Netherlands, decided to redesign an existing space facilitating the conduction of video consultations.Method: The design process involved participation of end-users to ensure that the physical space met their needs. The look and feel of the area was based on evidence-based design guidelines. Two prototype setups were built and tested, and the feedback informed the final design of the Garden Room.Results: Identified end-user needs were divided into 3 major categories entailing consultation room setup, optimal use of technology and practical issues involving room availability. Combined with the look and feel of the hospital, final design requirements were developed. The Garden Room consists of 18 video consultation rooms, 4 shared workspaces, relaxation area with kitchen, and meeting rooms. Specific attention is given to the ergonomics, technology and privacy in the rooms to facilitate optimal video conversations between patients and healthcare providers. In the Garden Room, natural elements and an open design supports working in a healing environment.Discussion: Next challenge will be optimizing the use of the Garden Room, which may be hindered by various barriers like resistance to change, existing work processes, and lack of skills training. To address these barriers and support use of the Garden Room, the hospital should focus on the implementation of education, changes in work processes, and the presence of advocates for telehealth.

27 March 2024 in Journal of Medical Internet Research
Verified
Journal Article
Open access
SBStefanie C van Den Bosch
Stefanie C van Den Bosch
DDDemi van Dalen
Demi van Dalen
MMMarjan Meinders
Marjan Meinders
HGHarry van Goor
Harry van Goor
SBStefaan Bergé
Stefaan Bergé
SDSandra van Dulmen
Sandra van Dulmen
Background: During the first lockdown of the COVID-19 pandemic, an exponential increase in video consultations replacing in-person outpatient visits was observed in hospitals. Insight into patients’ experiences with this type of consultation is helpful for a broad, sustainable, and patient-centered implementation of video consultation. Objective: This study aims to examine patients’ experiences with video consultation during the COVID-19 pandemic and identify discriminative patient and consultation characteristics to determine when video consultation is most feasible. Methods: A cross-sectional survey study was conducted. Patients aged ≥18 years and scheduled for a video consultation at the outpatient clinic of a Dutch university medical center from August 2020 to December 2020 for all medical specialties were eligible. Patients’ experiences were explored through a study-specific survey using descriptive quantitative statistics. Open-ended questions were qualitatively analyzed and thematically categorized into appreciated aspects and aspects for improvement. Discriminative patient and consultation characteristics were identified using 3 distinctive survey items. Characteristics of patients who scored and those who did not score all 3 items positively were analyzed using binary logistic regression. Results: A total of 1054 patients were included in the analysis. Most patients (964/1054, 91.46%) were satisfied with their video consultation, with a mean overall grade of 8.6 (SD 1.3) of 10. In the qualitative analyses, 70.02% (738/1054) of the patients cited aspects they appreciated and 44.97% (474/1054) mentioned aspects for improvement during their consultation. Patients with better self-rated health reported a positive evaluation significantly more often (P=.001), which also held true for other medical specialties (vs surgical and nonsurgical specialties; P<.001). Conclusions: Video consultation was perceived as highly satisfactory by patients during the COVID-19 pandemic, with the best experience reported by healthy participants and those undergoing their first consultation. Appreciated aspects are mainly at the individual professional level, organizational level, and innovation level itself. The aspects that were mentioned for improvement can be changed for the better.

9 October 2025 in BMJ Open Quality
Verified
Journal Article
Open access
PDF file
DDDemi van Dalen
Demi van Dalen
EAEddy Adang
Eddy Adang
HGHarry van Goor
Harry van Goor
MSMartijn Wj Stommel
Martijn Wj Stommel
Background: Healthcare systems face excessive pressure on sustainability due to financial, social and environmental concerns. Video visits offer an appreciated alternative for routine in-person visits in surgical subspecialties, with the potential to lower costs among hospitals and patients and carbon footprint. However, a comprehensive understanding of patients’ and companions’ costs to attend an outpatient clinic visit remains understudied. The study aims to provide insight into direct and indirect patient costs of a tertiary surgical outpatient clinic visit. Methods: A cross-sectional survey study was conducted among adult patients scheduled for a tertiary outpatient surgery clinic visit from September 2020 to September 2021. The cost of a surgical visit was assessed using a study-specific questionnaire. Visit costs between subspecialties and visit modalities were compared with generalised linear modelling. Results: Of the 961 included surgical patients (866 in-person and 95 video visits), those who received a video visit experienced a substantial halving of visit-related costs (€67 vs €172; β=−103.65, p<0.001) and reduction in costs with increasing age (β=−1.52, p=<0.001), attributable to decreased absenteeism from work for patients and companions, and the absence of travel expenses. Conclusion: Direct and indirect costs among patients and relatives for a visit to a tertiary surgical outpatient clinic are high. Reporting previously neglected, yet significant costs, including those borne by companions, could enhance awareness among clinicians and policymakers regarding the financial and societal impact of offering certain visit modalities and may influence the shared decision-making process.

16 May 2023 in JMIR Preprints
Verified
Preprint
Open access
SBStefanie C van Den Bosch
Stefanie C van Den Bosch
DDDemi van Dalen
Demi van Dalen
MMMarjan Meinders
Marjan Meinders
HGHarry van Goor
Harry van Goor
SBStefaan Bergé
Stefaan Bergé
SDSandra van Dulmen
Sandra van Dulmen
BACKGROUND During the first lockdown of the COVID-19 pandemic, an exponential increase in video consultations replacing in-person outpatient visits was observed in hospitals. Insight into patients’ experiences with this type of consultation is helpful for a broad, sustainable, and patient-centered implementation of video consultation. OBJECTIVE This study aims to examine patients’ experiences with video consultation during the COVID-19 pandemic and identify discriminative patient and consultation characteristics to determine when video consultation is most feasible. METHODS A cross-sectional survey study was conducted. Patients aged ≥18 years and scheduled for a video consultation at the outpatient clinic of a Dutch university medical center from August 2020 to December 2020 for all medical specialties were eligible. Patients’ experiences were explored through a study-specific survey using descriptive quantitative statistics. Open-ended questions were qualitatively analyzed and thematically categorized into appreciated aspects and aspects for improvement. Discriminative patient and consultation characteristics were identified using 3 distinctive survey items. Characteristics of patients who scored and those who did not score all 3 items positively were analyzed using binary logistic regression. RESULTS A total of 1054 patients were included in the analysis. Most patients (964/1054, 91.46%) were satisfied with their video consultation, with a mean overall grade of 8.6 (SD 1.3) of 10. In the qualitative analyses, 70.02% (738/1054) of the patients cited aspects they appreciated and 44.97% (474/1054) mentioned aspects for improvement during their consultation. Patients with better self-rated health reported a positive evaluation significantly more often (P=.001), which also held true for other medical specialties (vs surgical and nonsurgical specialties; P<.001). CONCLUSIONS Video consultation was perceived as highly satisfactory by patients during the COVID-19 pandemic, with the best experience reported by healthy participants and those undergoing their first consultation. Appreciated aspects are mainly at the individual professional level, organizational level, and innovation level itself. The aspects that were mentioned for improvement can be changed for the better.