Alexander Houdijk

Dr. Alexander Houdijk


Research Focus & Metrics

Academic Career Length

21Years (2006-Present)

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

Representative Publications

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11 April 2006 in BMC Surgery
Verified
Journal Article
Open access
MBMarc Gh Besselink
Marc Gh Besselink
HSHjalmar C van Santvoort
Hjalmar C van Santvoort
VNVincent B Nieuwenhuijs
Vincent B Nieuwenhuijs
MBMarja A. Boermeester
Marja A. Boermeester
TBThomas L Bollen
Thomas L Bollen
MGmembers of the Dutch Acute Pancreatitis Study Group
members of the Dutch Acute Pancreatitis Study Group
Background: The initial treatment of acute necrotizing pancreatitis is conservative. Intervention is indicated in patients with (suspected) infected necrotizing pancreatitis. In the Netherlands, the standard intervention is necrosectomy by laparotomy followed by continuous postoperative lavage (CPL). In recent years several minimally invasive strategies have been introduced. So far, these strategies have never been compared in a randomised controlled trial. The PANTER study (PAncreatitis, Necrosectomy versus sTEp up appRoach) was conceived to yield the evidence needed for a considered policy decision. Methods/design: 88 patients with (suspected) infected necrotizing pancreatitis will be randomly allocated to either group A) minimally invasive 'step-up approach' starting with drainage followed, if necessary, by videoscopic assisted retroperitoneal debridement (VARD) or group B) maximal necrosectomy by laparotomy. Both procedures are followed by CPL. Patients will be recruited from 20 hospitals, including all Dutch university medical centres, over a 3-year period. The primary endpoint is the proportion of patients suffering from postoperative major morbidity and mortality. Secondary endpoints are complications, new onset sepsis, length of hospital and intensive care stay, quality of life and total (direct and indirect) costs. To demonstrate that the 'step-up approach' can reduce the major morbidity and mortality rate from 45 to 16%, with 80% power at 5% alpha, a total sample size of 88 patients was calculated. Discussion: The PANTER-study is a randomised controlled trial that will provide evidence on the merits of a minimally invasive 'step-up approach' in patients with (suspected) infected necrotizing pancreatitis.

7 March 2013 in Colorectal Disease
Verified
Journal Article
Open access
PDF file
HCH. Cakir
H. Cakir
MSM. F. M. van Stijn
M. F. M. van Stijn
ACA. M. F. Lopes Cardozo
A. M. F. Lopes Cardozo
BLB. L. A. M. Langenhorst
B. L. A. M. Langenhorst
WSW. H. Schreurs
W. H. Schreurs
AHAlexander Houdijk
Alexander Houdijk
Aim: The Enhanced Recovery After Surgery (ERAS) programme is a multimodal approach to improve peri‐operative care in colon surgery. The aim of this study was to report on the adherence to and outcomes of ERAS in the first years after implementation.Method: Data of patients undergoing elective colon resections for malignancy in 2006 until 2010 were compared with patients receiving conventional care in 2005. Retrospective analysis was performed including length of stay (LOS), protocol adherence and complications. The predictive values of ERAS items and baseline characteristics on LOS and complications were analysed using univariate and multivariate analysis.Results: Length of stay (LOS) was significantly shorter in 2006 and 2007 (P ≤ 0.009 and P ≤ 0.004) but not in 2008 and 2009. The mean adherence rate to the ERAS items was 84.1% in 2006 and 2007 and 72.4% in 2008 and 2009 (P < 0.001). In 2005, 2008 and 2009 LOS was significantly shorter for laparoscopically operated patients than for patients with open resections (P < 0.002, P < 0.001 and P < 0.004 respectively). Multivariate analysis showed that age, laparoscopic surgery, removal of nasogastric tube before extubation, mobilization within 24 h after surgery, starting nonsteroidal anti‐inflammatory drugs at day 1 and removal of thoracic epidural analgesia at day 2 were independent predictors of LOS.Conclusion: Strict adherence to the ERAS protocol was associated with reduced LOS and improved outcome in elective colon surgery for malignancy. These benefits were lost when protocol adherence was lower. Embedding the ERAS protocol into an organization and repetitive education are vital to sustain its beneficial effects on LOS and outcome.

7 October 2013 in Journal of Neuroinflammation
Verified
Journal Article
Open access
PDF file
DWDunja Westhoff
Dunja Westhoff
JWJoost Witlox
Joost Witlox
Leo KoendermanLeo Koenderman
Leo Koenderman
KKKees J Kalisvaart
Kees J Kalisvaart
JJJos F M de Jonghe
Jos F M de Jonghe
WGWillem A van Gool
Willem A van Gool
Aging and neurodegenerative disease predispose to delirium and are both associated with increased activity of the innate immune system resulting in an imbalance between pro- and anti-inflammatory mediators in the brain. We examined whether hip fracture patients who develop postoperative delirium have altered levels of inflammatory mediators in cerebrospinal fluid (CSF) prior to surgery.

14 March 2015 in International Journal of Colorectal Disease
Verified
Journal Article
Closed access
PDF file
HCHamit Cakir
Hamit Cakir
CHColin Heus
Colin Heus
TPTjeerd J. van der Ploeg
Tjeerd J. van der Ploeg
AHAlexander Houdijk
Alexander Houdijk

1 May 2015 in Surgery
Verified
Journal Article
Closed access
HCHamit Cakir
Hamit Cakir
CHColin Heus
Colin Heus
WVWouter M. Verduin
Wouter M. Verduin
ALArjen Lak
Arjen Lak
HDHieronymus J. Doodeman
Hieronymus J. Doodeman
AHAlexander Houdijk
Alexander Houdijk

1 November 2016 in The Journal of nutrition, health and aging
Verified
Journal Article
Open access
PDF file
JWJ. van Wissen
J. van Wissen
MSM.F.M. van Stijn
M.F.M. van Stijn
HDH.J. Doodeman
H.J. Doodeman
AHAlexander Houdijk
Alexander Houdijk
Hip fracture surgery in elderly patients is associated with a poor postoperative outcome and a high mortality. Malnutrition is a frequent problem in elderly patients and may be associated with mortality after hip fracture surgery. The Mini Nutritional Assessment (MNA) is a valuable tool to identify malnourished patients and those at risk for malnutrition. To evaluate the association between the preoperative MNA score and mortality after surgery for hip fractures in elderly patients. Patients with a hip fracture and an indication for surgery were included in our study. This study was part of a randomized trial on the effect of taurine on postoperative outcome in elderly hip fracture patients. The MNA was assessed on admission before surgery. Length of stay, postoperative complications and mortality were documented. The association of the MNA score on postoperative outcome and mortality was analyzed using Cox regression analysis. The one-year survival rate in 226 elderly hip fracture patients was 79%. In-hospital mortality rates and 1-year mortality were 27% and 46% in malnourished patients, 12% and 26% in patients at risk for malnutrition and 7% and 17% in well-nourished patients as assessed by MNA. Preoperative malnutrition measured by the MNA is associated with mortality in elderly hip fracture patients.