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Differences in abdominal force between conventional and single port laparoscopy

Sun, S. (author), Dankelman, J. (author), Horeman, T. (author)

In laparoendoscopic single-site surgery (LESS), only one single incision is used to introduce all instruments into the abdominal cavity. The introduction of multi-channel single-port devices enabled insertion of laparoscopic instruments and laparoscope through one single entry point instead of multiple entry points in conventional laparoscopic...

conference paper 2013

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Towards safer laparoscopic surgery: Training and assessment of surgical skills and equipment handling

Van Hove, P.D. (author)

The objective of this thesis is to improve laparoscopic surgical skills training and assessment with an emphasis on equipment-related safety and competence. A comparison was made between a hospital and a petrochemical company and showed that employees at the petrochemical company were trained and certified in equipment handling much more...

doctoral thesis 2013

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Technical development of common anesthesiology techniques; Neuraxial anesthesia and laryngoscopy for endotracheal intubation

Lee, R.A. (author)

doctoral thesis 2013

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Comparison of mechanical properties of silicone and PVC (polyvinylchloride) cosmetic gloves for articulating hand prostheses

Smit, G. (author), Plettenburg, D.H. (author)

Current articulating electric and body-powered hands have a lower pinch force (15–34 N) than electric hands with stiff fingers (55–100 N). The cosmetic glove, which covers a hand prosthesis, negatively affects the mechanical efficiency of a prosthesis. The goal of this study is to mechanically compare polyvinylchloride (PVC) and silicone...

journal article 2013

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Sustained release of BMP-2 in bioprinted alginate for osteogenicity in mice and rats

Poldervaart, M.T. (author), Wang, H. (author), Van der Stok, J. (author), Weinans, H.H. (author), Leeuwenburgh, S.C.G. (author), Cumhur Öner, F. (author), Dhert, W.J.A. (author), Alblas, J. (author)

The design of bioactive three-dimensional (3D) scaffolds is a major focus in bone tissue engineering. Incorporation of growth factors into bioprinted scaffolds offers many new possibilities regarding both biological and architectural properties of the scaffolds. This study investigates whether the sustained release of bone morphogenetic protein...

journal article 2013

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Enhanced Bone Regeneration of Cortical Segmental Bone Defects Using Porous Titanium Scaffolds Incorporated with Colloidal Gelatin Gels for Timeand Dose-Controlled Delivery of Dual Growth Factors

Van der Stok, J. (author), Wang, H. (author), Yavari, S.A. (author), Siebelt, M. (author), Sandker, M. (author), Waarsing, J.H. (author), Verhaar, J.A.N. (author), Jahr, H. (author), Zadpoor, A.A. (author), Leeuwenburgh, S.C.G. (author), Weinans, H. (author)

Porous titanium scaffolds are a promising class of biomaterials for grafting large bone defects, because titanium provides sufficient mechanical support, whereas its porous structure allows bone ingrowth resulting in good osseointegration. To reinforce porous titanium scaffolds with biological cues that enhance and continue bone regeneration,...

journal article 2013

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Adaptive multi-dimensional data decomposition

Lenseigne, B.A.J. (author), Van Breda, E.C.C. (author), Jonker, P.P. (author)

A method of decomposing an image or video into a plurality of components. The method comprises: obtaining (10) an intensity signal of the image or video; and decomposing (30) the intensity signal into a component representing the three-dimensional structure shape of one or more objects in the scene and at least one other component. Also provided...

patent 2013

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Differentiation between non-neural and neural contributors to ankle joint stiffness in cerebral palsy

De Gooijer-van de Groep, K.L. (author), De Vlugt, E. (author), De Groot, J.H. (author), Van der Heijden-Maessen, H.C.M. (author), Wielheesen, D.H.M. (author), Van Wijlen-Hempel, R.M.S. (author), Arendzen, J.H. (author), Meskers, C.G.M. (author)

Background Spastic paresis in cerebral palsy (CP) is characterized by increased joint stiffness that may be of neural origin, i.e. improper muscle activation caused by e.g. hyperreflexia or non-neural origin, i.e. altered tissue viscoelastic properties (clinically: “spasticity” vs. “contracture”). Differentiation between these components is hard...

journal article 2013

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Making function modeling practically usable

Tomiyama, T. (author), Van Beek, T. (author), Alvarez Cabrera, A.A. (author), Komoto, H. (author), D'Amelio, V. (author)

journal article 2013

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Why selective publication of statistically significant results can be effective

De Winter, J.C.F. (author), Happee, R. (author)

Concerns exist within the medical and psychological sciences that many published research findings are not replicable. Guidelines accordingly recommend that the file drawer effect should be eliminated and that statistical significance should not be a criterion in the decision to submit and publish scientific results. By means of a simulation...

journal article 2013

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Natural grasping, design and evaluation of a voluntary closing adaptive hand prosthesis

Smit, G. (author)

Replacement of a missing hand by an artificial alternative remains one of the biggest challenges in rehabilitation. Although many different terminal devices are available, around 27% of the amputees does not actively use their device and 20% totally refrains from wearing it. There are various reasons for prosthesis abandonment, e.g. wearing...

doctoral thesis 2013

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The effect of directional inertias added to pelvis and ankle on gait

Meuleman, J.H. (author), Van Asseldonk, E.H.F. (author), Van der Kooij, H. (author)

Background Gait training robots should display a minimum added inertia in order to allow normal walking. The effect of inertias in specific directions is yet unknown. We set up two experiments to assess the effect of inertia in anteroposterior (AP) direction to the ankle and AP and mediolateral (ML) direction to the pelvis. Methods We developed...

journal article 2013

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Identifying intrinsic and reflexive contributions to low-back stabilization

Van Drunen, P. (author), Maaswinkel, E. (author), Van der Helm, F.C.T. (author), Van Dieën, J.H. (author), Happee, R. (author)

Motor control deficits have been suggested as potential cause and/or effect of a-specific chronic low-back pain and its recurrent behavior. Therefore, the goal of this study is to identify motor control in low-back stabilization by simultaneously quantifying the intrinsic and reflexive contributions. Upper body sway was evoked using continuous...

journal article 2013

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Statische houdingen tijdens levende-nierdonaties: De handgeassisteerde versus de laparoscopische aanpak

Wauben, L.S.G.L. (author), Albayrak, A. (author), Dols, N. (author), Goossens, R.H.M. (author), IJzermans, J. (author)

In 2010 ontvingen 865 Nederlanders die lijden aan chronisch nierfalen een nieuwe nier. Maar er wachten nog steeds 892 patiënten op een donornier en ongeveer 1275 dialysepatiënten sterven elk jaar. Levende-nierdonatie lijkt een geschikte optie om het donortekort te verminderen. Hierbij staat een ‘gezond’ familielid (maar soms ook een anonieme...

journal article 2013

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Integration of Sensory Force Feedback Is Disturbed in CRPS-Related Dystonia

Mugge, W. (author), Van der Helm, F.C.T. (author), Schouten, A.C. (author)

Complex regional pain syndrome (CRPS) is characterized by pain and disturbed blood flow, temperature regulation and motor control. Approximately 25% of cases develop fixed dystonia. The origin of this movement disorder is poorly understood, although recent insights suggest involvement of disturbed force feedback. Assessment of sensorimotor...

journal article 2013

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Dora will watch over you

Wassink, J. (author)

A black box, but then in the operating room. Meet the digital surgical assistant Dora. TU Delft is developing the system together with hospitals and businesses in the province of Zuid-Holland. “We can learn a lot from aviation.”

journal article 2013

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Identification of the contribution of the ankle and hip joints to multi-segmental balance control

Boonstra, T.A. (author), Schouten, A.C. (author), Van der Kooij, H. (author)

Background Human stance involves multiple segments, including the legs and trunk, and requires coordinated actions of both. A novel method was developed that reliably estimates the contribution of the left and right leg (i.e., the ankle and hip joints) to the balance control of individual subjects. Methods The method was evaluated using...

journal article 2013

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Variability in bimanual wheelchair propulsion: Consistency of two instrumented wheels during handrim wheelchair propulsion on a motor driven treadmill

Vegter, R.J.K. (author), Lamoth, C.J. (author), De Groot, S. (author), Veeger, H.E.J. (author), Van der Woude, L.H.V. (author)

Background Handrim wheelchair propulsion is a complex bimanual motor task. The bimanually applied forces on the rims determine the speed and direction of locomotion. Measurements of forces and torques on the handrim are important to study status and change of propulsion technique (and consequently mechanical strain) due to processes of learning,...

journal article 2013

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Selective control of gait subtasks in robotic gait training: Foot clearance support in stroke survivors with a powered exoskeleton

Koopman, B. (author), Van Asseldonk, E.H.F. (author), Van der Kooij, H. (author)

Background Robot-aided gait training is an emerging clinical tool for gait rehabilitation of neurological patients. This paper deals with a novel method of offering gait assistance, using an impedance controlled exoskeleton (LOPES). The provided assistance is based on a recent finding that, in the control of walking, different modules can be...

journal article 2013

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Robotic Bipedal Running: Increasing disturbance rejection

Karssen, J.G.D. (author)

The goal of the research presented in this thesis is to increase the understanding of the human running gait. The understanding of the human running gait is essential for the development of devices, such as prostheses and orthoses, that enable disabled people to run or that enable able people to increase their running performance. Although these...

doctoral thesis 2013