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Dive into the research topics where K.J.A.O. Ingels is active.

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Featured researches published by K.J.A.O. Ingels.


Ear and Hearing | 2001

The effect of short-term ventilation tubes versus watchful waiting on hearing in young children with persistent otitis media with effusion: a randomized trial.

M.M. Rovers; Huub Straatman; K.J.A.O. Ingels; G.J. van der Wilt; P. van den Broek; G.A. Zielhuis

Objective To study the effect of short-term ventilation tubes in children aged 1 to 2 yr with screening-detected, bilateral otitis media with effusion (OME) persisting for 4 to 6 mo, as compared with watchful waiting. Design Multi-center randomized controlled trial (N = 187) with two treatment arms: short-term ventilation tubes versus watchful waiting. Young children underwent auditory screening; those with persistent (4 to 6 mo) bilateral OME were recruited. Results The mean duration of effusion over 1-yr follow-up was 142 days (36%) in the ventilation tube (VT) group versus 277 days (70%) in the watchful waiting (WW) group. After 6 mo of follow-up, the pure-tone average in the VT group was 5.6 dB A better than that in the WW group. After 12 mo, most of the advantage in the VT group had disappeared. After the insertion of ventilation tubes, the children with poorer hearing levels at randomization improved more than the children with better hearing levels. The largest difference in hearing levels was found between the children in the VT group whose ventilation tubes remained in situ and the children in the WW group. In the VT children with recurrence of OME, the hearing levels again increased, but remained slightly lower than those in the infants with persistent OME in the WW group. Conclusions Ventilation tubes have a beneficial effect on hearing in the short run (6 mo); this effect, however, largely disappears in the long run (12 mo). This is probably due to partial recurrent OME in the VT group and to partial spontaneous recovery in the WW group.


European Journal of Pediatrics | 1999

Day-care and otitis media in young children: a critical overview

M.M. Rovers; Gerhard A. Zielhuis; K.J.A.O. Ingels; G.J. van der Wilt

Abstract To review the evidence concerning the association between (different forms of) day-care and otitis media in children aged 0–4 years, we performed a meta-analysis of studies identified by a systematic search with Medline from 1966 to July 1997 and by the reference lists. Seventeen articles were classified as useful because these articles studied children of 0–4 years of age and because odds ratios as well as confidence intervals were presented or could be calculated. All these studies found a association between attending a day-care centre and otitis media. The association between otitis media and family care was less clear. Differences in study design, age of the subjects, and controlled variables did not explain the association. Conclusion Day-care is a risk factor for developing otitis media: the number of children seems to be important for this effect, probably due to increased exposure to otitis media pathogens.


European Archives of Oto-rhino-laryngology | 1993

THE MICROBIOLOGY OF ACUTE AND CHRONIC SINUSITIS AND OTITIS-MEDIA - A REVIEW.

P. Van Cauwenberge; A.-M. Vander Mijnsbrugge; K.J.A.O. Ingels

SummaryThere exists no real controversy about the role of aerobic bacteria in acute sinusitis and in acute otitis media. The “infernal trio”Streptococcus pneumoniae, Haemophilus influenzae andMoraxella catarrhalis are by far the most common pathogens in these acute infections. On the contrary, there is still much debate about the normal flora of the paranasal sinuses and the middle ear, although there are some reports of the presence of anaerobes and aerobes in the majority of the normal paranasal sinuses. In chronic sinusitis bacterio-logical cultures show a greater variation than those in acute sinusitis. Nonetheless, it is demonstrated in most studies that besides the “infernal trio” additional bacteria are present, including anaerobes and gram negative bacteria. In otitis media with effusion (OME) we find the same bacteria as in acute otitis media (AOM) and a pathologic flora in the nasopharynx seems to be important for both AOM and OME. In chronic otitis cultures are nearly always positive and revealPseudomonas species,Klebsiella pneumoniae, Staphylococcus aureus, Proteus species and anaerobes.


Allergy | 1997

Nasal biopsy is superior to nasal smear for finding eosinophils in nonallergic rhinitis

K.J.A.O. Ingels; J.P. Durdurez; C. Cuvelier; P. Van Cauwenberge

The presence of eosinophils was compared in nasal biopsy and smear. Thirty‐two nonallergic rhinitis patients, of whom six had nasal polyps, were included in the study. The specimens were studied light‐microscopically after staining with hematoxylin‐eosin. The association between the presence of polyps and the finding of eosinophils in the biopsy specimens proved to be significant. Ten normal subjects served as controls. It was far more simple to detect eosinophils in the biopsy samples than in the nasal smears. When we considered biopsies with at least four eosinophils in four fields as hypereosinophilic, our group of patients contained 25% nonallergic rhinitis with eosinophilia syndrome (NARES) patients.


Pediatrics | 2006

Effect of Combined Pneumococcal Conjugate and Polysaccharide Vaccination on Recurrent Otitis Media With Effusion

N. van Heerbeek; Masja Straetemans; Selma P. Wiertsema; K.J.A.O. Ingels; Ger T. Rijkers; Anne G. M. Schilder; Eam Sanders; Gerhard A. Zielhuis

BACKGROUND. Otitis media with effusion (OME) is very common during childhood. Because Streptococcus pneumoniae is one of the most common bacterial pathogens involved in OME, pneumococcal vaccines may have a role in the prevention of recurrent OME. OBJECTIVE. We sought to assess the effect of combined pneumococcal conjugate and polysaccharide vaccinations on the recurrence of OME. METHODS. A randomized, controlled trial was performed with 161 children, 2 to 8 years of age, with documented persistent bilateral OME. All subjects were treated with tympanostomy tubes (TTs). One half of the subjects were assigned randomly to additional vaccination with a 7-valent pneumococcal conjugate vaccine 3 to 4 weeks before and a 23-valent pneumococcal polysaccharide vaccine 3 months after tube insertion. Blood samples were drawn at the first vaccination, at the time of TT placement, and 1 and 3 months after the second vaccination. Levels of IgA and IgG serum antibody against the 7-valent pneumococcal conjugate vaccine serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F were measured with enzyme-linked immunosorbent assays. All children were monitored for recurrence of OME for 6 months after spontaneous extrusion of the TTs. RESULTS. The overall recurrence rate of bilateral OME was 50%. Pneumococcal vaccinations induced significant 4.6- to 24.4-fold increases in the geometric means of all conjugate vaccine serotype antibody titers but did not affect recurrence of OME. CONCLUSIONS. Combined pneumococcal conjugate and polysaccharide vaccination does not prevent recurrence of OME among children 2 to 8 years of age previously known to have persistent OME. Therefore, pneumococcal vaccines are not indicated for the treatment of children suffering from recurrent OME.


Journal of Clinical Epidemiology | 2001

Generalizability of trial results based on randomized versus nonrandomized allocation of OME infants to ventilation tubes or watchful waiting

Maroeska M. Rovers; Huub Straatman; K.J.A.O. Ingels; Gert Jan van der Wilt; Paul van den Broek; Gerhard A. Zielhuis

The objective was to study the generalizability of trial results by comparing randomized patients to eligible but nonrandomized patients who received the same management. Implementation of trial results is only justifiable when the results can be generalized to the total domain population. The design was a multicentre randomized controlled trial on the effect of early screening and treatment with ventilation tubes on infants with otitis media with effusion. Randomized (n = 187) and nonrandomized eligible patients (n = 133) were followed up. The study population comprised children who were detected by auditory screening at the age of 9-12 months and who were subsequently diagnosed with persistent bilateral otitis media with effusion for 4-6 months. A significant difference was found in the distribution of some prognostic factors: more randomized children had older siblings, did not attend day care and had mothers with a lower educational level than the nonrandomized children. These factors, however, did not modify the outcome. No differences were found in mean hearing levels between the randomized and nonrandomized children: in both the randomized and nonrandomized children ventilation tubes improved the hearing level, especially after 6 months. However, in the long term (12 months), the hearing levels were equal again. The results of the randomized and nonrandomized patients were comparable. The results of this trial appear to be generalizable to the total domain population. The procedure of following up both randomized and nonrandomized patients is recommended when there is concern about selective participation and reduced generalizability.


Annals of Otology, Rhinology, and Laryngology | 2001

Eustachian tube function in children after insertion of ventilation tubes.

Niels van Heerbeek; A.F.M. Snik; K.J.A.O. Ingels; Gerhard A. Zielhuis

This study was performed to assess the effect of the insertion of ventilation tubes and the subsequent aeration of the middle ear on eustachian tube (ET) function in children. Manometric ET function tests were performed repeatedly for 3 months after the placement of ventilation tubes in 83 children with otitis media with effusion (OME). Opening and closing pressures (passive tubal function) and active tubal function were measured. Analysis of the results showed a significant increase in opening pressure over time, whereas the closing pressure did not change. The active tubal function did not change and remained at the same poor level. Therefore, the opening pressure and closing pressure and, especially, the poor active tubal function, were more likely to be a causal factor of OME than a result. Certain children may have poor intrinsic ET function that makes them more susceptible to OME.


Plastic and Reconstructive Surgery | 2015

Negative predictors for satisfaction in patients seeking facial cosmetic surgery: a systematic review.

J.M. Herruer; J.B. Prins; N. van Heerbeek; G.W.J.A. Verhage-Damen; K.J.A.O. Ingels

Background: Facial cosmetic surgery is becoming more popular. Patients generally indicate they are satisfied with the results. Certain patient characteristics, however, have been described as negative predictors for satisfaction. Psychopathology such as body dysmorphic disorder and personality disorders are notorious. Psychosocial and cultural factors are more difficult to distinguish. This systematic review defines the predictors, other than body dysmorphic disorder, of an unsatisfactory outcome after facial cosmetic surgery. The authors are also interested in whether valid preoperative assessment instruments are available to determine these factors. Methods: An extensive systematic PubMed/MEDLINE and Cochrane Library search was performed. In addition, relevant studies from the reference lists of the selected articles were added. There were no publication-year restrictions, and the last search was conducted on July 20, 2014. All factors described as negative predictors for patient satisfaction after facial cosmetic surgery were identified. Results: Twenty-seven articles were analyzed, including 11 prospective studies, two retrospective studies, one case study, eight reviews, and five expert opinions. The following factors were identified: male sex, young age, unrealistic expectations, minimal deformities, demanding patients, “surgiholics,” relational or familial disturbances, an obsessive personality, and a narcissistic personality. Conclusions: This review indicates the possible demographic and psychosocial predictors for an unsatisfactory outcome of facial cosmetic surgery. A brief personality assessment tool that could be used to address predictors preoperatively was not found. The authors suggest use of the Glasgow Benefit Inventory to assess patient satisfaction postoperatively. Further research is being undertaken to develop such an instrument.


Otology & Neurotology | 2001

Reliability of manometric eustachian tube function tests in children

Niels van Heerbeek; K.J.A.O. Ingels; A.F.M. Snik; Gerhard A. Zielhuis

Objective To assess the reliability of manometric eustachian tube function tests in children with ventilation tubes in situ. Study Design Repeated manometric eustachian tube function tests during one session. Setting The study took place at a secondary referral hospital and a tertiary referral hospital. Patients Ninety-nine children with ventilation tubes in situ because of persistent otitis media with effusion. Main Outcome Measures Opening pressure (Po), closing pressure (Pc), and tubal function group. Results Analysis of Po and Pc showed a decrease with repeated measurement (p = 0.0001 and p = 0.001, respectively). The effect of repeated measurement on Po was more pronounced than the effect on Pc. The results of the first and second pressure equilibration tests showed 99% agreement. Conclusions: This study showed good reproducibility of the categorized results of the pressure equilibration test, whereas the results of the forced-response test seemed to be less reproducible and showed a downward shift with repeated measurement. A single measurement using wet swallowing and starting pressures of 100 and −100 daPa and the mean of the first three measurements of the Po and Pc are sufficient to determine tubal function. Further studies are needed to determine the discriminative power of these tests in children with different degrees of middle ear disease.


Acta Neurochirurgica | 2010

Variations of endonasal anatomy: relevance for the endoscopic endonasal transsphenoidal approach

Erik J. van Lindert; K.J.A.O. Ingels; Emmanuel A. M. Mylanus; J. André Grotenhuis

BackgroundThe endoscopic endonasal transsphenoidal approach (EETA) to the pituitary is performed by ear, nose, and throat (ENT) surgeons in collaboration with neurosurgeons but also by neurosurgeons alone even though neurosurgeons have not been trained in rhinological surgery.PurposeTo register the frequency of endonasal anatomical variations and to evaluate whether these variations hinder the progress of EETA and require extra rhinological surgical skills.MethodsA prospective cohort study of 185 consecutive patients receiving an EETA through a binostril approach was performed. All anatomical endonasal variations were noted and the relevance for the progress of surgery evaluated.ResultsIn 48% of patients, anatomical variations were recognized, the majority of which were spinae septi and septum deviations. In 5% of patients, the planned binostril approach had to be converted into a mononostril approach; whereas in 18% of patients with an anatomical variation, a correction had to be performed. There was no difference between the ENT surgeon and the neurosurgeon performing the approach. Complications related to the endonasal phase of the surgery occurred in 3.8%. Fluoroscopy or electromagnetic navigation has been used during 6.5% of the surgeries.ConclusionAlthough endonasal anatomical variations are frequent, they do not pose a relevant obstacle for EETA.

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Gerhard A. Zielhuis

Radboud University Nijmegen Medical Centre

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M.M. Rovers

Radboud University Nijmegen

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Freddy Mortier

Vrije Universiteit Brussel

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Johan Bilsen

Vrije Universiteit Brussel

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G.A. Zielhuis

Radboud University Nijmegen

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G.J. van der Wilt

Radboud University Nijmegen

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Huub Straatman

Radboud University Nijmegen

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