Active clinical trials for "Constriction, Pathologic"

The objective is to observe the evolution of walking parameters during the surgery process and find which of all calculated walking parameters represent the best indicators of functional disabilities and postoperative recovery for patient with lumbar spinal stenosis.

The photographical and functional parameters of paravertebral muscle in patients with lumbar spinal stenosis will be measured to investigate the correlation between paravertebral muscle degeneration and symptoms and prognosis of patients.By measuring the parameters of paravertebral muscle with normal people, the differences between the patients and normal people will be compared to establish an appropriate paravertebral muscle evaluation method.

Radiation (RT) affects the vagina by narrowing, tightening and scarring, termed vaginal stenosis (VS). VS occurs in up to 88% of patients treated with radiation for cervical cancer. VS is not well characterized in measurements. There is a lack of understanding of how short and tight the vagina becomes after RT. This study will use specific measurements of the vagina during the routine physician physical exam after RT in the follow up periods: after RT, 3 months, 6 months, and 12 months using a plastic commercial dilator set and length and width measurements. In addition, the study use a validated sexual health survey and a specific survey on vaginal dilation preferences to help stop VS after RT.

Aortic valve stenosis (AS) affects 2-7% of persons > 65 years, symptoms include: angina and dyspnea, dizziness and syncope. Coincidence of coronary artery disease (CAD), also presenting with angina and dyspnea, in patients with AS between 40 - 65% . Angina in AS caused by significant reduction of coronary flow reserve (CFR). CFR is the ratio of maximal flow increase in the coronary vessel bed during maximal hyperaemia (medically or exercise induced). FFR (fractional flow reserve) use in patients with AS potentially invalid due to dysfunctional CFR leading to potential undertreatment of CAD in these patients.CFR disturbance in AS mainly due to myocardial overload causing concentric hypertrophy, increased oxygen consumption and neurohormonal activation leading to increased vascular resistance. Current studies are investigating the validity of FFR and iFR in AS patients. Recent data demonstrate very good correlation between FFR and iFR derived values to PET myocardial perfusion imaging values in patients with no evidence of AS. Our study aims to investigate the diagnostic performance of FFR and iFR in intermediate-grade coronary stenosis in patients with severe aortic valve disease and correlate FFR- and iFR derived values with those extracted from PET-perfusion Imaging.

The ATLAS TAVI Registry is a retrospective, investigator-initiated, multicenter registry including patients, who underwent Transcatheter Aortic Valve Implantation (TAVI) for classical or paradoxical low-flow, low-gradient aortic stenosis (LFLG AS) with available non-contrast MSCT data on aortic valve calcification (AVC). The main objective of this study is the assessment of outcome after TAVI according to AVC density severity in patients with LFLG AS.

This study aims to identify the molecular genetic causes of the variability in development of calcific aortic valve disease in bicuspid and tricuspid aortic valves and their associated aortic dilation.

The study will evaluate the results of endoscopic treatment of NON-anastomotic biliary strictures following liver transplantation

This retrospective studed included patients referred to our institution between December 2013 and december 2021 for septoplasty or septorhinoplasty. All patients underwent pre operatory paranasal sinus CT scan and olfactory test. Olfacory cleft stenosis will be quoted as none (less than 1/3 contact between nasal septum and ethmoïd turbinates), partial (1/3-2/3 contact between nasal septum and turbinates) or total (more than 2/3 contact between nasal septum and turbinates), as well as Olfactory Cleft obstruction as none (opacification less than 1/3 of olfactory cleft), partial (1/3-2/3 opacification) or complete (more than 2/3 opacification).

After respiratory weaning, decannulation is sought. To do this, the tracheal cannula is first unblocked, so that patients no longer breathe in and out through the cannula, but (at least partially) "passing" the cannula by the natural route. In the presence of tracheal stenosis there is increased breathing effort, possibly restlessness and stridor. This constellation of symptoms suggests the suspicion of tracheal stenosis, so in the next step a tracheoscopy is performed to confirm or exclude tracheal stenosis. In case of symptomatic tracheal stenosis and at least 30-50% stenosis of the trachea (clinical symptoms can be expected from a 30-50% stenosis) then appropriate therapy (here: cryotherapy, other techniques only in exceptional cases) is planned. The goal is to be able to remove the tracheal cannula (long term) after successful therapy, so that patients do not have to be permanently provided with a tracheal cannula. There is no definitive/evidence-based standard therapy for the treatment of tracheal stenosis. Cryotherapy is a gentle therapy that has already been applied and described for the treatment of tracheal stenosis (see above). The examination is performed as part of an analgesic dose, as is routine for a bronchoscopy (in-house SOP). After treatment, a follow-up is planned for about 10 days later.

Cystectomy is the chosen treatment of bladder cancer in 400 cases every year in DK. In replacement of the removed bladder, a urinary diversion is constructed using 15cm of terminal ilium (Ad Modum Bricker). Ureteral strictures are diagnosed in 15% of the cystectomized patients, and these patients are at increased risk of infections, loss of renal function and repeated interventions. The left ureter is diagnosed with 70% of all strictures, presumably due to the construction of the urinary diversion. A modified urinary diversion have been tested in two small studies. The modified diversion is prolonged with 5cm compared to the conventional urinary diversion. The prolongation permits the urinary diversion to reach both the left and the right side of the abdomen, resulting in greater resection of non-viably distal ureter and less mobilization of the left ureter, lowering the rates of strictures.