Bestimmung der arteriellen Input-Funktion in Mäusen: Charakterisierung der Dispersion in einem extrakorporalen Shunt-System

2021 ◽  
Author(s):  
F Büther ◽  
F Gierse ◽  
KP Schäfers ◽  
S Hermann ◽  
M Schäfers ◽  
...  
Keyword(s):  
Shunt System

scholarly journals An Indigenous Method of Securing Ventriculoperitoneal Shunt Tube in Peritoneal Cavity

2021 ◽  
Author(s):  
Samir Kumar Kalra ◽  
Krishna Shah ◽  
Sneyhil Tyagi ◽  
Suviraj John ◽  
Rajesh Acharya
Keyword(s):  
Ventriculoperitoneal Shunt ◽  
Operation Time ◽  
Complication Rates ◽  
Effective Technique ◽  
Common Procedure ◽  
Shunt System ◽  
Shunt Tube ◽  
Csf Diversion ◽  
Median Operation Time

Abstract Introduction Ventriculoperitoneal shunt (VPS) is the most common procedure used for cerebrospinal fluid (CSF) diversion in hydrocephalus. Over the years, many technical, procedural, and instrument-related advancements have taken place which have reduced the associated complication rates. Shunt block is a very common complication irrespective of the shunt system used. The abdominal end of the shunt tube gets blocked usually due to plugging of omentum onto the shunt catheter. We describe a technique of catheter fixation and placement under vision coupled with omentopexy done laparoscopically to prevent this complication. Materials and Methods This technique was used in 23 patients (11 female, 12 male; range 16–73 years) afflicted with hydrocephalus from June 2016 and December 2019 after obtaining an informed consent, and the outcomes were noted in terms of shunt patency, complications, if any, and the need for revision. Results The median operation time was 90 minutes (range 35–160 minutes). All shunt catheters were still functional after a mean follow-up of 16.5 months (range 1–34 months) and none required revision. Conclusion Laparoscopic placement of shunt tube along with omental folding is a safe and effective technique for salvaging the abdominal end of VPS and may be helpful in reducing shunt blockage.

Radiographic assessment of snap-shunt failure

2010 ◽  
Vol 6 (3) ◽  
pp. 299-302 ◽  
Author(s):  
Anand I. Rughani ◽  
Bruce I. Tranmer ◽  
Jeffrey E. Florman ◽  
James T. Wilson
Keyword(s):  
Normal Values ◽  
Clinical Symptoms ◽  
Type System ◽  
Shunt Malfunction ◽  
Ct Scans ◽  
Shunt Revision ◽  
Ventricular Catheter ◽  
Shunt Failure ◽  
Shunt System ◽  
Ct Finding

Accurate assessment of imaging studies in patients with ventriculoperitoneal shunts can be aided by empirical findings. The authors characterize an objective measurement easily performed on head CT scans with the goal of producing clear evidence of shunt fracture or disconnection in patients with a snap shunt–type system. The authors describe 2 cases of ventriculoperitoneal shunt failure involving a fracture and a disconnection associated with a snap-shunt assembly. In both cases the initial clinical symptoms were not convincing for shunt malfunction, and the interpretation of the CT finding failed to immediately identify the abnormality. As the clinical picture became more convincing for shunt malfunction, each patient subsequently underwent successful shunt revision. The authors reviewed the CT scans of 10 patients with an intact and functioning snap-shunt system to characterize the normal appearance of the snap-shunt connection. On CT scans the distance between the radiopaque portion of the ventricular catheter and the radiopaque portion of the reservoir dome measures an average of 4.72 mm (range 4.6–4.9 mm, 95% CI 4.63–4.81 mm). In the authors' patient with a fractured ventricular catheter, this interval measured 7.8 mm, and in the patient with a disconnection it measured 7.7 mm. In comparison with the range of normal values, a radiolucent interval significantly greater than 4.9 mm should promptly raise concern for a disconnected or fractured shunt in this system. This measurement may prove particularly useful when serial imaging is not readily available.

Craniotomy for Fenestration of Multiloculated Hydrocephalus in Pediatric Patients

2005 ◽  
Vol 57 (suppl_1) ◽  
pp. 100-106 ◽  
Author(s):  
David I. Sandberg ◽  
J. Gordon McComb ◽  
Mark D. Krieger
Keyword(s):  
Pediatric Patients ◽  
Neurological Status ◽  
Neurological Deficits ◽  
Ventricular Catheter ◽  
Shunt System ◽  
Neurological Outcomes ◽  
Multiloculated Hydrocephalus ◽  
Before And After ◽  
Posterior Parietal ◽  
Ventricular Catheters

Abstract OBJECTIVE: To assess the treatment of progressive multiloculated hydrocephalus by craniotomy for microsurgical fenestration of cerebrospinal fluid (CSF) compartments to minimize the number of ventricular catheters. METHODS: We studied 33 pediatric patients who underwent craniotomies for fenestration of progressive multiloculated hydrocephalus between 1989 and 2003. In 20 of 33 patients, hydrocephalus was attributed to intraventricular hemorrhage associated with prematurity. Twenty-three of 33 patients had previous central nervous system infections. Craniotomy was typically performed via a posterior parietal approach. Communication between bilateral supratentorial loculated compartments and posterior fossa compartments was achieved. Surgical and neurological outcomes were assessed. RESULTS: Fenestration of loculated CSF spaces was performed successfully in all patients. No new neurological deficits were noted after surgery, and no patients required intraoperative blood transfusions. CSF infections within 3 months after surgery occurred in 4 of 33 patients. Over a median follow-up period of 3.7 years (range, 1.5 mo to 8.7 yr), 19 of 33 patients required additional fenestration procedures. The number of repeat fenestration procedures ranged from one to six, and a total of 47 additional fenestrations were performed in these 19 patients. The majority of patients (n = 25) ultimately required shunt systems with only one ventricular catheter. The neurological status of these patients was extremely poor both before and after surgery. Twenty-nine of 33 patients were severely delayed, and four were mildly delayed. CONCLUSION: Fenestration of multiloculated CSF compartments can enable most patients to function with a single ventricular catheter shunt system. Neurological status remains poor in this patient population.

Extrusion of the peritoneal catheter of a VP shunt system through a gastrostomy wound

2003 ◽  
Vol 60 (1) ◽  
pp. 68-69 ◽  
Author(s):  
Yung Chan ◽  
Narendra N Datta ◽  
Kwong Yau Chan ◽  
Safi Ur Rehman ◽  
Christopher Y.F Poon ◽  
...  
Keyword(s):  
Peritoneal Catheter ◽  
Shunt System ◽  
Vp Shunt

Posture-related changes in the pressure environment of the ventriculoperitoneal shunt system

2000 ◽  
Vol 93 (4) ◽  
pp. 614-617 ◽  
Author(s):  
Yoshinaga Kajimoto ◽  
Tomio Ohta ◽  
Hiroji Miyake ◽  
Masanori Matsukawa ◽  
Daiji Ogawa ◽  
...  
Keyword(s):  
Intracranial Pressure ◽  
Perfusion Pressure ◽  
Upright Position ◽  
Intraabdominal Pressure ◽  
Preventive Effect ◽  
Shunt System ◽  
Content Type ◽  
Vp Shunt ◽  
Programmable Valve ◽  
Fine Print

Object. The purpose of this study is to clarify the whole pressure environment of the ventriculoperitoneal (VP) shunt system in patients with successfully treated hydrocephalus and to determine which factor of the pressure environment has a preventive effect on overdrainage.Methods. Thirteen patients with hydrocephalus who had been treated with VP shunt therapy by using a Codman– Hakim programmable valve without incidence of overdrainage were examined. The authors evaluated intracranial pressure (ICP), intraabdominal pressure (IAP), hydrostatic pressure (HP), and the perfusion pressure (PP) of the shunt system with the patients both supine and sitting.With patients supine, ICP, IAP, and HP were 4.6 ± 3 mm Hg, 5.7 ± 3.3 mm Hg, and 3.3 ± 1 mm Hg, respectively. As a result, the PP was only 2.2 ± 4.9 mm Hg. When the patients sat up, the IAP increased to 14.7 ± 4.8 mm Hg, and ICP decreased to −14.2 ± 4.5 mm Hg. The increased IAP and decreased ICP offset 67% of the HP (42.9 ± 3.5 mm Hg), and consequently the PP (14 ± 6.3 mm Hg) corresponded to only 33% of HP.Conclusions. The results observed in patients indicated that IAP as well as ICP play an important role in VP shunt therapy and that the increased IAP and the decreased ICP in patients placed in the upright position allow them to adapt to the siphoning effect and for overdrainage thereby to be avoided.

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