Long‐term evaluation of a new ventriculoperitoneal shunt valve system in a dog

Filgueiras, Richard da Rocha; Martins, Christine De Souza; Almeida, Ricardo Miyasaka de; Silva, Rosana Marques; Rocha, Martha de Souza Teixeira da; Firmino, Fernanda De Paula; Maguilnik, Samara; Medeiros, LuÃ­za QuintÃ£o

doi:10.1111/j.1476-4431.2009.00484.x

Cited by 9 publications

(7 citation statements)

References 10 publications

(24 reference statements)

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“…The use of an intraparenchymal microsensor allows continuous ICP monitoring to facilitate management (Bergsneider and others 2008). In the present case, implantation of a medium pressure valve (70–120 mm H 2 O) that works nearly at the normal ICP of dogs (Bagley 1996, Filgueiras Rda and others 2009) instead of a low-pressure valve (<70 mm H 2 O) from the beginning on would have been probably better to avoid CSF overdrainage. The use of programmable pressure valves is usually not possible for veterinary patients due to cost restrictions.…”

Section: Discussionmentioning

confidence: 68%

Slit ventricle syndrome and subdural haemorrhage due to suspected overshunting in a dog with hydrocephalus internus

Bittermann

Precht

Henke

et al. 2016

Vet Record Case Reports

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A 1.5-year-old Chihuahua was presented with clinical signs consistent with multifocal localisation. MRI revealed hydrocephalus internus. Following placement of a ventriculoperitoneal (VP) shunt with a low-pressure valve, improvement was noted. Clinical signs returned one month later. A second MRI revealed subdural haematoma, meningeal reaction and slit-like ventricles, and was interpreted as overshunting. Saline solution was injected in the ventricles via the shunt, which was then ligated. Clinical improvement was noted, followed again by relapse three months later. A third MRI revealed recurrence of hydrocephalus internus. The VP shunt was reconnected and, additionally, the valve was positioned and fixed in a vertical position. A disconnection of the valve occurred two weeks later, and the owners elected euthanasia. Complications following VP shunting in this case reveal many similarities to those described in overshunting in people and should be considered as a possible complication.

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Section: Discussionmentioning

confidence: 68%

Slit ventricle syndrome and subdural haemorrhage due to suspected overshunting in a dog with hydrocephalus internus

Bittermann

Precht

Henke

et al. 2016

Vet Record Case Reports

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“…Surgical treatment of hydrocephalus in small animals unresponsive to medical treatment consists of placement of a VPS; use of various systems has been described in the literature . These systems consist of a catheter placed through the occipital bone into the ventricular system and then led to a valve, which is positioned in the region of the neck . This is then connected to another catheter that is tunneled underneath the skin and placed into the abdominal cavity via a small paralumbal approach …”

Section: Discussionmentioning

confidence: 99%

“…In addition to medical management, placement of a ventriculoperitoneal shunt (VPS) system is a surgical treatment option for animals that do not respond well to medical treatment; however, the outcome is variable . Several different shunt systems are used in veterinary medicine, but general complications with VPS systems include bleeding, infection, disconnection, and overshunting or undershunting because of obstructions of various types .…”

Section: Introductionmentioning

confidence: 99%

Laparoscopic repositioning of an obstructed ventriculoperitoneal shunt catheter with laparoscopy‐assisted partial omentectomy and omentopexy

Brückner

2019

Veterinary Surgery

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Objective To describe the use of laparoscopy for repositioning of a ventriculoperitoneal shunt (VPS) catheter. Study design Case report. Animal One 11‐month‐old male cairn terrier weighing 5.5 kg. Methods The dog had placement of a VPS system for primary hydrocephalus at 4 months of age. Poor functioning of the shunt system was suspected because of deteriorating neurological signs. A contrast study of the VPS system provided evidence of a distal shunt obstruction, and repeated brain computed tomography (CT) was consistent with persistent hydrocephalus. Results Laparoscopy was used to free the abdominal catheter of the shunt system and perform a partial omentectomy and omentopexy of the remaining omentum. Concurrently, the dog was sterilized. Recovery was routine, and follow‐up CT 1 year after repositioning revealed that the hydrocephalus had substantially improved. Results of a contrast study of the VPS system also provided evidence that it was functional. Conclusion Ventriculoperitoneal shunt systems are placed in dogs with primary and secondary hydrocephalus, and complications are quite common, including obstruction, bleeding, infection, and overshunting or undershunting. This is the first published clinical case report in which the repositioning of a VPS catheter with partial omentectomy and omentopexy in a dog are described. Clinical significance Future studies may be performed to determine whether laparoscopy can be considered as a treatment to assist with safe placement of VPS systems, avoiding misplacement of the shunt system and iatrogenic damage to the viscera and vessels.

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“…Another potential complication is functional failure from overdrainage (Coates, 2006). Overdrainage occurs as a consequence of excessive CSF flow from the ventricles, normally associated with the use of low‐pressure valves in humans, and potentially resulting in subdural haematoma and cerebrocortical collapse (Platt et al, 2012); other signs reported in people are headache, vomiting, and changes in vision (Filgueiras Rda et al, 2009).…”

Section: Surgical Shuntingmentioning

confidence: 99%

Congenital hydrocephalus case study: pathophysiology, treatment and prognosis

Scarpante¹,

Paluš²,

Cherubini³

et al. 2013

Companion Animal

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A five-month-old female entire Chihuahua was referred to the neurology-neurosurgery service at Dick White Referrals for investigation of acute onset of fly catching episodes, left-sided head tilt and circling. General physical examination revealed presence of a large fontanelle, a dome-shaped head and papilloedema. On neurological evaluation, obtunded mental status, vestibular ataxia, bilaterally reduced menace response, spontaneous ventrolateral strabismus and increased segmental spinal cord reflexes were observed. The neuroanatomical localisation was consistent with a multifocal intracranial lesion. The suspected diagnosis based on signalment and clinical findings was congenital hydrocephalus; other differential diagnoses included various anomalous diseases, inflammatory/infectious and metabolic disorders.Haematology and serum biochemistry were within normal limits. Magnetic resonance (MR; Hitachi Aperto open magnet 0.4T) of the brain was performed. T1-weighted, T2-weighted and fluidattenuated inversion recovery (FLAIR) images were acquired in transverse, dorsal and sagittal planes. The images revealed severe

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Long‐term evaluation of a new ventriculoperitoneal shunt valve system in a dog

Cited by 9 publications

References 10 publications

Slit ventricle syndrome and subdural haemorrhage due to suspected overshunting in a dog with hydrocephalus internus

Slit ventricle syndrome and subdural haemorrhage due to suspected overshunting in a dog with hydrocephalus internus

Laparoscopic repositioning of an obstructed ventriculoperitoneal shunt catheter with laparoscopy‐assisted partial omentectomy and omentopexy

Congenital hydrocephalus case study: pathophysiology, treatment and prognosis

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