Publications by authors named "Konrad R Koch"

Purpose: Evaluate optic nerve sheath and pial diameters (ONSD, ONPD) via sonography and computed tomography (CT) after out-of-hospital cardiac arrest (CA) and to compare their prognostic significance with other imaging and laboratory biomarkers.

Materials And Methods: A prospective observational study enrolling patients after successful resuscitation between December 2017 and August 2021. ONSD and ONPD were measured with sonography.

View Article and Find Full Text PDF

Purpose: To evaluate a novel hydrophobic, non-diffractive, extended depth of focus (EDOF) intraocular lens (IOL) design in comparison to two monofocal aspheric lenses.

Methods: Inclusion criteria for this prospective, monocentric cohort study were opacification of the crystalline lens and patients' wishes for surgery. In the case of the EDOF IOL, patients asked for a presbyopia correction.

View Article and Find Full Text PDF

Purpose: To evaluate the presence and appearance of blood and lymphatic vessels in non-functioning bleb capsules of glaucoma drainage devices (GDD).

Materials And Methods: Non-functioning (n=14) GDD-bleb capsules of 12 patients were analyzed by immunohistochemistry for blood vessels (CD31, vascular endothelium), lymphatic vessels (lymphatic vessel endothelial hyaluronan receptor-1 [LYVE-1] and podoplanin) and macrophages (CD68).

Results: CD31+++ blood vessels and CD68+ macrophages were detected in the outer layer of all specimens.

View Article and Find Full Text PDF

A 48-year-old man presented with an Aspergillus fumigatus complex infection of an exenterated orbit. The OS had been exenterated 7 months ago, together with total parotidectomy and neck dissection followed by irradiation due to a massive squamous cell carcinoma with orbital invasion and lymphatic metastasis. The patient was under permanent immunosuppression with oral prednisone and tacrolimus due to a kidney transplantation 5 years ago.

View Article and Find Full Text PDF

Background: The three-dimensional surface imaging system is becoming more common in plastic surgeries. However, few studies have assessed three-dimensional periocular structures and surgical outcomes. This study aimed to propose a standardized three-dimensional anthropometric protocol for the periocular region, investigate its precision and accuracy, and determine the three-dimensional periocular anthropometric norms for young Caucasians.

View Article and Find Full Text PDF

The aim of this article is to provide an overview on the current state of personalized medicine in the systemic treatment of selected periocular tumors, such as basal cell carcinoma, Merkel cell carcinoma and conjunctival melanoma. This article therefore provides an extensive current literature review from PubMed including the current guidelines and standard operating procedures (SOP). As 90% of basal cell carcinomas have a pathologic activation of the sonic hedgehog pathway, vismodegib is a new treatment option for inoperable or metastatic basal cell carcinoma and for patients with Gorlin-Goltz syndrome.

View Article and Find Full Text PDF

The development of microendoscopes in lacrimal drainage surgery has led to the introduction of novel surgical procedures that maintain transcanicular anatomy, including a variety of lacrimal drainage intubation systems. Depending on the location and extent of the lacrimal duct stenosis, bicanaliculoanular, monocanalicular, monocanaliculonasal, bicanalicular, and bicanaliculonasal intubation techniques and systems, as well as a combination of these, may be used. For isolated intubation of the puncta lacrimalia, perforated punctum plugs may be used, while pure monocanalicular intubation can be performed using a Mini-Monoka.

View Article and Find Full Text PDF

In Germany, Austria, and Switzerland, over 90% of ocularists still manufacture customized prostheses using cryolite glass from Thuringia. The present manuscript demonstrates this long-forgotten technique in detail. This manuscript shows some major advantages of manufacturing prosthetic eyes using cryolite glass in comparison to poly(methyl methacrylate) (PMMA).

View Article and Find Full Text PDF

To evaluate the role of sentinel lymph node biopsy (SLNB) in conjunctival melanoma (CM). This article provides a review of the literature from PUBMED. Data on SLNB in the management of CM are scarce and only two relatively large cohorts have been reported.

View Article and Find Full Text PDF
Article Synopsis
  • Retrobulbar haematoma (RBH) is a rare but serious condition that can occur after trauma or surgery, potentially threatening vision.
  • Early diagnosis and surgical intervention are crucial to prevent permanent vision loss, as increased pressure in the eye can compress the optic nerve.
  • Treatment typically involves a lateral canthotomy to relieve pressure, which can be done in the emergency room and may be necessary without imaging; if it fails, further surgery may be required, and systemic steroids are recommended for support.
View Article and Find Full Text PDF

Purpose: Non-invasive three-dimensional (3D) stereophotogrammetry is becoming increasingly popular in many fields. However, few studies have focused on its periocular application. We aimed to provide evidence for the periocular application of a novel anthropometric procedure using 3D stereophotogrammetry by evaluating its reliability.

View Article and Find Full Text PDF

Background: A space-occupying lesion of the eyelid in young adults is often a sign of an inflammation, a trauma or a benign neoplasm. The aim of this case report is to demonstrate a rare basal cell carcinoma, which presumably already arose in adolescence without further high-risk factors.

Methods: A 28-year-old male patient presented for a second opinion on a painless swelling of the right lower eyelid.

View Article and Find Full Text PDF

Purpose: To investigate mucoid discharge and the inflammatory response of anophthalmic sockets to cryolite glass prosthetic eye wear.

Patients And Methods: A total of 101 cryolite glass prosthetic eye wearers used visual analog scales (0-10) to measure frequency, color, volume, and viscosity of mucoid discharge associated with their prosthesis. Standardized photographs of the conjunctiva of their anophthalmic sockets were taken and conjunctival inflammation was semi-quantitatively graded (0-4).

View Article and Find Full Text PDF

Background: A smooth supply with a visually appealing prosthetic eye after enucleation is not just a cosmetic solution, it is also a key factor in successful social and psychological rehabilitation.

Objectives: This article provides an overview of the current state of medical and ocular care regarding prosthetic eyes in Germany. It focuses mainly on the newest clinical results, daily care, complications, and psychological aspects of wearing prosthetic eyes.

View Article and Find Full Text PDF

Purpose: External dacryocystorhinostomy (DCR) is considered as the gold standard in the treatment of acquired nasolacrimal duct obstruction. However, many advances have been made towards the development of modern minimally invasive therapies. These new techniques were proven less harmful to the patients' skin and medial palpebral structures with their palpebral-canalicular pump mechanism.

View Article and Find Full Text PDF

Purpose: The purpose of the present study was to evaluate whether preexisting epiretinal membrane (ERM) is a significant risk factor for developing pseudophakic cystoid macular edema (PCME).

Methods: Two hundred four consecutive eyes and 153 consecutive eyes without preexisting epiretinal membranes were retrospectively compared regarding PCME development following phacoemulsification with posterior chamber lens implantation. Patients with vascular retinal diseases, uveitis, trauma, neovascular macular degeneration, chronic inflammatory conditions, diabetic retinopathy, endophthalmitis, eventful cataract surgery, and combination of cataract surgery and vitrectomy during the observation period were excluded.

View Article and Find Full Text PDF

Purpose: To compare the concerns of experienced cryolite glass and (poly)methyl methacrylate (PMMA) prosthetic eye wearers.

Methods: One hundred six experienced cryolite glass and 63 experienced PMMA prosthetic eye wearers completed an anonymous questionnaire regarding general and specific prosthetic eye concerns at least 2 years after natural eye loss. From these independent anophthalmic populations, we identified 34 case-control pairs matched for the known influencing demographic variables of gender, occupation, age, and time since natural eye loss.

View Article and Find Full Text PDF

 Here, we present the case history of a 76-year old man with out-of-hospital cardiac arrest due to a cardiogenic shock and a consecutive no-flow-time of approximately 10 minutes. After 25 minutes of resuscitation procedures a spontaneous return of circulation could be established. The patient was admitted to our center for emergency coronary angiography.

View Article and Find Full Text PDF

Purpose: To identify the main concerns of patients experienced in wearing cryolite glass prosthetic eyes and to investigate how these have changed over time.

Methods: One hundred six patients experienced in wearing prosthetic eyes for at least 2 years were asked to complete an anonymous questionnaire regarding prosthetic eye concerns at the time of initial eye loss and at the present time. Main outcome measures included changes in levels of concern over time.

View Article and Find Full Text PDF

The most common iris lesions are iris nevi, iris melanomas and iris pigment epithelium cysts. However, there is an abundance of rare differential diagnoses that have to be considered, including other melanocytic and non-melanocytic lesions. Diagnostic tools include the slit lamp examination, gonioscopy, tonometry, transillumination, ultrasound biomicroscopy (UBM), optical coherence tomography, fluorescein angiography and standardized photography-assisted documentation.

View Article and Find Full Text PDF

Background/aims: To report a case and the histopathology of uveal melanoma cell seeding following transretinal tumor biopsy for a suspected uveal lesion.

Methods: Interventional case report.

Results: A 66-year-old male presented with a pigmented perilimbal episcleral lesion overlying an intraocular mass at the pars plana, 3.

View Article and Find Full Text PDF