scholarly journals Cryptorchidism in common eutherian mammals

Reproduction ◽  
2007 ◽  
Vol 133 (3) ◽  
pp. 541-561 ◽  
Author(s):  
R P Amann ◽  
D N R Veeramachaneni
Keyword(s):  
Abdominal Cavity ◽  
Companion Animals ◽  
Laboratory Animals ◽  
Abdominal Pressure ◽  
Genitofemoral Nerve ◽  
Suspensory Ligament ◽  
Calcitonin Gene ◽  
Cauda Epididymidis ◽  
Testis Descent ◽  
Peritoneal Lining

Cryptorchidism is failure of one or both testes to descend into the scrotum. Primary fault lies in the testis. We provide a unifying cross-species interpretation of testis descent and urge the use of precise terminology. After differentiation, a testis is relocated to the scrotum in three sequential phases: abdominal translocation, holding a testis near the internal inguinal ring as the abdominal cavity expands away, along with slight downward migration; transinguinal migration, moving a cauda epididymidis and testis through the abdominal wall; and inguinoscrotal migration, moving a s.c. cauda epididymidis and testis to the bottom of the scrotum. The gubernaculum enlarges under stimulation of insulin-like peptide 3, to anchor the testis in place during gradual abdominal translocation. Concurrently, testosterone masculinizes the genitofemoral nerve. Cylindrical downward growth of the peritoneal lining into the gubernaculum forms the vaginal process, cremaster muscle(s) develop within the gubernaculum, and the cranial suspensory ligament regresses (testosterone not obligatory for latter). Transinguinal migration of a testis is rapid, apparently mediated by intra-abdominal pressure. Testosterone is not obligatory for correct inguinoscrotal migration of testes. However, normally testosterone stimulates growth of the vaginal process, secretion of calcitonin gene-related peptide by the genitofemoral nerve to provide directional guidance to the gubernaculum, and then regression of the gubernaculum and constriction of the inguinal canal. Cryptorchidism is more common in companion animals, pigs, or humans (2–12%) than in cattle or sheep (≤1%). Laboratory animals rarely are cryptorchid. In respect to non-scrotal locations, abdominal testes predominate in cats, dogs, and horses. Inguinal testes predominate in rabbits, are common in horses, and occasionally are found in cats and dogs. S.c. testes are found in cattle, cats and dogs, but are most common in humans.

scholarly journals Effect of intra-abdominal hypertension on the strength of the postoperative scar of a laparotomic wound

2020 ◽  
Vol 24 (2) ◽  
pp. 223-226
Author(s):  
I. K. Morar
Keyword(s):  
Mechanical Strength ◽  
Negative Impact ◽  
Abdominal Cavity ◽  
Study Groups ◽  
Laboratory Animals ◽  
Abdominal Pressure ◽  
Abdominal Hypertension ◽  
Laparotomy Wound ◽  
The Impact ◽  
Postoperative Scar

Annotation. One of the main factors of postoperative eventration is intra-abdominal hypertension, which occurs in various surgical pathologies of the abdominal cavity. Despite the presence of a large number of scientific papers on the negative effect of intra-abdominal hypertension on the morphological state of granulation tissue in the area of the laparotomy wound, there are no publications on the impact on the strength of the postoperative scar. Therefore, the study aimed to investigate in an experiment on small laboratory animals the effect of intra-abdominal hypertension on the mechanical strength of the postoperative scar of a laparotomy wound. The experiment was performed on 120 laboratory rats, which underwent a median laparotomy and brought together the edges of the musculoaponeurotic layer of the anterior abdominal wall with simple nodal sutures. The main group consisted of 72 animals who developed intra-abdominal hypertension by inserting a container (condom) with a certain amount of Furacilin into the abdominal cavity. The comparison group consisted of 48 animals who had an empty condom inserted into the abdominal cavity after laparotomy. The mechanical strength of the postoperative scar of the laparotomy wound was determined by the method of G. V. Petrovich (2010) on the 1st, 3rd, and 5th day after the creation of intra-abdominal hypertension, by measuring the level of intra-abdominal pressure at the time of rupture of the postoperative scar of the laparotomy wound. Statistical analysis of the results was performed using Microsoft Excel spreadsheets and a package of statistical processing software PAST. Differences between study groups were determined using Mann-Whitney criteria. The results of the study indicate that the created intra-abdominal hypertension leads to a decrease in the mechanical strength of the postoperative scar of the laparotomy wound. The degree of the negative impact of intra-abdominal hypertension on the strength of the postoperative scar is inversely proportional to the level of intra-abdominal pressure.

scholarly journals Neutrophil Gelatinase-Associated Lipocalin as a Marker for Renal Dysfunction Detection in Critically Ill Patients with Increased Intraabdominal Pressure

2017 ◽  
Vol 3 (1) ◽  
pp. 24-28
Author(s):  
Claudiu Puiac ◽  
Janos Szederjesi ◽  
Alexandra Lazăr ◽  
Codruța Bad ◽  
Lucian Pușcașiu
Keyword(s):  
Renal Function ◽  
Intensive Care ◽  
Creatinine Clearance ◽  
Critically Ill ◽  
Critically Ill Patients ◽  
Abdominal Cavity ◽  
Intraabdominal Pressure ◽  
Abdominal Pressure ◽  
Neutrophil Gelatinase Associated Lipocalin ◽  
Neutrophil Gelatinase

Abstract Introduction: Elevated intraabdominal pressure (IAP) it is known to have an impact on renal function trough the pressure transmitted from the abdominal cavity to the vasculature responsible for the renal blood flow. Intraabdominal pressure is found to be frequent in intensive care patients and also to be a predictor of mortality. Intra-abdominal high pressure is an entity that can have serious impact on intensive care admitted patients, studies concluding that if this condition progresses to abdominal compartment syndrome mortality is as high as 80%. Aim: The aim of this study was to observe if a link between increased intraabdominal pressure and modification in renal function exists (NGAL, creatinine clearance). Material and Method: The study enrolled 30 critically ill patients admitted in the Intensive Care Unit of SCJU Tîrgu Mures between November 2015 and August 2016. The study enrolled adult, hemodynamically stable patients admitted in intensive critical care - defined by a normal blood pressure maintained without any vasopressor or inotropic support, invasive monitoring using PICCO device and abdominal pressure monitoring. Results: The patients were divided into two groups based on the intraabdominal pressure values: normal intraabdominal pressure group= 52 values and increased intraabdominal group= 35 values. We compared the groups in the light of NGAL values, 24 hours diuresis, GFR and creatinine clearance. The groups are significantly different when compared in the light of NGAL values and GFR values. We obtained a statistically significant correlation between NGAL value and 24 hour diuresis. No other significant correlations were encountered between the studied items. Conclusions: NGAL values are increased in patients with high intraabdominal pressure which may suggest its utility as a cut off marker for patients with increased intraabdominal pressure. There is a significant decreased GFR in patient with elevated intraabdominal pressure, observation which can help in early detection of renal injury in patients due to high intraabdominal pressure. No correlation was found between creatinine clearance and increased intraabdominal pressure.

Abdominal distension alters regional pleural pressures and chest wall mechanics in pigs in vivo

1991 ◽  
Vol 70 (6) ◽  
pp. 2611-2618 ◽  
Author(s):  
T. Mutoh ◽  
W. J. Lamm ◽  
L. J. Embree ◽  
J. Hildebrandt ◽  
R. K. Albert
Keyword(s):  
Chest Wall ◽  
Respiratory System ◽  
Functional Residual Capacity ◽  
Total Lung Capacity ◽  
Abdominal Cavity ◽  
Abdominal Distension ◽  
Abdominal Pressure ◽  
Lung Capacity ◽  
Lung Expansion ◽  
Residual Capacity

Abdominal distension (AD) occurs in pregnancy and is also commonly seen in patients with ascites from various causes. Because the abdomen forms part of the "chest wall," the purpose of this study was to clarify the effects of AD on ventilatory mechanics. Airway pressure, four (vertical) regional pleural pressures, and abdominal pressure were measured in five anesthetized, paralyzed, and ventilated upright pigs. The effects of AD on the lung and chest wall were studied by inflating a liquid-filled balloon placed in the abdominal cavity. Respiratory system, chest wall, and lung pressure-volume (PV) relationships were measured on deflation from total lung capacity to residual volume, as well as in the tidal breathing range, before and 15 min after abdominal pressure was raised. Increasing abdominal pressure from 3 to 15 cmH2O decreased total lung capacity and functional residual capacity by approximately 40% and shifted the respiratory system and chest wall PV curves downward and to the right. Much smaller downward shifts in lung deflation curves were seen, with no change in the transdiaphragmatic PV relationship. All regional pleural pressures increased (became less negative) and, in the dependent region, approached 0 cmH2O at functional residual capacity. Tidal compliances of the respiratory system, chest wall, and lung were decreased 43, 42, and 48%, respectively. AD markedly alters respiratory system mechanics primarily by "stiffening" the diaphragm/abdomen part of the chest wall and secondarily by restricting lung expansion, thus shifting the lung PV curve as seen after chest strapping. The less negative pleural pressures in the dependent lung regions suggest that nonuniformities of ventilation could also be accentuated and gas exchange impaired by AD.

scholarly journals Results Of Treatment Of Acute Diffuse Purulent Peritonitis Using Laparostomy

2020 ◽  
Vol 02 (11) ◽  
pp. 66-71
Author(s):  
S. A. Ruziboev ◽  
◽  
A. A. Avazov ◽  
Sh. Kh. Sattarov ◽  
A. N. Elmuradov ◽  
...  
Keyword(s):  
Bacterial Translocation ◽  
Abdominal Cavity ◽  
Multiple Organ ◽  
The Body ◽  
Abdominal Pressure ◽  
Results Of Treatment ◽  
Abdominal Hypertension ◽  
Purulent Peritonitis ◽  
Intractable Problems ◽  
Cause Of Deaths

Currently, despite significant achievements in the field of surgery, anesthesiology and resuscitation, the results of treatment of patients with advanced purulent peritonitis remain one of the most intractable problems, almost every sixth patient with acute surgical diseases and injuries of the abdominal cavity is admitted to medical institutions with peritonitis [1,3] Common peritonitis in 17-29% complicates the course of most acute surgical diseases and is the main cause of deaths in surgical hospitals [3,7]. Lethality in advanced peritonitis remains extremely high and reaches 20-39% [1,2,4,5]. In recent decades, great importance has been attached to recording intra-abdominal pressure in purulent pathology of the abdominal cavity. It was found that intra-abdominal hypertension occurs in every third patient with acute surgical pathology and negatively affects the functioning of all organs and systems of the body [1,6,8]. Pathological changes that occur with acute and excessive increase in intra-abdominal pressure (IAP) are manifestations of abdominal compartment syndrome (ACS) with disorders of the cardiovascular system; urinary disorders, disorders of perfusion of internal organs and the development of intestinal ischemia, which contributes to bacterial translocation and endogenous infection [2,7,8]. Ischemic blood flow disorders of the splanchnic zone are fraught with the development of bacterial translocation and the development of systemic inflammatory response syndrome and multiple organ failure (PON). Unsatisfactoriness with such results gave rise to a fundamentally different approach to the surgical treatment of common forms of peritonitis-the introduction of an open abdominal management method based on the ideas of I. Mikulich (1881), Jean-Louis Faure (1928), N. S. Makoch (1984) and D. Steinberg (1979).

scholarly journals The Discovery of Zoonotic Protozoans in Fleas Parasitizing on Pets as a Potential Infection Threat

2020 ◽  
Vol 65 (4) ◽  
pp. 817-822
Author(s):  
Olga Pawełczyk ◽  
Marek Asman ◽  
Krzysztof Solarz
Keyword(s):  
Companion Animals ◽  
Babesia Microti ◽  
Laboratory Animals ◽  
Limited Information ◽  
Ctenocephalides Canis ◽  
Cat Fleas ◽  
Veterinary Importance ◽  
Pathogenic Agents

Abstract Purpose Fleas are insects with a high medical and veterinary importance. They may participate in spreading of many pathogenic agents, but still there is limited information about their possible reservoir or vector role for protozoans. The main aim of this study was an attempt of detection zoonotic pathogens, such as Babesia microti and Toxoplasma gondii in fleas Ctenocephalides felis felis and Ctenocephalides canis. Methods In 2013–2017, 155 fleas were captured from domestic dogs and cats in veterinary clinics, animal shelters and pet grooming salons in Upper Silesia Region in Poland. Then, the DNA was extracted from each Ctenocephalides flea by using the ammonia method. Samples were screened for the presence of B. microti and T. gondii using PCR and nested PCR methods. Results B. microti was reported in 6.6% of C. felis felis and 9.1% of C. canis, whereas the prevalence of coinfection with B. microti and T. gondii was 1.9% in cat fleas and 2.3% in dog fleas. Conclusion This study shows the first cases of B. microti occurrence and B. microti and T. gondii coinfection in Ctenocephalides fleas. The estimation of prevalence of examined protozoans may be useful considering the possibility of infection among companion animals, as well as during presentation of the potential risk of infection in humans. In order to clarify the role of C. felis felis and C. canis in transmission of B. microti and T. gondii, the another studies with in vitro cultures and laboratory animals are needed.

scholarly journals Total prostatectomy combined with urethral anastomosis in a dog: a case report

2019 ◽  
Vol 64 (No. 6) ◽  
pp. 280-286
Author(s):  
P Przadka ◽  
B Liszka ◽  
A Piatek ◽  
P Skrzypczak ◽  
S Dzimira ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Abdominal Cavity ◽  
Prostate Gland ◽  
Companion Animals ◽  
Clinical Signs ◽  
Skeletal System ◽  
Malignant Tumours ◽  
Neoplastic Process ◽  
Laparotomy Wound ◽  
Total Prostatectomy

Prostate cancer is the most common prostate disease diagnosed in castrated dogs. However, prostate cancer is considered to be quite rare in dog population. The presence of prostate tumours can lead to urethral obstruction. Other clinical signs include asymmetric, painful, hard growths on rectal examination, neurological deficit or lameness of the pelvic limbs and general symptoms such as anorexia, weight loss or difficult urination. The neoplastic process may spread to the neighbouring organs and give metastases to the lymph nodes, lungs and skeletal system. Patient with histopathologically confirmed prostate cancer should be examined for metastases. The prognosis is usually unfavourable because of late diagnosis and the presence of metastases. Therapeutic options include surgery, chemotherapy and radiotherapy. Complete prostatectomy carries with it many complications and often requires osteotomy of pelvic fusions. For that reason, total prostatectomy is not commonly performed in companion animals; however, it should be considered in cases of early detection with the absence of metastases. This report presents the procedure of a complete prostatectomy in a dog with a pre-pubic anastomosis of the urethra, without osteotomy of the pelvic septum. The anastomosis of the urinary tract was placed outside the abdominal cavity, caudally from the laparotomy wound. The presented technique seems to be appropriate for the treatment of malignant tumours of the prostate gland in dogs.

The post-buckling behaviour of the pressurized abdominal cavity during knees-bent lifts

1998 ◽  
Vol 212 (4) ◽  
pp. 253-263 ◽  
Author(s):  
K D Thomson
Keyword(s):  
Abdominal Cavity ◽  
Bending Moment ◽  
Abdominal Pressure ◽  
Abdominal Muscles ◽  
Stress Distributions ◽  
Post Buckling

When a person bends over to lift an object, the intra-abdominal pressure is insufficient to prevent the abdominal cavity from buckling. This paper is concerned with estimation of the extent of buckling, its effect on the bending moment capability of the abdominal cavity and the stress distributions in the abdominal muscles. Buckling decreases the bending moment capability of the abdominal cavity, increases the stresses in the oblique muscles and transversus, and reduces to zero the stress in the rectus muscles.

Localization of calcitonin gene-related peptide within the genitofemoral nerve in immature rats

1999 ◽  
Vol 34 (6) ◽  
pp. 986-991 ◽  
Author(s):  
Bernadette Schwindt ◽  
Pamela J Farmer ◽  
Lisa M Watts ◽  
Zoltan Hrabovszky ◽  
John M Hutson
Keyword(s):  
Calcitonin Gene Related Peptide ◽  
Genitofemoral Nerve ◽  
Related Peptide ◽  
Calcitonin Gene ◽  
Immature Rats
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